ORCID Profile
0000-0003-1843-597X
Current Organisation
King's College London
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Electrochemistry | Physical Chemistry (Incl. Structural) | Physical Chemistry of Materials | Colloid and Surface Chemistry | Organic Green Chemistry |
Expanding Knowledge in the Chemical Sciences | Renewable Energy not elsewhere classified | Organic Industrial Chemicals (excl. Resins, Rubber and Plastics) | Production of Biofuels (Biomass) | Expanding Knowledge in Technology
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC90189A
Abstract: For the third time, a Faraday Discussion addressed ionic liquids. Encompassing the wealth of research in this field, the contributions ranged from fundamental insights to the erse applications of ionic liquids. Lively discussions initiated in the lecture hall and during poster sessions then seamlessly continued during the social program.
Publisher: American Chemical Society (ACS)
Date: 13-08-2008
DOI: 10.1021/JP803349Z
Publisher: Elsevier BV
Date: 08-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CP02527D
Abstract: NMR, thermoelectrochemical and Kamlet–Taft solvochromatic analyses provide insight into the coordination of lithium in both dilute and concentrated lithium–glyme solutions.
Publisher: Elsevier BV
Date: 07-2010
Publisher: American Chemical Society (ACS)
Date: 13-11-2008
DOI: 10.1021/JP8082437
Publisher: Elsevier BV
Date: 10-2012
DOI: 10.1016/J.JCIS.2012.06.028
Abstract: Herein, we report the synthesis of three covalently linked superparamagnetic nanocrystal-multi-walled carbon nanotube (MWCNT) composites. A generic strategy for hiphilic polymer coating of nanocrystals and further functionalization for amide bond formation with the MWCNTs is discussed. This approach can in principle allow attachment of any colloidal nanocrystal to the MWCNTs. The materials were characterized at each stage of the syntheses using DLS, zeta-potential measurements, FT-IR, TEM, and XPS techniques. The practicality of this linkage is demonstrated by the reversible magnetic immobilization of these materials on an electrode during non-aqueous electrochemistry.
Publisher: The Electrochemical Society
Date: 2011
DOI: 10.1149/1.3515169
Publisher: American Chemical Society (ACS)
Date: 07-02-2007
DOI: 10.1021/JP067236V
Abstract: The electrochemical oxidation of dissolved hydrogen gas has been studied in a range of room-temperature ionic liquids (RTILs), namely [C(2)mim][NTf(2)], [C(4)mim][NTf(2)], [N(6,2,2,2)][NTf(2)], [P(14,6,6,6)][NTf(2)], [C(4)mpyrr][NTf(2)], [C(4)mim][BF(4)], [C(4)mim][PF(6)], [C(4)mim][OTf], and [C(6)mim]Cl on a platinum microdisk electrode of diameter 10 microm. In all cases, except [C(6)mim]Cl, a broad quasi-electrochemically reversible oxidation peak between 0.3 to 1.3 V vs Ag was seen prior to electrode activation ([C(6)mim]Cl showed an almost irreversible wave). When the electrode was pre-anodized ("activated") at 2.0 V vs Ag for 1 min, the peak separations became smaller, and the peak shape became more electrochemically reversible. It is thought that the electrogenerated protons chemically combine with the anions (A-) of the RTIL. The appearance and position of the reverse (reduction) peak on the voltammograms is thought to depend on three factors: (1) the stability of the protonated anion, HA, (2) the position of equilibrium of the protonation reaction HA H+ + A- , and (3) any follow-up chemistry, e.g., dissociation or reaction of the protonated anion, HA. This is discussed for the five different anions studied. The reduction of HNTf(2) was also studied in two [NTf(2)]- -based RTILs and was compared to the oxidation waves from hydrogen. The results have implications for the defining of pKa in RTIL media, for the development of suitable reference electrodes for use in RTILs, and in the possible erometric sensing of H2 gas.
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1CC12336J
Abstract: The evaporation of dissolved ferrocene from non-volatile ionic liquids under a flow of nitrogen gas has been monitored voltammetrically and modelled mathematically. The rate of volatilisation was found to depend on the surface tension of the ionic liquid, and a model is presented.
