In-situ formed NiS/Ni coupled interface for efficient oxygen evolution and hydrogen evolution

作     者：Chaoyi Yan Jianwen Huang Chunyang Wu Yaoyao Li Yuchuan Tan Luying Zhang Yinghui Sun Xiaona Huang Jie Xiong Chaoyi Yan;Jianwen Huang;Chunyang Wu;Yaoyao Li;Yuchuan Tan;Luying Zhang;Yinghui Sun;Xiaona Huang;Jie Xiong

作者机构：State Key Laboratory of Electronic Thin Film and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengdu610054China Chengdu Technological UniversityChengdu611730China Soochow Institute for Energy and Materials InnovationS&Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou215006China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第42卷第7期

页      面：10-16页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was financailly supported by the National Natural Science Foundation of China(Nos.51722204 and 51802145) the National Key Basic Research Program of China(No.2014CB931702) the Sichuan Science and Technology Program(Nos.2018RZ0082 and 2019JDRC0070) the Fundamental Research Fund for the Central Universities(No.A03018023801053) the Open Project of Jiangsu Key Laboratory for Carbon-Based Functional Materials Devices at Soochow University(No.KJS1807) 

主　　题：Water splitting Interface construction Electrocatalyst Bifunctional In-situ synthesis 

摘      要：High-performance electrocatalysts for water splitting are desired due to the urgent requirement of clean and sustainable hydrogen *** reduce the energy barrier,herein,we adopt a facile in-situ surface modification strategy to develop a low-cost and efficient electrocatalyst for water *** synthesized mulberry-like NiS/Ni nanoparticles exhibit excellent catalytic performance for water *** overpotentials of 301 and 161 mV are needed to drive the current density of 10 mA cm^-2 accompanying with remarkably low Tafel slopes of 46 and 74 mV dec^-1 for oxygen evolution reaction(OER)and hydrogen evolution reaction(HER),***,a robust electrochemical stability is *** high-resolution X-ray photoelectron spectroscopy analyses reveal that the intrinsic HER activity improvement is attributed to the electron-enriched S on the strongly coupled NiS and Ni interface,which simultaneously facilitates the important electron transfer,consistent with the electrochemical impedance *** post characterizations demonstrate that surface reconstructed oxyhydroxide contributes to the OER activity and NiS/Ni is an OER *** structure construction with in-situ formation of active interface provides an effective way to design efficient electrocatalysts for energy conversion.