Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction

Abstract Electron density modulation is of great importance in an attempt to achieve highly active electrocatalysts for the oxygen evolution reaction (OER). Here, the successful construction of CuO@CoOOH p‐n heterojunction (i.e., p‐type CuO and n‐type CoOOH) nanoarray electrocatalyst through an in s...

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Autores principales:	Jing Hu, Adel Al‐Salihy, Jing Wang, Xue Li, Yanfei Fu, Zhonghua Li, Xijiang Han, Bo Song, Ping Xu
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	electrocatalysis interface charge transfer and redistribution oxygen evolution reaction p‐n heterojunction Science Q
Acceso en línea:	https://doaj.org/article/2f71de25044e4594b966f17795a87904
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spelling	oai:doaj.org-article:2f71de25044e4594b966f17795a879042021-11-17T08:40:31ZImproved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction2198-384410.1002/advs.202103314https://doaj.org/article/2f71de25044e4594b966f17795a879042021-11-01T00:00:00Zhttps://doi.org/10.1002/advs.202103314https://doaj.org/toc/2198-3844Abstract Electron density modulation is of great importance in an attempt to achieve highly active electrocatalysts for the oxygen evolution reaction (OER). Here, the successful construction of CuO@CoOOH p‐n heterojunction (i.e., p‐type CuO and n‐type CoOOH) nanoarray electrocatalyst through an in situ anodic oxidation of CuO@CoSx on copper foam is reported. The p‐n heterojunction can remarkably modify the electronic properties of the space‐charge region and facilitate the electron transfer. Moreover, in situ Raman study reveals the generation of SO42− from CoSx oxidation, and electron cloud density distribution and density functional theory calculation suggest that surface‐adsorbed SO42− can facilitate the OER process by enhancing the adsorption of OH−. The positively charged CoOOH in the space‐charge region can significantly enhance the OER activity. As a result, the CuO@CoOOH p‐n heterojunction shows significantly enhanced OER performance with a low overpotential of 186 mV to afford a current density of 10 mA cm−2. The successful preparation of a large scale (14 × 25 cm2) sample demonstrates the possibility of promoting the catalyst to industrial‐scale production. This study offers new insights into the design and fabrication of non‐noble metal‐based p‐n heterojunction electrocatalysts as effective catalytic materials for energy storage and conversion.Jing HuAdel Al‐SalihyJing WangXue LiYanfei FuZhonghua LiXijiang HanBo SongPing XuWileyarticleelectrocatalysisinterface charge transfer and redistributionoxygen evolution reactionp‐n heterojunctionScienceQENAdvanced Science, Vol 8, Iss 22, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electrocatalysis interface charge transfer and redistribution oxygen evolution reaction p‐n heterojunction Science Q
spellingShingle	electrocatalysis interface charge transfer and redistribution oxygen evolution reaction p‐n heterojunction Science Q Jing Hu Adel Al‐Salihy Jing Wang Xue Li Yanfei Fu Zhonghua Li Xijiang Han Bo Song Ping Xu Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction
description	Abstract Electron density modulation is of great importance in an attempt to achieve highly active electrocatalysts for the oxygen evolution reaction (OER). Here, the successful construction of CuO@CoOOH p‐n heterojunction (i.e., p‐type CuO and n‐type CoOOH) nanoarray electrocatalyst through an in situ anodic oxidation of CuO@CoSx on copper foam is reported. The p‐n heterojunction can remarkably modify the electronic properties of the space‐charge region and facilitate the electron transfer. Moreover, in situ Raman study reveals the generation of SO42− from CoSx oxidation, and electron cloud density distribution and density functional theory calculation suggest that surface‐adsorbed SO42− can facilitate the OER process by enhancing the adsorption of OH−. The positively charged CoOOH in the space‐charge region can significantly enhance the OER activity. As a result, the CuO@CoOOH p‐n heterojunction shows significantly enhanced OER performance with a low overpotential of 186 mV to afford a current density of 10 mA cm−2. The successful preparation of a large scale (14 × 25 cm2) sample demonstrates the possibility of promoting the catalyst to industrial‐scale production. This study offers new insights into the design and fabrication of non‐noble metal‐based p‐n heterojunction electrocatalysts as effective catalytic materials for energy storage and conversion.
format	article
author	Jing Hu Adel Al‐Salihy Jing Wang Xue Li Yanfei Fu Zhonghua Li Xijiang Han Bo Song Ping Xu
author_facet	Jing Hu Adel Al‐Salihy Jing Wang Xue Li Yanfei Fu Zhonghua Li Xijiang Han Bo Song Ping Xu
author_sort	Jing Hu
title	Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction
title_short	Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction
title_full	Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction
title_fullStr	Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction
title_full_unstemmed	Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction
title_sort	improved interface charge transfer and redistribution in cuo‐coooh p‐n heterojunction nanoarray electrocatalyst for enhanced oxygen evolution reaction
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/2f71de25044e4594b966f17795a87904
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Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction

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