Publisher: Elsevier BV
Date: 09-2013
Publisher: American Chemical Society (ACS)
Date: 07-11-2008
DOI: 10.1021/JE800678E
Publisher: American Chemical Society (ACS)
Date: 22-01-2009
DOI: 10.1021/AC802406K
Abstract: A microfluidic device designed for electrochemical studies on a microliter scale has been utilized for the examination of impurity levels in ionic liquids (ILs). Halide impurities are common following IL synthesis, and this study demonstrates the ability to quantify low concentrations of halide in a range of ILs to levels of approximately 5 ppm, even in ILs not currently measurable using other methods such as ion chromatography. To validate the mixer device, the electrochemistry of ferrocene was also examined and compared with spectroscopic and bulk electrochemistry measurements. An automated "s le preparation, delivery, and calibration" method was developed, and the chip successfully used for linear sweep, cyclic voltammetry (under both quiescent and steady-state flowing conditions), square wave voltammetry, and differential pulse voltammetry. An effective method of electrochemically cleaning the electrodes is also presented.
Publisher: American Chemical Society (ACS)
Date: 05-04-2008
DOI: 10.1021/JP800235T
Publisher: American Chemical Society (ACS)
Date: 09-05-2017
Publisher: Proceedings of the National Academy of Sciences
Date: 22-11-2011
Abstract: After 35 years the hunt for improved anthracycline antibiotics is unabated but has yet to achieve the levels of clinical success desired. Electrochemical techniques provide a large amount of kinetic and thermodynamic information, but the use of such procedures is hindered by issues of sensitivity and selectivity. This work demonstrates how by harnessing the mechanism of catalytic reduction of oxygen by the quinone functionality present within the anthracycline structure it is possible to study the reactive moiety in nanomolar concentration. This methodology allows electrochemical investigation of the intercalation of quinizarin into DNA and, in particular, the quinone oxidation and degradation mechanism. The reversible reduction of the quinizarin, which in the presence of oxygen leads to the formation of reactive oxygen species, is found to occur at -0.535 V (vs. SCE) pH 6.84 and the irreversible oxidation leading to the molecules degradation occurs at +0.386 V (vs. SCE) pH 6.84.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4NJ90051K
Abstract: Correction for ‘Extraction and electrochemical detection of capsaicin and ascorbic acid from fresh chilli using ionic liquids’ by Benjamin B. Y. Lau et al., New J. Chem. , 2015, DOI: 10.1039/c4nj01416b.
Publisher: Wiley
Date: 20-12-2011
Publisher: American Chemical Society (ACS)
Date: 25-07-2008
DOI: 10.1021/JP802996Q
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2NJ20704D
Publisher: Elsevier BV
Date: 11-2006
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9CC07046J
Abstract: AuNP easily synthesised inside bulk hydrogel spheres stable and catalytically active, even in high ionic strength environments.
Publisher: American Chemical Society (ACS)
Date: 10-01-2008
DOI: 10.1021/JP7103598
Publisher: Elsevier BV
Date: 11-0055
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0GC01878C
Abstract: Conventional electrically in-series thermogalvanic cells are proven options to chemically convert waste heat into electricity, but often utilise incompatible chemicals. This work reports significantly safer and more robust cell chemistry.
Publisher: American Chemical Society (ACS)
Date: 06-2007
DOI: 10.1021/JP0715732
Publisher: American Chemical Society (ACS)
Date: 07-01-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7FD90091K
Publisher: Elsevier BV
Date: 11-2016
Publisher: Elsevier BV
Date: 02-2019
DOI: 10.1016/J.ACA.2018.09.055
Abstract: In erometric gas sensors, the flux of gas to electrode surfaces determines the analytical response and detection limit. For trace concentration detection, the resulting low current prevents the miniaturisation of such sensors. Therefore, in this study, we have developed repeating arrays of nanostructures which maximise flux towards their surface. Unique platinum 3D cauliflower-shaped deposits with in idual floret-shaped segments have been produced in a single step electrodeposition process. The confined walls of recessed microelectrode arrays (10 μm in diameter, 90 electrodes) are utilized to produce these structures with a high surface area. Distinct segments are observed, with the gaps corresponding to electrodes adjacent in the microarray thus the majority of the deposits face the primary diffusion zones. The sizes and shapes of the deposits are characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM) and the largest structures are found to be 22 ± 1 μm in width and 7.9 ± 0.2 μm in height over the microhole. These modified electrodes are employed to detect ammonia using the room temperature ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8SE00354H
Abstract: Cyanobacteria grown in nitrogen-rich industrial wastewater showed increased productivity and higher methane yields when used as a feedstock for methanogenesis.
