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Carbon Nanotube Supported Molybdenum Carbide as Robust Electrocatalyst for Efficient Hydrogen Evolution Reaction
Molybdenum carbide is considered to be one of the most competitive catalysts for hydrogen evolution reaction (HER) regarding its high catalytic activity and superior corrosion resistance. But the low electrical conductivity and poor interfacial contact with the current collector greatly inhibit its...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9822247/ https://www.ncbi.nlm.nih.gov/pubmed/36615386 http://dx.doi.org/10.3390/molecules28010192 |
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author | Huang, Yunjie Bao, Yaqi Huang, Tieqi Hu, Chengzhi Qiu, Haiou Liu, Hongtao |
author_facet | Huang, Yunjie Bao, Yaqi Huang, Tieqi Hu, Chengzhi Qiu, Haiou Liu, Hongtao |
author_sort | Huang, Yunjie |
collection | PubMed |
description | Molybdenum carbide is considered to be one of the most competitive catalysts for hydrogen evolution reaction (HER) regarding its high catalytic activity and superior corrosion resistance. But the low electrical conductivity and poor interfacial contact with the current collector greatly inhibit its practical application capability. Herein, carbon nanotube (CNT) supported molybdenum carbide was assembled via electrostatic adsorption combined with complex bonding. The N-doped molybdenum carbide nanocrystals were uniformly anchored on the surfaces of amino CNTs, which depressed the agglomeration of nanoparticles while strengthening the migration of electrons. The optimized catalyst (250-800-2h) showed exceptional electrocatalytic performance towards HER under both acidic and alkaline conditions. Especially in 0.5 M H(2)SO(4) solution, the 250-800-2h catalyst exhibited a low overpotential of 136 mV at a current density of 10 mA/cm(2) (η(10)) with the Tafel slope of 49.9 mV dec(−1), and the overpotential only increased 8 mV after 20,000 cycles of stability test. The active corrosive experiment revealed that more exposure to high-activity γ-Mo(2)N promoted the specific mass activity of Mo, thus, maintaining the catalytic durability of the catalyst. |
format | Online Article Text |
id | pubmed-9822247 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-98222472023-01-07 Carbon Nanotube Supported Molybdenum Carbide as Robust Electrocatalyst for Efficient Hydrogen Evolution Reaction Huang, Yunjie Bao, Yaqi Huang, Tieqi Hu, Chengzhi Qiu, Haiou Liu, Hongtao Molecules Communication Molybdenum carbide is considered to be one of the most competitive catalysts for hydrogen evolution reaction (HER) regarding its high catalytic activity and superior corrosion resistance. But the low electrical conductivity and poor interfacial contact with the current collector greatly inhibit its practical application capability. Herein, carbon nanotube (CNT) supported molybdenum carbide was assembled via electrostatic adsorption combined with complex bonding. The N-doped molybdenum carbide nanocrystals were uniformly anchored on the surfaces of amino CNTs, which depressed the agglomeration of nanoparticles while strengthening the migration of electrons. The optimized catalyst (250-800-2h) showed exceptional electrocatalytic performance towards HER under both acidic and alkaline conditions. Especially in 0.5 M H(2)SO(4) solution, the 250-800-2h catalyst exhibited a low overpotential of 136 mV at a current density of 10 mA/cm(2) (η(10)) with the Tafel slope of 49.9 mV dec(−1), and the overpotential only increased 8 mV after 20,000 cycles of stability test. The active corrosive experiment revealed that more exposure to high-activity γ-Mo(2)N promoted the specific mass activity of Mo, thus, maintaining the catalytic durability of the catalyst. MDPI 2022-12-26 /pmc/articles/PMC9822247/ /pubmed/36615386 http://dx.doi.org/10.3390/molecules28010192 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Communication Huang, Yunjie Bao, Yaqi Huang, Tieqi Hu, Chengzhi Qiu, Haiou Liu, Hongtao Carbon Nanotube Supported Molybdenum Carbide as Robust Electrocatalyst for Efficient Hydrogen Evolution Reaction |
title | Carbon Nanotube Supported Molybdenum Carbide as Robust Electrocatalyst for Efficient Hydrogen Evolution Reaction |
title_full | Carbon Nanotube Supported Molybdenum Carbide as Robust Electrocatalyst for Efficient Hydrogen Evolution Reaction |
title_fullStr | Carbon Nanotube Supported Molybdenum Carbide as Robust Electrocatalyst for Efficient Hydrogen Evolution Reaction |
title_full_unstemmed | Carbon Nanotube Supported Molybdenum Carbide as Robust Electrocatalyst for Efficient Hydrogen Evolution Reaction |
title_short | Carbon Nanotube Supported Molybdenum Carbide as Robust Electrocatalyst for Efficient Hydrogen Evolution Reaction |
title_sort | carbon nanotube supported molybdenum carbide as robust electrocatalyst for efficient hydrogen evolution reaction |
topic | Communication |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9822247/ https://www.ncbi.nlm.nih.gov/pubmed/36615386 http://dx.doi.org/10.3390/molecules28010192 |
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