ORCID Profile
0000-0003-1629-240X
Current Organisation
University of Toronto
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Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3EY00063J
Abstract: The emerging single-site catalysts for electrochemical CO 2 reduction have been comprehensively summarized and discussed, including their catalytic mechanisms, synthesis, optimization strategies, remaining challenges and perspectives.
Publisher: American Chemical Society (ACS)
Date: 14-07-2017
Abstract: Herein, a graphene oxide (GO)-wired manganese silicate (MS) hollow sphere (MS/GO) composite is successfully synthesized. Such an architecture possesses multiple advantages in lithium and sodium storage. The hollow MS structure provides a sufficient free space for volume variation accommodation the porous and low-crystalline features facilitate the diffusion of lithium ions meanwhile, the flexible GO sheets enhance the electronic conductivity of the composite to a certain degree. When applied as the anode material for lithium-ion batteries (LIBs), the as-obtained MS/GO composite exhibits a high reversible capacity, ultrastable cyclability, and good rate performance. Particularly, the MS/GO composite delivers a high capacity of 699 mA h g
Publisher: Wiley
Date: 10-09-2018
Abstract: Iron-nitrogen-carbon (Fe-N-C) is hitherto considered as one of the most satisfactory alternatives to platinum for the oxygen reduction reaction (ORR). Major efforts currently are devoted to the identification and maximization of carbon-enclosed FeN
Publisher: Wiley
Date: 22-08-2021
DOI: 10.1002/EEM2.12219
Abstract: Metal silicate hydroxides have been recognized as efficient oxygen evolution reaction (OER) electrocatalysts, yet tailoring of their intrinsic activity remains confused. Herein, Fe had been incorporated into cobalt silicate hydroxide nanosheets and the resulted material achieves a competitive OER catalytic activity. It is found that the doping state obviously affects the electrical transport property. Specifically, highly dispersed Fe atoms (low‐concentration Fe doping) trigger slight electron transfer to Co atoms while serried Fe (high‐concentration Fe doping) attract vast electrons. By introducing 6 at.% Fe doping, partial relatively inert Co sites are activated by atomically dispersed Fe, bearing an optimal metal 3 d electronic occupation and adsorption capacity to oxygen intermediate. The introduced Co−O−Fe unit trigger the π ‐donation effect and decrease the number of electrons in π *‐antibonding orbitals, which enhance the Fe−O covalency and the structural stability. As a result, the s le delivers a low overpotential of 293 mV to achieve a current density of 10 mA cm −2 . This work clarifies the superiority of atomically dispersed doping state, which is of fundamental interest to the design of doped catalyst.
Publisher: Springer Science and Business Media LLC
Date: 03-08-2023
DOI: 10.1038/S41467-023-40342-6
Abstract: Electrochemical conversion of CO 2 to formic acid using Bismuth catalysts is one the most promising pathways for industrialization. However, it is still difficult to achieve high formic acid production at wide voltage intervals and industrial current densities because the Bi catalysts are often poisoned by oxygenated species. Herein, we report a Bi 3 S 2 nanowire-ascorbic acid hybrid catalyst that simultaneously improves formic acid selectivity, activity, and stability at high applied voltages. Specifically, a more than 95% faraday efficiency was achieved for the formate formation over a wide potential range above 1.0 V and at ere-level current densities. The observed excellent catalytic performance was attributable to a unique reconstruction mechanism to form more defective sites while the ascorbic acid layer further stabilized the defective sites by trapping the poisoning hydroxyl groups. When used in an all-solid-state reactor system, the newly developed catalyst achieved efficient production of pure formic acid over 120 hours at 50 mA cm –2 (200 mA cell current).
Publisher: Wiley
Date: 30-01-2023
DOI: 10.1002/EEM2.12560
Abstract: The Fe–N–C material represents an attractive oxygen reduction reaction electrocatalyst, and the FeN 4 moiety has been identified as a very competitive catalytic active site. Fine tuning of the coordination structure of FeN 4 has an essential impact on the catalytic performance. Herein, we construct a sulfur‐modified Fe–N–C catalyst with controllable local coordination environment, where the Fe is coordinated with four in‐plane N and an axial external S. The external S atom affects not only the electron distribution but also the spin state of Fe in the FeN 4 active site. The appearance of higher valence states and spin states for Fe demonstrates the increase in unpaired electrons. With the above characteristics, the adsorption and desorption of the reactants at FeN 4 active sites are optimized, thus promoting the oxygen reduction reaction activity. This work explores the key point in electronic configuration and coordination environment tuning of FeN 4 through S doping and provides new insight into the construction of M–N–C‐based oxygen reduction reaction catalysts.
Publisher: Elsevier BV
Date: 04-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA03565C
Abstract: Enriching the interface: metal–organic framework-derived copper oxide nanowires with abundant crystalline interfaces contribute to the efficient electrochemical CO 2 reduction towards fast hydrocarbon generation.
Publisher: American Chemical Society (ACS)
Date: 11-08-2020
Publisher: American Chemical Society (ACS)
Date: 09-08-2022
DOI: 10.1021/JACS.2C03982
Publisher: American Chemical Society (ACS)
Date: 23-03-2020
Publisher: American Chemical Society (ACS)
Date: 14-05-2018
Abstract: Sodium-ion batteries (SIBs) are considered as one of the most favorable alternative devices for sustainable development of modern society. However, it is still a big challenge to search for proper anode materials which have excellent cycling and rate performance. Here, zinc selenide microsphere and multiwalled carbon nanotube (ZnSe/MWCNT) composites are prepared via hydrothermal reaction and following grinding process. The performance of ZnSe/MWCNT composites as a SIB anode is studied for the first time. As a result, ZnSe/MWCNTs exhibit excellent rate capacity and superior cycling life. The capacity retains as high as 382 mA h g
Publisher: The Electrochemical Society
Date: 03-11-2017
DOI: 10.1149/2.0151701JES
Publisher: American Chemical Society (ACS)
Date: 04-12-2019
Publisher: American Chemical Society (ACS)
Date: 17-08-2021
Publisher: Wiley
Date: 23-11-2018
No related grants have been discovered for Jiexin Zhu.