Publisher: American Chemical Society (ACS)
Date: 13-02-2008
DOI: 10.1021/JP7109093
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0NJ00400F
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CP23801B
Abstract: The kinetics and mechanism of the proton reduction reaction in the room temperature ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C(2)mim][NTf(2)]) was studied at gold, molybdenum, nickel, titanium and platinum electrodes. Significant differences in electrochemical rate constants were observed between the different metals and with the corresponding processes in aqueous solution. The hydrogen evolution mechanism was consistent at all five metals in the ionic liquid, in stark contrast to the known behaviour in aqueous systems.
Publisher: Elsevier BV
Date: 02-2012
Publisher: Royal Society of Chemistry (RSC)
Date: 2007
DOI: 10.1039/B700212B
Abstract: X-Ray Photoelectron Spectroscopy (XPS) was used to quantify the amount of bromide ions present in two s les of [C(4)mpyrr]Br dissolved in the room temperature ionic liquid (RTIL) [C(4)mpyrr][N(Tf)2]. One s le was of a known concentration (0.436 Br atom%) the other was a saturated solution. The results obtained from quantitative XPS analysis indicated that the saturated s le had a concentration, or solubility, of 0.90 Br atom% (746 mM) at 298 K, which was then independently confirmed by potential-step chrono erometry of the same solution.
Publisher: American Chemical Society (ACS)
Date: 13-09-2021
Publisher: American Chemical Society (ACS)
Date: 28-08-2007
DOI: 10.1021/JP0737754
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CP04322H
Abstract: The thermoelectrochemistry of ferrocene tethered to anions and cations expands current theory to entropy changes involving zwitterions and adjacent charges.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2AN16261J
Abstract: Carbon black (CB) nanoparticles modified with fluorescein, a highly fluorescent molecule, were prepared using a facile and efficient methodology. Simply stirring CB in aqueous solution containing fluorescein resulted in the strong physisorption of fluorescein onto the CB surface. The resulting Fluorescein/CB was then characterised by means of X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), fluorescence microscopy and fluorescence spectroscopy. The optimum experimental conditions for fluorescence of Fluorescein/CB viz. fluorescence excitation and emission wavelengths, O(2) removal and the amount of Fluorescein/CB used, were investigated. The Fluorescein/CB was used as a fluorescent probe for the sensitive detection of Pd(II) in water, based on fluorescence quenching. The results demonstrated that the fluorescence intensity of Fluorescein/CB decreased with increasing Pd(II) concentration, and the fluorescence quenching process could be described by the Stern-Volmer equation. The limit of detection (LOD) for the fluorescence quenching of Fluorescein/CB by Pd(II) in aqueous solution was found to be 1.07 μM (based on 3σ). Last, approaches were studied for the removal of Fe(III) which interferes with the fluorescence quenching of Fluorescein/CB. Complexation of Fe(III) with salicylic acid was used to enhance and control the selectivity of Fluorescein/CB sensor towards Pd(II) in the presence of Fe(III).
