Molten salt electrochemical modulation of Ni/Co nanoparticles onto N-doped carbon for oxygen reduction

作     者：Xinxin Liang Jialin Chen Biao Hong Tingting Wan Wei Weng Wei Xiao Xinxin Liang;Jialin Chen;Biao Hong;Tingting Wan;Wei Weng;Wei Xiao

作者机构：College of Chemistry and Molecular SciencesHubei Key Laboratory of Electrochemical Power SourcesWuhan UniversityWuhan 430072HubeiChina Zijin School of Geology and MiningFujian Key Laboratory of Green Extraction and High-value Utilization of Energy MetalsFuzhou UniversityFuzhou 350108FujianChina Queen Marry University of London Engineering SchoolNorthwestern Polytechnical UniversityXi’an 710129ShaanxiChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第11期

页      面：212-217,I0007页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 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：the funding support from the National Key R&D Program of China(2018YFE0201703) the Fundamental Research Funds for the Central Universities(2042022kf1174)。 

主　　题：Oxygen reduction Metal-nitrogen-carbon Electrochemistry Molten salt Bimetal modulation 

摘      要：Activation of oxygen over non-precious materials has been an imperative task to develop efficient electrochemical energy storage and conversion such as fuel cells and metal-air batteries.Herein,a molten salt electrochemical modulation of metal-nitrogen-carbon based compounds(M–N–C)is achieved.By electrochemical treatment of polydopamine-coated NiCo_(2)O_(4)(NiCo_(2)O_(4)@PDA)in molten Li_(2)CO_(3)-Na_(2)CO_(3)-K_(2)CO_(3)at 500℃,Ni/Co bimetal-nitrogen-carbon catalyst(denoted as Ni/Co@NC)consisting of Ni-Co nanoparticles anchoring on porous nitrogen-doped carbon is constructed and evaluated as electrocatalysts towards the oxygen reduction reaction(ORR).Experimental and calculation results confirm that alloying of Ni-Co and nitrogen doping to carbon enhances the rate-determining transformation of*OH intermediate during ORR.The Ni/Co@NC hence shows an ORR activity comparable with the commercial Pt/C.