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WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution

Single-atom catalysts anchored to oxide or carbonaceous substances are typically tightly coordinated by oxygen or heteroatoms, which certainly impact their electronic structure and coordination environment, thereby affecting their catalytic activity. In this study, we prepared a stable oxygen evolut...

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Detalles Bibliográficos
Autores principales: Bai, Jirong, Deng, Yaoyao, Lian, Yuebin, Zhou, Quanfa, Zhang, Chunyong, Su, Yaqiong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10609438/
https://www.ncbi.nlm.nih.gov/pubmed/37894519
http://dx.doi.org/10.3390/molecules28207040
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author Bai, Jirong
Deng, Yaoyao
Lian, Yuebin
Zhou, Quanfa
Zhang, Chunyong
Su, Yaqiong
author_facet Bai, Jirong
Deng, Yaoyao
Lian, Yuebin
Zhou, Quanfa
Zhang, Chunyong
Su, Yaqiong
author_sort Bai, Jirong
collection PubMed
description Single-atom catalysts anchored to oxide or carbonaceous substances are typically tightly coordinated by oxygen or heteroatoms, which certainly impact their electronic structure and coordination environment, thereby affecting their catalytic activity. In this study, we prepared a stable oxygen evolution reaction (OER) catalyst on tungsten carbide using a simple pyrolysis method. The unique structure of tungsten carbide allows the atomic RuNi catalytic site to weakly bond to the surface W and C atoms. XRD patterns and HRTEM images of the WCx-RuNi showed the characteristics of phase-pure WC and W(2)C, and the absence of nanoparticles. Combined with XPS, the atomic dispersion of Ru/Ni in the catalyst was confirmed. The catalyst exhibits excellent catalytic ability, with a low overpotential of 330 mV at 50 mA/cm(2) in 1 m KOH solutions, and demonstrates high long-term stability. This high OER activity is ascribed to the synergistic action of metal Ru/Ni atoms with double monomers. The addition of Ni increases the state density of WCx-RuNi near the Fermi level, promoting the adsorption of oxygen-containing intermediates and enhancing electron exchange. The larger proximity of the d band center to the Fermi level suggests a strong interaction between the d electrons and the valence or conduction band, facilitating charge transfer. Our research offers a promising avenue for reasonable utilization of inexpensive and durable WCx carrier-supported metal single-atom catalysts for electrochemical catalysis.
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spelling pubmed-106094382023-10-28 WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution Bai, Jirong Deng, Yaoyao Lian, Yuebin Zhou, Quanfa Zhang, Chunyong Su, Yaqiong Molecules Communication Single-atom catalysts anchored to oxide or carbonaceous substances are typically tightly coordinated by oxygen or heteroatoms, which certainly impact their electronic structure and coordination environment, thereby affecting their catalytic activity. In this study, we prepared a stable oxygen evolution reaction (OER) catalyst on tungsten carbide using a simple pyrolysis method. The unique structure of tungsten carbide allows the atomic RuNi catalytic site to weakly bond to the surface W and C atoms. XRD patterns and HRTEM images of the WCx-RuNi showed the characteristics of phase-pure WC and W(2)C, and the absence of nanoparticles. Combined with XPS, the atomic dispersion of Ru/Ni in the catalyst was confirmed. The catalyst exhibits excellent catalytic ability, with a low overpotential of 330 mV at 50 mA/cm(2) in 1 m KOH solutions, and demonstrates high long-term stability. This high OER activity is ascribed to the synergistic action of metal Ru/Ni atoms with double monomers. The addition of Ni increases the state density of WCx-RuNi near the Fermi level, promoting the adsorption of oxygen-containing intermediates and enhancing electron exchange. The larger proximity of the d band center to the Fermi level suggests a strong interaction between the d electrons and the valence or conduction band, facilitating charge transfer. Our research offers a promising avenue for reasonable utilization of inexpensive and durable WCx carrier-supported metal single-atom catalysts for electrochemical catalysis. MDPI 2023-10-12 /pmc/articles/PMC10609438/ /pubmed/37894519 http://dx.doi.org/10.3390/molecules28207040 Text en © 2023 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
Bai, Jirong
Deng, Yaoyao
Lian, Yuebin
Zhou, Quanfa
Zhang, Chunyong
Su, Yaqiong
WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution
title WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution
title_full WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution
title_fullStr WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution
title_full_unstemmed WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution
title_short WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution
title_sort wcx-supported runi single atoms for electrocatalytic oxygen evolution
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10609438/
https://www.ncbi.nlm.nih.gov/pubmed/37894519
http://dx.doi.org/10.3390/molecules28207040
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AT zhouquanfa wcxsupportedrunisingleatomsforelectrocatalyticoxygenevolution
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