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0EE00151A
Publisher: Elsevier BV
Date: 05-2019
Publisher: Elsevier BV
Date: 2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CC31402A
Abstract: The Hydrogen evolution reaction has been quantitatively investigated at a Pt electrode in series of room temperature ionic liquids vs. Ag/Ag(+) redox couple. The measured formal potentials of the H(2)/H(+) (HNTf(2)) redox couple in each RTIL reveals a dependence on the nature of anion, suggesting significant interaction between proton and anion.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CP23380K
Abstract: The voltammetric response of the quinone species 'quinizarin' (QZ) and its electrocatalytic reduction of oxygen are studied at a boron doped diamond electrode (BDD). It is demonstrated that, contrary to the widespread belief that adsorption of organic molecules on BDD is minimal, not only does QZ readily adsorb to the electrodes surface but this adsorption is also influenced at low surface coverages by the pre-exposure of the electrode to organic solvents. Furthermore, the nature of this adsorbed QZ species is investigated and a potential dependent phase transition is observed. This is to the authors knowledge the first system to exhibit a phase transition of an adsorbed species on a boron doped diamond surface. At low scan rates the system is found to oscillate these oscillations are ascribed to the presence of a 'negative differential resistance'.
Publisher: Wiley
Date: 27-05-2016
Abstract: Novel ionic liquids containing chlorine atoms on the imidazolium cation were synthesised. The physicochemical properties of these ionic liquids were investigated extensively, including glass transition, melting and decomposition temperatures, density, viscosity, miscibility with common solvents and electrochemical window. The behaviour of these ionic liquids as solvents was examined through temperature-dependent kinetic analyses on two reactions: a nucleophilic aromatic substitution (S
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4NJ01416B
Abstract: Capsaicin (flavour indicator) and ascorbic acid (vitamin C, freshness indicator) were simultaneously extracted from fresh chillies and quantified.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7FD90050C
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2NJ21007J
Publisher: CSIRO Publishing
Date: 2012
DOI: 10.1071/CH12324
Abstract: We present a review on the multifunctional use of ionic liquids with respect to lignin processing. In a biorefinery context, lignocellulosics could be used to provide sustainable sources of fuels such as bioethanol, and feedstock molecules for the chemical industry such as phenols and other aromatics. However, separation of lignin from cellulose and hemicellulose is a vital step. Ionic liquids can dissolve extensive quantities of biomass, and even be designed to be multifunctional solvents. We highlight the use of ionic liquids in selectively or non-selectively dissolving lignin, the depolymerization reactions that have been attempted on lignin in ionic liquids, and the effect ionic liquids have been observed to have on such processes. Finally, we present some of the challenges and issues that must be addressed before the informed and large-scale application of ionic liquids can be realized for lignin processing.
Publisher: Elsevier BV
Date: 08-2016
Publisher: American Chemical Society (ACS)
Date: 31-03-2015
Publisher: American Chemical Society (ACS)
Date: 29-05-2008
DOI: 10.1021/JP711897B
Abstract: The extraction of electrode kinetic parameters for electrochemical couples in room-temperature ionic liquids (RTILs) is currently an area of considerable interest. Electrochemists typically measure electrode kinetics in the limits of either transient planar or steady-state convergent diffusion for which the voltammetric response is well understood. In this paper we develop a general method allowing the extraction of this kinetic data in the region where the diffusion is intermediate between the planar and convergent limits, such as is often encountered in RTILs using microelectrode voltammetry. A general working surface is derived, allowing the inference of Butler-Volmer standard electrochemical rate constants for the peak-to-peak potential separation in a cyclic voltammogram as a function of voltage scan rate. The method is applied to the case of the ferrocene/ferrocenium couple in [C2mim][N(Tf)2] and [C4mim][N(Tf)2].
Publisher: Springer Science and Business Media LLC
Date: 11-02-2015
DOI: 10.1038/SREP08398
Abstract: Bacterial resistance to conventional antibiotics necessitates the identification of novel leads for infection control. Interference with extracellular phenomena, such as quorum sensing, extracellular DNA integrity and redox active metabolite release, represents a new frontier to control human pathogens such as Pseudomonas aeruginosa and hence reduce mortality. Here we reveal that the extracellular redox active virulence factor pyocyanin produced by P. aeruginosa binds directly to the deoxyribose-phosphate backbone of DNA and intercalates with DNA nitrogenous base pair regions. Binding results in local perturbations of the DNA double helix structure and enhanced electron transfer along the nucleic acid polymer. Pyocyanin binding to DNA also increases DNA solution viscosity. In contrast, antioxidants interacting with DNA and pyocyanin decrease DNA solution viscosity. Biofilms deficient in pyocyanin production and biofilms lacking extracellular DNA show similar architecture indicating the interaction is important in P. aeruginosa biofilm formation.
