Efficient electrocatalysts with strong core-shell interaction for water splitting: The modulation of selectivity and activity

作者全名："Li, Xiaolin; Zhang, Chi; Qing, Min; Chen, Da; Wang, Xiao Hu; Li, Rui; Li, Bang Lin; Luo, Hong Qun; Li, Nian Bing; Liu, Wen"

作者地址："[Li, Xiaolin; Zhang, Chi; Chen, Da; Wang, Xiao Hu; Li, Rui; Li, Bang Lin; Luo, Hong Qun; Li, Nian Bing] Southwest Univ, Sch Chem & Chem Engn, Chongqing 400715, Peoples R China; [Qing, Min] Chongqing Med Univ, Coll Pharm, Chongqing 400016, Peoples R China; [Liu, Wen] Beijing Univ Chem Technol, Coll Energy, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China; [Liu, Wen] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China"

通信作者："Li, XL; Li, NB (通讯作者)，Southwest Univ, Sch Chem & Chem Engn, Chongqing 400715, Peoples R China.; Liu, W (通讯作者)，Beijing Univ Chem Technol, Coll Energy, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China.; Liu, W (通讯作者)，Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China."

来源：JOURNAL OF ALLOYS AND COMPOUNDS

ESI学科分类：MATERIALS SCIENCE

WOS号：WOS:000868911100001

JCR分区：Q1

影响因子：6.2

年份：2022

卷号：929

期号：　

开始页：　

结束页：　

文献类型：Article

关键词：Core-shell structure; Electronic interaction; Modulation; Hydrogen evolution reaction; Oxygen evolution reaction

摘要："Optimum of electrocatalysts plays a key role in the design and development of cost-effective and en-vironmentally benign technologies for energy conversion and storage. In this work, we study two kinds of core-shell structured electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in acid and alkali electrolyte. The electrocatalyst of cobalt@cobalt phosphide nanoparticles is grown on carbon nanotubes (Co@CoP/CNT) and shows a current density of 10 mA cm-2 at an overpotential of 67 mV in acid and 125 mV in alkali, demonstrating the strong metal-metal phosphide interaction facil-itating hydrogen reduction. However, the in situ formed cobalt@cobalt oxide (Co@Co3O4/CNT) electro-catalysts from the Co@CoP/CNT can retard both the HER and OER performances through the metal-metal oxide interaction. The underlying mechanisms of the activity and selectivity of the core-shell catalysts towards water splitting reactions is further unveiled by density functional theory (DFT) simulation. The different catalytic behaviors of the core-shell structured catalysts in HER and OER are attributed to the different interactions between the metallic cores, shells and the adsorbed intermediate species. This study not only promises a facile and general strategy to fabricate high performance electrocatalysts but also sheds new light on crucial design principles of catalyst materials for intermediate-selective electrocatalytic reactions.(c) 2022 Elsevier B.V. All rights reserved."

基金机构："General Project of Chongqing Natural Science Foundation [cstc2021jcyj-msxmX1182]; Southwest University Teaching Reform Project [2021JY023]; Beijing University of Chemical Technology [buctrc201901]; National Natural Science Foundation of China and Ministry of Foreign Affairs and International Cooperation, Italy [NSFC-MAECI 51861135202]"

基金资助正文："This work was supported by General Project of Chongqing Natural Science Foundation, (cstc2021jcyj-msxmX1182), China, and Southwest University Teaching Reform Project (2021JY023), China, Beijing University of Chemical Technology (buctrc201901), National Natural Science Foundation of China and Ministry of Foreign Affairs and International Cooperation, Italy (NSFC-MAECI 51861135202). The authors are grateful for the kind help and insightful discussions provided by Prof. Hailiang Wang from Yale University, New Haven, CT 06511, United States of America."