ORCID Profile
0000-0003-0652-4545
Current Organisation
Nanyang Technological University
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Publisher: Elsevier BV
Date: 02-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA05559B
Abstract: We prepared carbon dots (CDs) via a sustainable, low-cost synthetic route employing eggplant biomass.
Publisher: Wiley
Date: 06-08-2018
Publisher: American Chemical Society (ACS)
Date: 17-10-2022
Publisher: Elsevier BV
Date: 04-2019
Publisher: IOP Publishing
Date: 12-05-2021
Abstract: The discovery of monolayered black phosphorus (phosphorene) in 2014 gives rise to enormous research enthusiasm for its unique electrical and physicochemical properties. Since then, the applications of black phosphorus and its nanostructures have been extended to various fields covering field effect transistors, rechargeable batteries, electrocatalysis, sensors, thermoelectric materials, and so forth. However, controllable and scalable synthesis of BP and its nanostructures remains a challenge. In this review, we provide a state-of-the-art overview of the progress towards the synthesis of bulk BP and its typical nanostructured counterparts, including the 0D BP (quantum dots), 1D BP (nano/micro-belts), 2D BP (phosphorene), and 3D BP (sponges). Special focus will be made on the various synthetic methods, the characterizations of products, and the corresponding necessary improvements. We close the review with a look at the challenges and perspectives regarding future studies.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0QM00577K
Abstract: A comprehensive overview of the latest progress of vanadium-based nanomaterials and the challenges and prospects for zinc ion batteries are reviewed.
Publisher: Elsevier BV
Date: 08-2019
Publisher: Wiley
Date: 18-03-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2ME00259K
Abstract: The interpenetrating 2D-sheet framework of Co-TMBT-MOF cast onto nickel foam is used as a pre-catalyst to generate an efficient OER catalyst with low overpotential.
Publisher: Wiley
Date: 04-2020
Publisher: Wiley
Date: 29-09-2022
Abstract: Studies of the ammonia oxidation reaction (AOR) for the synthesis of nitrite and nitrate (NO 2/3 − ) have been limited to a small number of catalytic materials, majorly Pt based. As the demand for nitrate‐based products such as fertilisers continues to grow, exploration of alternative catalysts is needed. Herein, 19 metals immobilised as particles on carbon fibre electrodes were tested for their catalytic activity for the ammonia electrooxidation to NO 2/3 − under alkaline conditions (0.1 m KOH). Nickel‐based electrodes showed the highest overall NO 2/3 − yield with a rate of 5.0±1.0 nmol s −1 cm −2 , to which nitrate contributed 62±8 %. Cu was the only catalyst that enabled formation of nitrate, at a rate of 1.0±0.4 nmol s −1 cm −2 , with undetectable amounts of nitrite produced. Previously unexplored in this context, Fe and Ag also showed promise and provided new insights into the mechanisms of the process. Ag‐based electrodes showed strong indications of activity towards NH 3 oxidation in electrochemical measurements but produced relatively low NO 2/3 − yields, suggesting the formation of alternate oxidation products. NO 2/3 − production over Fe‐based electrodes required the presence of dissolved O 2 and was more efficient than with Ni on longer timescales. These results highlight the complexity of the AOR mechanism and provide a broad set of catalytic activity and nitrate versus nitrite yield data, which might guide future development of a practical process for the distributed sustainable production of nitrates and nitrites at low and medium scales.
Publisher: Wiley
Date: 27-01-2020
Abstract: Herein, the facile preparation of ultrathin (≈3.8 nm in thickness) 2D cobalt phosphate (CoPi) nanoflakes through an oil-phase method is reported. The obtained nanoflakes are composed of highly ordered mesoporous (≈3.74 nm in diameter) structure and exhibit an amorphous nature. Attractively, when doped with nickel, such 2D mesoporous Ni-doped CoPi nanoflakes display decent electrocatalytic performances in terms of intrinsic activity, and low kinetic barrier toward the oxygen evolution reaction (OER). Particularly, the optimized 10 at% Ni-doped CoPi nanoflakes (denoted as Ni10-CoPi) deliver a low overpotential at 10 mA cm
Publisher: Wiley
Date: 23-09-2022
Abstract: High intrinsic activity of oxygen evolution reaction (OER) catalysts is often limited by their low electrical conductivity. To address this, we introduce copper inverse opal (IO) frameworks offering a well‐developed network of interconnected pores as highly conductive high‐surface‐area supports for thin catalytic coatings, for ex le, the extremely active but poorly conducting nickel‐iron layered double hydroxides (NiFe LDH). Such composites exhibit significantly higher OER activity in 1 m KOH than NiFe LDH supported on a flat substrate or deposited as inverse opals. The NiFe LDH/Cu IO catalyst enables oxygen evolution rates of 100 mA cm −2 (727±4 A g catalyst −1 ) at an overpotential of 0.305±0.003 V with a Tafel slope of 0.044±0.002 V dec −1 . This high performance is achieved with 2.2±0.4 μm catalyst layers, suggesting compatibility of the inverse‐opal‐supported catalysts with membrane electrolyzers, in contrast to similarly performing 10 3 ‐fold thicker electrodes based on foams and other substrates.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2EE03901J
Abstract: Proton transfer is a key step of the lithium-mediated electrochemical reduction of nitrogen to ammonia. Herein, we investigate the impact of the chemical nature of the proton carrier on the performance and highlight shuttles that enable effective ammonia synthesis.
Publisher: Wiley
Date: 05-04-2019
Abstract: Presented are the theoretical calculation and experimental studies of a Ti 3 C 2 T x MXene‐based nanohybrid with simultaneous Nb doping and surface transition metal alloy modification. Guided by the density functional theory calculation, the Nb doping can move up the Fermi energy level to the conduction band, thus enhancing the electronic conductivity. Meanwhile, the surface modification by Ni/Co alloy can moderate the surface M–H affinity, which will further enhance the hydrogen evolution reaction (HER) activity. A series of Ni/Co alloy attached on Nb‐doped Ti 3 C 2 T x MXene nanohybrids (denoted as NiCo@NTM) are successfully prepared. As expected, the Ni 0.9 Co 0.1 @ NTM nanohybrids present an extraordinary HER activity in alkaline solution, which only needs an overpotential (η) of 43.4 mV to reach the current density of 10 mA cm −2 in 1 m KOH solution and shows good stability. The performance of the Ni 0.9 Co 0.1 @ NTM nanohybrids is comparable to the commercial 10% Pt/C electrode (34.4 mV@10 mA cm −2 ) and is better than most state‐of‐the‐art Pt‐free HER catalysts. Inspired by the facile synthesis process and chemical versatility of both MXene and transition metal alloys, the nanohybrids reported here are promising non‐noble metal electrocatalysts for water–alkali electrolysis.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9TA13651G
Abstract: A dual-functional metal template achieves on-demand control of metal–N–C sites, porous structures, and surface wettability in a carbon nanofiber catalyst, enabling flexible zinc–air batteries with outstanding performance under various mechanical deformations.
No related grants have been discovered for Khang Ngoc Dinh.