Publisher: American Chemical Society (ACS)
Date: 31-01-2008
DOI: 10.1021/JP710134E
Publisher: American Chemical Society (ACS)
Date: 26-06-2008
DOI: 10.1021/JP802934Y
Publisher: American Chemical Society (ACS)
Date: 25-06-2019
Publisher: Wiley
Date: 23-05-2011
Abstract: The volatilisation of ferrocene (Fc), dissolved in the ionic liquid N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, [C(4)mpyrr][NTf(2)], to the gas phase has been indirectly monitored by cyclic voltammetry and chrono erometry. Simulation of the observed trends in concentration with time using a simple model allowed quantification of the process. Volatilisation of dissolved Fc under flowing wet and dry dinitrogen gas (N(2)) was found to be kinetically limited with a rate constant in the region of 2×10(-7) cm s(-1). The activation energy of diffusion for Fc was found to be 28.2±0.7 kJ mol(-1), while the activation energy of volatilisation of Fc from [C(4)mpyrr][NTf(2)] to dry N(2) was found to be 85±2 kJ mol(-1).
Publisher: The Electrochemical Society
Date: 10-2010
DOI: 10.1149/1.3484810
Abstract: Cyclic voltammetric experiments were carried out on Li+, Na+, K+, Rb+ and Cs+ in ionic liquids (ILs). Alloy formation was noted at Pt microelectrodes, but not at Ni. A range of ILs was investigated to identify the best IL to study the M/M+ redox couples, and bulk electrodeposition of all metals was observed in at least one IL, N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([C4mpyrr][NTf2]). Mathematical simulation of the CVs in this IL was conducted as a function of temperature. The diffusion coefficients, D, of the five metal ions were determined. The formal potential, Ef0 (vs. Fc/Fc+) of the five M/M+ couples was quantified, as well as the electrochemical rate constants, k0, and transfer coefficients, α. The activation energies of diffusion, Ea,dif, of Li+ and Na+ ions, and electron transfer, Ea, of Li/Li+ and Na/Na+ were determined, and ΔS0 (vs. Fc/Fc+) estimated for the Na/Na+ couple. The trends within the group are discussed.
Publisher: American Chemical Society (ACS)
Date: 16-06-2007
DOI: 10.1021/JP0728104
Abstract: The electrochemical oxidation of potassium nitrite has been studied in the room temperature ionic liquid (RTIL) [C2mim][NTf2] by cyclic voltammetry at platinum electrodes. A chemically irreversible oxidation peak was observed, and a solubility of 7.5(+/-0.5) mM and diffusion coefficient of 2.0(+/-0.2)x10(-11) m2 s(-1) were calculated from potential step chrono erometry on the microdisk electrode. A second, and sometimes third, oxidation peak was also observed when the anodic limit was extended, and these were provisionally assigned to the oxidation of nitrogen dioxide (NO2) and nitrate (NO3-), respectively. The electrochemical oxidation of nitrogen dioxide gas (NO2) was also studied by cyclic voltammetry in [C2mim][NTf2] on Pt electrodes of various size, giving a solubility of ca. 51(+/-0.2) mM and diffusion coefficient of 1.6(+/-0.05)x10(-10) m2 s(-1) (at 25 degrees C). It is likely that NO2 exists predominantly as its dimer, N2O4, at room temperature. The oxidation mechanism follows a CE process, which involves the initial dissociation of the dimer to the monomer, followed by a one-electron oxidation. A second, larger oxidation peak was observed at more positive potentials and is thought to be the direct oxidation of N2O4. In addition to understanding the mechanisms of NO2- and NO2 oxidations, this work has implications in the electrochemical detection of nitrite ions and of NO2 gas in RTIL media, the latter which may be of particular use in gas sensing.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2CC05413B
Abstract: This study demonstrates the charge additivity of core valence metal ions with fixed ionic pendant groups can significantly boost the thermoelectrochemical valorisation of waste heat into electricity, but is solvent-specific.
