Enhanced oxygen and hydrogen evolution reaction by zinc doping in cobalt–nickel sulfide heteronanorods

Abstract Developing highly efficient electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) is critical to enable electrical‐to‐hydrogen energy conversion technologies to reality. Herein, zinc‐doped cobalt sulfide‐modified nickel sulfide (ZCNS) heteronanor...

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Autores principales:	Jing Du, Zehua Zou, Cailing Xu
Formato:	article
Lenguaje:	EN
Publicado:	Wiley-VCH 2021
Materias:	electrocatalyst heteronanorods hydrogen evolution oxygen evolution sulfides Industrial electrochemistry TP250-261 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/ae122fe80cba4fbfa6950fcc217a1c97
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spelling	oai:doaj.org-article:ae122fe80cba4fbfa6950fcc217a1c972021-11-23T18:05:25ZEnhanced oxygen and hydrogen evolution reaction by zinc doping in cobalt–nickel sulfide heteronanorods2698-597710.1002/elsa.202000038https://doaj.org/article/ae122fe80cba4fbfa6950fcc217a1c972021-11-01T00:00:00Zhttps://doi.org/10.1002/elsa.202000038https://doaj.org/toc/2698-5977Abstract Developing highly efficient electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) is critical to enable electrical‐to‐hydrogen energy conversion technologies to reality. Herein, zinc‐doped cobalt sulfide‐modified nickel sulfide (ZCNS) heteronanorod hybrid electrocatalysts are prepared through a facile hydrothermal method to enhance the electrocatalytic performance of cobalt‐nickel sulfide. The doping of Zn optimizes the electronic structure of cobalt‐nickel sulfide thus improving the conductivity and charge transfer ability of cobalt‐nickel sulfide. In addition, benefiting from the hierarchical structure of one‐dimensional nanorods and three‐dimensional Ni foam, abundant catalytically active sites and fast ion and charge transportation are obtained. As a result, the optimal zinc doped cobalt‐nickel sulfide hybrid presents overpotentials of 138 and 235 mV to achieve a current density of 10 mA/cm2 in 1.0 M KOH for HER and OER, respectively. Assembled as an electrolyzer for overall water splitting using the heteronanorod hybrids as both anode and cathode catalysts, the low cell voltage of 1.56 V at 10 mA/cm2 is achieved, which is similar to that of the IrO2‐Pt/C couple.Jing DuZehua ZouCailing XuWiley-VCHarticleelectrocatalystheteronanorodshydrogen evolutionoxygen evolutionsulfidesIndustrial electrochemistryTP250-261ChemistryQD1-999ENElectrochemical Science Advances, Vol 1, Iss 4, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electrocatalyst heteronanorods hydrogen evolution oxygen evolution sulfides Industrial electrochemistry TP250-261 Chemistry QD1-999
spellingShingle	electrocatalyst heteronanorods hydrogen evolution oxygen evolution sulfides Industrial electrochemistry TP250-261 Chemistry QD1-999 Jing Du Zehua Zou Cailing Xu Enhanced oxygen and hydrogen evolution reaction by zinc doping in cobalt–nickel sulfide heteronanorods
description	Abstract Developing highly efficient electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) is critical to enable electrical‐to‐hydrogen energy conversion technologies to reality. Herein, zinc‐doped cobalt sulfide‐modified nickel sulfide (ZCNS) heteronanorod hybrid electrocatalysts are prepared through a facile hydrothermal method to enhance the electrocatalytic performance of cobalt‐nickel sulfide. The doping of Zn optimizes the electronic structure of cobalt‐nickel sulfide thus improving the conductivity and charge transfer ability of cobalt‐nickel sulfide. In addition, benefiting from the hierarchical structure of one‐dimensional nanorods and three‐dimensional Ni foam, abundant catalytically active sites and fast ion and charge transportation are obtained. As a result, the optimal zinc doped cobalt‐nickel sulfide hybrid presents overpotentials of 138 and 235 mV to achieve a current density of 10 mA/cm2 in 1.0 M KOH for HER and OER, respectively. Assembled as an electrolyzer for overall water splitting using the heteronanorod hybrids as both anode and cathode catalysts, the low cell voltage of 1.56 V at 10 mA/cm2 is achieved, which is similar to that of the IrO2‐Pt/C couple.
format	article
author	Jing Du Zehua Zou Cailing Xu
author_facet	Jing Du Zehua Zou Cailing Xu
author_sort	Jing Du
title	Enhanced oxygen and hydrogen evolution reaction by zinc doping in cobalt–nickel sulfide heteronanorods
title_short	Enhanced oxygen and hydrogen evolution reaction by zinc doping in cobalt–nickel sulfide heteronanorods
title_full	Enhanced oxygen and hydrogen evolution reaction by zinc doping in cobalt–nickel sulfide heteronanorods
title_fullStr	Enhanced oxygen and hydrogen evolution reaction by zinc doping in cobalt–nickel sulfide heteronanorods
title_full_unstemmed	Enhanced oxygen and hydrogen evolution reaction by zinc doping in cobalt–nickel sulfide heteronanorods
title_sort	enhanced oxygen and hydrogen evolution reaction by zinc doping in cobalt–nickel sulfide heteronanorods
publisher	Wiley-VCH
publishDate	2021
url	https://doaj.org/article/ae122fe80cba4fbfa6950fcc217a1c97
work_keys_str_mv	AT jingdu enhancedoxygenandhydrogenevolutionreactionbyzincdopingincobaltnickelsulfideheteronanorods AT zehuazou enhancedoxygenandhydrogenevolutionreactionbyzincdopingincobaltnickelsulfideheteronanorods AT cailingxu enhancedoxygenandhydrogenevolutionreactionbyzincdopingincobaltnickelsulfideheteronanorods
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Enhanced oxygen and hydrogen evolution reaction by zinc doping in cobalt–nickel sulfide heteronanorods

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