Tungsten Carbide Hollow Microspheres with Robust and Stable Electrocatalytic Activity toward Hydrogen Evolution Reaction

[Image: see text] Here, we report a stable tungsten carbide hollow microsphere (W(2)C-HS) electrocatalyst with robust electrocatalytic activity toward hydrogen evolution reaction fabricated from carburization of tungsten oxides at 700 °C with CH(4)/H(2) flow, which demands overpotentials of 153 and...

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Autores principales: Ling, Ying, Luo, Fang, Zhang, Quan, Qu, Konggang, Guo, Long, Hu, Hao, Yang, Zehui, Cai, Weiwei, Cheng, Hansong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6648149/
https://www.ncbi.nlm.nih.gov/pubmed/31459628
http://dx.doi.org/10.1021/acsomega.8b03449
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author Ling, Ying
Luo, Fang
Zhang, Quan
Qu, Konggang
Guo, Long
Hu, Hao
Yang, Zehui
Cai, Weiwei
Cheng, Hansong
author_facet Ling, Ying
Luo, Fang
Zhang, Quan
Qu, Konggang
Guo, Long
Hu, Hao
Yang, Zehui
Cai, Weiwei
Cheng, Hansong
author_sort Ling, Ying
collection PubMed
description [Image: see text] Here, we report a stable tungsten carbide hollow microsphere (W(2)C-HS) electrocatalyst with robust electrocatalytic activity toward hydrogen evolution reaction fabricated from carburization of tungsten oxides at 700 °C with CH(4)/H(2) flow, which demands overpotentials of 153 and 264 mV to deliver 10 and 100 mA cm(–2) ascribing to the hollow structures beneficial for interfacial charge transfer as well as releasing of hydrogen molecular. Meanwhile, the W(2)C-HS electrocatalyst exhibits undetectable degradation after 20 000 potential cycles indicative of extraordinary durability; in contrast, overpotential@100 mA cm(–2) is dramatically increased from 128 to 251 mV after only 2000 potential cycles for benchmark platinum electrocatalyst.
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spelling pubmed-66481492019-08-27 Tungsten Carbide Hollow Microspheres with Robust and Stable Electrocatalytic Activity toward Hydrogen Evolution Reaction Ling, Ying Luo, Fang Zhang, Quan Qu, Konggang Guo, Long Hu, Hao Yang, Zehui Cai, Weiwei Cheng, Hansong ACS Omega [Image: see text] Here, we report a stable tungsten carbide hollow microsphere (W(2)C-HS) electrocatalyst with robust electrocatalytic activity toward hydrogen evolution reaction fabricated from carburization of tungsten oxides at 700 °C with CH(4)/H(2) flow, which demands overpotentials of 153 and 264 mV to deliver 10 and 100 mA cm(–2) ascribing to the hollow structures beneficial for interfacial charge transfer as well as releasing of hydrogen molecular. Meanwhile, the W(2)C-HS electrocatalyst exhibits undetectable degradation after 20 000 potential cycles indicative of extraordinary durability; in contrast, overpotential@100 mA cm(–2) is dramatically increased from 128 to 251 mV after only 2000 potential cycles for benchmark platinum electrocatalyst. American Chemical Society 2019-02-26 /pmc/articles/PMC6648149/ /pubmed/31459628 http://dx.doi.org/10.1021/acsomega.8b03449 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Ling, Ying
Luo, Fang
Zhang, Quan
Qu, Konggang
Guo, Long
Hu, Hao
Yang, Zehui
Cai, Weiwei
Cheng, Hansong
Tungsten Carbide Hollow Microspheres with Robust and Stable Electrocatalytic Activity toward Hydrogen Evolution Reaction
title Tungsten Carbide Hollow Microspheres with Robust and Stable Electrocatalytic Activity toward Hydrogen Evolution Reaction
title_full Tungsten Carbide Hollow Microspheres with Robust and Stable Electrocatalytic Activity toward Hydrogen Evolution Reaction
title_fullStr Tungsten Carbide Hollow Microspheres with Robust and Stable Electrocatalytic Activity toward Hydrogen Evolution Reaction
title_full_unstemmed Tungsten Carbide Hollow Microspheres with Robust and Stable Electrocatalytic Activity toward Hydrogen Evolution Reaction
title_short Tungsten Carbide Hollow Microspheres with Robust and Stable Electrocatalytic Activity toward Hydrogen Evolution Reaction
title_sort tungsten carbide hollow microspheres with robust and stable electrocatalytic activity toward hydrogen evolution reaction
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6648149/
https://www.ncbi.nlm.nih.gov/pubmed/31459628
http://dx.doi.org/10.1021/acsomega.8b03449
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