Publisher: Wiley
Date: 20-04-2010
Publisher: Springer Science and Business Media LLC
Date: 10-06-2010
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CP02255C
Abstract: We have investigated the thermoelectrochemical properties of lithium bis(trifluoromethylsulfonyl)imide and tetraglyme mixtures, as dilute electrolytes and solvate ionic liquids.
Publisher: Elsevier BV
Date: 06-2011
Publisher: Elsevier BV
Date: 12-2015
DOI: 10.1016/J.BIORTECH.2015.08.056
Abstract: Aqueous solutions of tetrabutylphosphonium hydroxide have been evaluated as pretreatment media for rice husks, prior to sulphuric acid hydrolysis or cellulase enzymatic hydrolysis. Varying the water:tetrabutylphosphonium hydroxide ratio varied the rate of delignification, as well as silica, lignin and cellulose solubility. Pre-treatment with 60wt% hydroxide dissolved the rice husk and the regenerated material was thus heavily disrupted. Sulphuric acid hydrolysis of 60wt%-treated s les yielded the highest amount of glucose per gram of rice husk. Solutions with good lignin and silica solubility but only moderate to negligible cellulose solubility (10-40wt% hydroxide) were equally effective as pre-treatment media for both acid and enzymatic hydrolysis. However, pre-treatment with 60wt% hydroxide solutions was incompatible with downstream enzymatic hydrolysis. This was due to significant incorporation of phosphonium species in the regenerated biomass, which significantly inhibited the activity of the cellulase enzymes.
Publisher: Elsevier BV
Date: 06-2019
Publisher: American Chemical Society (ACS)
Date: 06-07-2011
DOI: 10.1021/JP205421Q
Publisher: American Chemical Society (ACS)
Date: 25-03-2008
DOI: 10.1021/JP800145K
Publisher: Wiley
Date: 24-10-2007
Publisher: Elsevier BV
Date: 2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0GC00450B
Publisher: The Electrochemical Society
Date: 10-2010
DOI: 10.1149/1.3484806
Abstract: The electrochemistry of various gases, including oxygen, carbon dioxide, hydrogen, ammonia, hydrogen sulfi de, sulfur dioxide and nitrogen dioxide, in room temperature ionic liquids (RTILs) is reviewed. The application of RTILs to gas sensor design and development is highlighted.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8DT04706E
Abstract: Copper( ii ) coordination complexes, 1 and 2 , containing nonsteroidal anti-inflammatory drugs (NSAIDs) potently kill breast cancer stem cells (CSCs) and bulk breast cancer cells.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CC05889A
Abstract: We demonstrate that combining two redox couples, in this case ferrocene–ferrocenium and iodide–triiodide, can result in a synergistic enhancement in the electrochemical thermal energy harvesting properties. Electron withdrawing groups on the ferrocene enhance this effect.
Publisher: Elsevier BV
Date: 07-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0AN02274H
Abstract: Cocaine s les were ‘finger-printed’ using e-MIPs, constructed on the surface of portable SPCEs. The SWV data with suitable chemometric analysis provides valuable information about the drugs’ provenience which is crucial to tackle drug traffic.
Publisher: Elsevier BV
Date: 08-2021
Publisher: Elsevier BV
Date: 06-2017
Publisher: Wiley
Date: 30-07-2014
Publisher: Royal Society of Chemistry
Publisher: American Chemical Society (ACS)
Date: 13-04-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1SC06340E
Abstract: We report the first genuine quantification of thermogalvanic heat-to-electricity conversion efficiency, for both the electrolyte and for the entire device.
Publisher: American Chemical Society (ACS)
Date: 02-04-2009
DOI: 10.1021/JP9015849
Publisher: Elsevier BV
Date: 07-2008
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0JM04493H
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2FD90012B
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0SE00440E
Abstract: Thermocells can sustainably generate electricity from waste heat temperature gradients. This study investigates numerous fundamental aspects of thermocells, and how to explain and model such aspects.
