Ruthenium-modified porous NiCo2O4 nanosheets boost overall water splitting in alkaline solution

作     者：Rui Yang Xuezhao Shi Yanyan Wang Jing Jin Hanwen Liu Jie Yin Yong-Qing Zhao Pinxian Xi Rui Yang;Xuezhao Shi;Yanyan Wang;Jing Jin;Hanwen Liu;Jie Yin;Yong-Qing Zhao;Pinxian Xi

作者机构：State Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical EngineeringLanzhou University Lanzhou 730000China Lanzhou Jinchuan Advanced Materials Technology Co.Ltd.Jinchang 737100China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2022年第33卷第11期

页      面：4930-4935页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：support from the National Natural Science Foundation of China(Nos.21922105 and 21931001) the National Key R&D Program of China(2021YFA1501101) the Special Fund Project of Guiding Scientific and Technological Innovation Development of Gansu Province(No.2019ZX-04) the 111 Project(No.B20027) support by the Fundamental Research Funds for the Central Universities(Nos.lzujbky-2021-pd04,lzujbky-2021-sp41,lzujbky-2021-it12 and lzujbky-2021-37) support of the China Postdoctoral Science Foundation(No.2021M691375) the China National Postdoctoral Program for Innovative Talents(No.BX20200157)。 

主　　题：Ru modification Porous nanosheets Oxygen vacancy Spinel-based oxides Water splitting 

摘      要：Exploring efficient oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)electrocatalysts is crucial for developing water splitting devices.The composition and structure of catalysts are of great importance for catalytic performance.In this work,a heterogeneous Ru modified strategy is engineered to improve the catalytic performance of porous NiCo_(2)O_(4)nanosheets(NSs).Profiting from favorable elements composition and optimized structure property of decreased charge transfer barrier,more accessible active sites and increased oxygen vacancy concentration,the Ru-NiCo_(2)O_(4)NSs exhibits excellent OER activity with a low overpotential of 230 mV to reach the current density of 10 mA/cm^(2)and decent durability.Furthermore,Ru-NiCo_(2)O_(4)NSs show superior HER activity than the pristine NiCo_(2)O_(4)NSs,as well.When assembling Ru-NiCo_(2)O_(4)NSs couple as an alkaline water electrolyzer,a cell voltage of 1.60 V can deliver the current density of 10 mA/cm^(2).This work provides feasible guidance for improving the catalytic performance of spinel-based oxides.