ORCID Profile
0000-0002-3008-8571
Current Organisation
University of Macau
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Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: Springer Science and Business Media LLC
Date: 07-01-2016
DOI: 10.1038/SREP17243
Abstract: New and novel 3D hierarchical porous graphene aerogels (HPGA) with uniform and tunable meso-pores (e.g., 21 and 53 nm) on graphene nanosheets (GNS) were prepared by a hydrothermal self-assembly process and an in-situ carbothermal reaction. The size and distribution of the meso-pores on the in idual GNS were uniform and could be tuned by controlling the sizes of the Co 3 O 4 NPs used in the hydrothermal reaction. This unique architecture of HPGA prevents the stacking of GNS and promises more electrochemically active sites that enhance the electrochemical storage level significantly. HPGA, as a lithium-ion battery anode, exhibited superior electrochemical performance, including a high reversible specific capacity of 1100 mAh/g at a current density of 0.1 A/g, outstanding cycling stability and excellent rate performance. Even at a large current density of 20 A/g, the reversible capacity was retained at 300 mAh/g, which is larger than that of most porous carbon-based anodes reported, suggesting it to be a promising candidate for energy storage. The proposed 3D HPGA is expected to provide an important platform that can promote the development of 3D topological porous systems in a range of energy storage and generation fields.
Publisher: Wiley
Date: 24-10-2016
DOI: 10.1111/JVH.12627
Abstract: Prisoner populations are characterized by high rates of hepatitis C (HCV), up to thirty times that of the general population in Australia. Within Australian prisons, less than 1% of eligible inmates access treatment. Public health strategies informed by social capital could be important in addressing this inequality in access to HCV treatment. Twenty-eight male inmates participated in qualitative interviews across three correctional centres in New South Wales, Australia. All participants had recently tested as HCV RNA positive or were receiving HCV treatment. Analysis was conducted with participants including men with experiences of HCV treatment (n=10) (including those currently accessing treatment and those with a history of treatment) and those who were treatment naïve (n=18). Social capital was a resourceful commodity for inmates considering and undergoing treatment while in custody. Inmates were a valuable resource for information regarding HCV treatment, including personal accounts and reassurance (bonding social capital), while nurses a resource for the provision of information and care (linking social capital). Although linking social capital between inmates and nurses appeared influential in HCV treatment access, there remained opportunities for increasing linking social capital within the prison setting (such as nurse-led engagement within the prisons). Bonding and linking social capital can be valuable resources in promoting HCV treatment awareness, uptake and adherence. Peer-based programmes are likely to be influential in promoting HCV outcomes in the prison setting. Engagement in prisons, outside of the clinics, would enhance opportunities for linking social capital to influence HCV treatment outcomes.
Publisher: Wiley
Date: 09-12-2022
Abstract: Platinum (Pt) remains the benchmark electrocatalyst for alkaline hydrogen evolution reaction (HER), but its industry‐scale hydrogen production is severely h ered by the lack of well‐designed durable Pt‐based materials that can operate at ere‐level current densities. Herein, based on the original oxide layer and parallel convex structure on the surface of nickel foam (NF), a 3D quasi‐parallel architecture consisting of dense Pt nanoparticles (NPs) immobilized oxygen vacancy‐rich NiO x heterojunctions (Pt/NiO x ‐O V ) as an alkaline HER catalyst is developed. A combined experimental and theoretical studies manifest that anchoring Pt NPs on NiO x ‐O V leads to electron‐rich Pt species with altered density of states (DOS) distribution, which can efficiently optimize the d‐band center and the adsorption of reaction intermediates as well as enhance the water dissociation ability. The as‐prepared catalyst exhibits extraordinary HER performance with a low overpotential of 19.4 mV at 10 mA cm −2 , a mass activity 16.3‐fold higher than that of 20% Pt/C, and a long durability of more than 100 h at 1000 mA cm −2 . Furthermore, the assembled alkaline electrolyzer combined with NiFe‐layered double hydroxide requires extremely low voltage of 1.776 V to attain 1000 mA cm −2 , and can operate stably for more than 400 h, which is rarely achieved.