Publisher: Wiley
Date: 25-05-2011
Publisher: The Electrochemical Society
Date: 09-2016
DOI: 10.1149/MA2016-02/46/3424
Abstract: The electrochemical oxidation of glucose has been widely explored, primarily for analytical purposes. The combustion of glucose is also well established to occur. By combining an electrocatalyst for glucose oxidation, as well as an oxygen reduction electrocatalyst, it is possible to assemble air-batteries or fuel cells that can (non-enzymatically) harvest useful electrical energy from glucose. Cellulose is the most abundant biopolymer in the world, is a non-food crop waste material, and is made up on glucose sub-units. By studying the electrocatalytic oxidation of glucose, it is possible to develop electrochemical devices that could use cellulose (and by extension, waste lignocellulosic biomass) as a fuel. All that is required is a suitable electrolyte that can dissolve cellulose (and lignocellulosic biomass). Ionic liquids and certain aqueous hydroxides fulfil these criteria. We have been investigating the oxidation of glucose and cellulose, and developing genuine air-batteries that can exploit these materials. Focus has been upon (i) the electrolyte, which is critical in both solubilising the fuel, and in impacting electrocatalytic trends, (ii) dissolved molecules which can act as facile solution-phase electrocatalytic mediators for the oxidation processes, and (iii) nanostructured electrodes such as nanoporous gold, which can act as electrocatalytic electrodes for the direct oxidation of glucose and cellulose. In particular, it has been ensured that the electrolyte assists in the electrocatalytic processes and encourages depolymerisation of cellulose into glucose, ensuring high power electrochemical devices can be developed. Our progress in this area will be summarised.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1AY05667K
Publisher: WORLD SCIENTIFIC (EUROPE)
Date: 07-10-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0CP02261F
Abstract: The electrochemistry of hydrazine at platinum has been re-evaluated by an investigation using microelectrodes. Platinum oxides remaining from preceding oxidative scans results in hydrazine oxidation occurring up to ca. 400 mV more cathodic than at an oxide-free Pt electrode. The observed voltammetry at oxidised or 'activated' platinum electrodes was found to be a function of the immersion time (time since 'activation') and pH. Differences between phosphate, sulphate and acetate-based electrolytes are noted. The anodic hydrazine oxidation features at 'activated' electrodes occurred as a prewave or a prepeak, depending upon the electrolyte and scan rate employed. Although hydrazine is known to react with bulk Pt oxide, the loss of activation with time was found to be independent of hydrazine concentration and was instead a function of pH and supporting electrolyte, therefore the 'activation' corresponds to residual rather than bulk platinum oxide. The condition of platinum was examined by X-ray photoelectron spectroscopy (XPS), which demonstrated an increase in oxygen coverage with cycling and the absence of any strongly adsorbed or poisoning species. The facile oxidation of hydrazine has implications with regards to hydrogen storage, generation and fuel cells. The different effects corresponding to insufficient buffering, which has relevance to the electroanalytical detection of hydrazine, was also investigated.
Publisher: Elsevier BV
Date: 12-2011
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1GC02989D
Abstract: Thermogalvanic devices require anionic and cationic species the rational development of safe(r) iron-based anionic redox couples was explored.
Publisher: Royal Society of Chemistry (RSC)
Date: 2007
DOI: 10.1039/B701097D
Publisher: American Chemical Society (ACS)
Date: 30-08-2013
DOI: 10.1021/JP405759J
Publisher: American Chemical Society (ACS)
Date: 26-07-2011
DOI: 10.1021/CM201461W
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0AN00706D
Abstract: A simple but sensitive technique has been demonstrated towards the electroanalytical quantification of the strength of garlic. This technique can also be used to quantify dialkyldisulfides. The cyclic voltammetry of bromide was found to be a sensitive electrochemical probe, electrogenerated bromine reacting with dialkyldisulfides to catalytically regenerate bromide, resulting in a significant increase in peak current. A linear response of current vs. concentration was observed between 0.1 and 15 mM dipropyldisulfide at edge plane pyrolytic graphite (EPPG) electrodes a smaller range up to ca. 5 mM was available at screen printed carbon electrodes (SPCEs), with a detection limit (from 3σ) of 0.067 mM. The response of diallyldisulfide was found to be essentially identical. Shaking garlic puree in acetonitrile for 5 minutes, followed by dilution with water then recording the voltammetry at the cheap, disposable SPCE gave a linear trend in current with respect to the quantity of garlic present, corresponding to the diallyldisulfide extracted. This has potential applications in monitoring the garlic content of medicinal supplements, batch-to-batch variation and the stability of garlic during storage.