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA10657H
Publisher: Hindawi Limited
Date: 17-08-2023
DOI: 10.1155/2023/5901128
Abstract: COVID-19 vaccination is particularly challenging among populations who have experienced discrimination in healthcare settings. This paper presents qualitative findings from in-depth interviews about COVID-19 vaccination conducted in Australia between October 2020 and November 2021. Data from four different studies are presented each population has unique experiences of discrimination within the healthcare system: Aboriginal people people who inject drugs (PWID) people living with HIV (PLHIV) and gay and bisexual men (GBM). Analyses were guided by the behavioural and social determinants model that forms the basis of the World Health Organization’s “data for action: achieving high uptake of COVID-19 vaccines” interim guidance. All populations viewed vaccination as necessary for community protection, although narratives of community care were most common among Aboriginal people. Concerns about vaccine safety were expressed by all participant groups, although participants living with HIV and GBM were more trusting of vaccines possibly because of their ongoing and usually positive past experiences with biomedical technologies for HIV management and sexual health. Aboriginal participants reported distrust of mainstream government and participants who inject drugs expressed a more generalised suspicion about COVID-19 and its origins. Practical problems related to transport, booking appointments for vaccination and so forth, were more common among participants living with HIV and GBM, possibly because these specific interviews were conducted throughout 2021 when vaccines were more available, whereas data for the other populations were collected before the vaccine rollout. Findings show that vaccine willingness is shaped by past experiences of discrimination in healthcare setting, but different histories of discrimination can differently impact vaccine willingness. Promotional messaging and delivery must take account of these important differences so to not treat these populations homogenously.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA05350G
Abstract: An organic redox flow electrode in FCDI is proposed to achieve quick salt removal and low energy consumption. The energy consumption is zero using a photoanode as the driving force.
Publisher: American Scientific Publishers
Date: 04-2012
Abstract: Crystalline Co3O4 nanowire arrays freely supported on Ni foam are successfully synthesized using a template-free method. The effects of reaction time, concentration of reactants, and temperature on the morphology of the nanowires are studied. The results indicate that uniform Co3O4 nanowires could be synthesized at 90 degrees C, and a transformation of the s les' morphology from nanoparticles to nanowires to microrods is observed by controlling the concentration of the reactants. The well-ordered nanowires synthesized under the selected reaction conditions are composed of spinel Co3O4 with diameters of 500-580 nm and lengths of 6-8 microm. These nanowires show good catalytic activity for the ozone catalytic oxidation of toluene.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM33085G
Publisher: Springer Science and Business Media LLC
Date: 22-08-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA03138E
Abstract: We reported a simple and green method to fabricate various palladium (0.8, 2.17, 7.65 wt%) loaded graphene aerogel deposited on nickel foam (Pd/GA/NF) as binder-free direct electrodes for electro-oxidation of methanol and ethanol.
Publisher: Springer Science and Business Media LLC
Date: 18-09-2015
DOI: 10.1038/SREP14229
Abstract: New and novel 3D hierarchical porous graphene aerogels (HPGA) with uniform and tunable meso-pores (e.g., 21 and 53 nm) on graphene nanosheets (GNS) were prepared by a hydrothermal self-assembly process and an in-situ carbothermal reaction. The size and distribution of the meso-pores on the in idual GNS were uniform and could be tuned by controlling the sizes of the Co 3 O 4 NPs used in the hydrothermal reaction. This unique architecture of HPGA prevents the stacking of GNS and promises more electrochemically active sites that enhance the electrochemical storage level significantly. HPGA, as a lithium-ion battery anode, exhibited superior electrochemical performance, including a high reversible specific capacity of 1100 mAh/g at a current density of 0.1 A/g, outstanding cycling stability and excellent rate performance. Even at a large current density of 20 A/g, the reversible capacity was retained at 300 mAh/g, which is larger than that of most porous carbon-based anodes reported, suggesting it to be a promising candidate for energy storage. The proposed 3D HPGA is expected to provide an important platform that can promote the development of 3D topological porous systems in a range of energy storage and generation fields.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0GC01191F
Abstract: A consumption-free electrochemical desalination method is demonstrated to work based on a light-driven photocathode with a Pt/CdS/CZTS/Mo architecture.