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1NJ20070D
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7FD90094E
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7GC00574A
Abstract: Hydroxide pre-treatment of rice husks allows enzymatic saccharification, carbon dioxide addition recovers silica, and calcium hydroxide addition completes the recycle.
Publisher: American Chemical Society (ACS)
Date: 14-05-2010
DOI: 10.1021/AC1006359
Abstract: Room temperature ionic liquids (RTILs) have been applied to a microelectrode array and been demonstrated to form effective, membrane-free erometric gas sensors. Determining the RTIL [P(6,6,6,14)][FAP] as the most appropriate choice for extended use, the erometric quantification of oxygen has been demonstrated. The response of the sensor was quantified by both cyclic voltammetry and chrono erometry. A range of O(2) contents (2-13% v/v) and RTIL layer thicknesses (from ca. 6 to 125 mum) have been investigated. The combination of microelectrode array and RTIL, as well as the absence of membrane and volatile solvent, results in an elegant, easy to calibrate gas sensor with potential utility in standard and nonstandard conditions.
Publisher: Wiley
Date: 05-08-2008
DOI: 10.1002/POC.1428
Publisher: American Chemical Society (ACS)
Date: 02-06-2009
DOI: 10.1021/JP902488E
Publisher: Elsevier BV
Date: 09-2015
Publisher: The Royal Society of Chemistry
Date: 12-10-2016
DOI: 10.1039/9781782622529-00341
Abstract: Ionic liquids are relatively new additions to the field of electrochemical sensing. Despite that, they have had a significant impact, and several major areas are covered herein. This includes the application of ionic liquids in the quantification of heavy metals, explosives, and chemical warfare agents, and in biosensors and bioanalysis. Also highlighted are the significant advantages ionic liquids inherently have with regards to gas sensors and carbon paste electrodes, by virtue of their non-volatility, inherent conductivity, and ersity of structure and function. Finally, their incorporation with carbon nanomaterials to form various gels, pastes, films, and printed electrodes is also highlighted.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8SE00416A
Abstract: The multi-faceted significance of the anion upon the thermoelectrochemistry of the iron( ii / iii ) redox couple has been extensively explored.
Publisher: Elsevier BV
Date: 08-2011
Publisher: Elsevier BV
Date: 06-2010
Publisher: American Chemical Society (ACS)
Date: 30-04-2008
DOI: 10.1021/JP800819K
Publisher: Wiley
Date: 08-04-2011
Abstract: The electrochemistry of formic acid, carbon monoxide and methanol have been investigated and evaluated in combination with hydrazine. Hydrazine was observed to display the anticipated steady-state oxidation waves at platinum (Pt) microelectrodes by cyclic voltammetry, and upon introduction of carbon monoxide (CO) gas, the Pt surface was fully passivated (prior to CO oxidation). However, the two in idual responses of hydrazine and formic acid (HCOOH) are to be additive when combined in solution. No detrimental effects were observed upon the hydrazine voltammetry, even in the presence of excess formic acid, despite formic acid clearly displaying characteristic self-poisoning tendencies (primarily due to the formation of CO) in its own voltammetry. Effects intermediate to those of CO and formic acid were observed when methanol was present. Currents were essentially additive at low methanol content, but hydrazine oxidation current decreased by about 40% when an 100-fold excess of methanol was present, corresponding to poisoning by methanol dehydrogenation intermediates. These results are discussed with relevance to mixed fuels for more flexible or powerful fuel cells, and the possible formation of a random microelectrode array (templated by strongly adsorbed poison) on the microelectrode surface.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7FD90093G
Publisher: American Chemical Society (ACS)
Date: 09-02-2010
DOI: 10.1021/JP911862M
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Start Date: 04-2013
End Date: 06-2016
Amount: $325,375.00
Funder: Australian Research Council
View Funded ActivityStart Date: 06-2017
End Date: 12-2021
Amount: $296,500.00
Funder: Australian Research Council
View Funded Activity