Publisher: Wiley
Date: 11-2021
DOI: 10.1002/CEY2.155
Abstract: Aluminum–metal batteries show great potential as next‐generation energy storage due to their abundant resources and intrinsic safety. However, the crucial limitations of metallic Al anodes, such as dendrite and corrosion problems in conventional aluminum–metal batteries, remain challenging and elusive. Here, we report a novel electrodeposition strategy to prepare an optimized 3D Al anode on carbon cloth with an uniform deposition morphology, low local current density, and mitigatory volume change. The symmetrical cells with the 3D Al anode show superior stable cycling ( h) and low‐voltage hysteresis (~170 mV) at 0.5 mA cm −2 . High reversibility (~99.7%) is achieved for the Al plating/stripping. The graphite | | Al‐4/CC full batteries show a long lifespan of 800 cycles with 54 mAh g −1 capacity at a high current density of 1000 mA g −1 , benefiting from the high capacitive‐controlled distribution. This study proposes a novel strategy to design 3D Al anodes for metallic‐Al‐based batteries by eliminating the problems of planar Al anodes and realizing the potential applications of aluminum–graphite batteries.
Publisher: Wiley
Date: 31-05-2022
DOI: 10.1002/CEY2.188
Abstract: Simultaneously enhancing the reaction kinetics, mass transport, and gas release during alkaline hydrogen evolution reaction (HER) is critical to minimizing the reaction polarization resistance, but remains a big challenge. Through rational design of a hierarchical multiheterogeneous three‐dimensionally (3D) ordered macroporous Mo 2 C‐embedded nitrogen‐doped carbon with ultrafine Ru nanoclusters anchored on its surface (OMS Mo 2 C/NC‐Ru), we realize both electronic and morphologic engineering of the catalyst to maximize the electrocatalysis performance. The formed Ru‐NC heterostructure shows regulative electronic states and optimized adsorption energy with the intermediate H*, and the Mo 2 C‐NC heterostructure accelerates the Volmer reaction due to the strong water dissociation ability as confirmed by theoretical calculations. Consequently, superior HER activity in alkaline solution with an extremely low overpotential of 15.5 mV at 10 mA cm −2 with the mass activity more than 17 times higher than that of the benchmark Pt/C, an ultrasmall Tafel slope of 22.7 mV dec −1 , and excellent electrocatalytic durability were achieved, attributing to the enhanced mass transport and favorable gas release process endowed from the unique OMS Mo 2 C/NC‐Ru structure. By oxidizing OMS Mo 2 C/NC‐Ru into OMS MoO 3 ‐RuO 2 catalyst, it can also be applied as efficient oxygen evolution electrocatalyst, enabling the construction of a quasi‐symmetric electrolyzer for overall water splitting. Such a device's performance surpassed the state‐of‐the‐art Pt/C || RuO 2 electrolyzer. This study provides instructive guidance for designing 3D‐ordered macroporous multicomponent catalysts for efficient catalytic applications.
Publisher: Springer Science and Business Media LLC
Date: 11-04-2015
Publisher: Elsevier BV
Date: 10-2016
DOI: 10.1016/J.SOCSCIMED.2016.08.040
Abstract: Social capital is a valuable resource that has received little attention in the prison context. Differences in the construct and accessibility of bonding, bridging, and linking social capital exist for Aboriginal Australians in mainstream society, but were previously unexplored in prison. This study seeks to understand contextual differences of social capital for Australian Aboriginal and non-Aboriginal men in prison. Thirty male inmates participated in qualitative interviews across three New South Wales (NSW) correctional centres. Interviews were completed between November 2014 and March 2015. Experiences of bonding and linking social capital varied among Aboriginal and non-Aboriginal participants. Opportunities for bridging social capital were limited for all participants. There is greater scope for building bonding social capital among male inmates than either bridging or linking social capital. Bonding social capital, particularly among Aboriginal men in prison, should be utilised to promote health and other programs to inmates.
Publisher: Elsevier BV
Date: 2023
No related grants have been discovered for K.N. Hui.