Bimetallic oxide coupled with B-doped graphene as highly efficient electrocatalyst for oxygen evolution reaction  

硼掺杂石墨烯耦合双金属氧化物作为高效氧气析出电催化剂

作　　者：Yuanyuan Jiang Kai Dong Yizhong Lu Jiawei Liu Bo Chen Zhongqian Song Li Niu 姜媛媛;董凯;逯一中;刘佳玮;陈博;宋忠乾;牛利(School of Materials Science and Engineering,University of Jinan,Jinan 250022,China;Center for Programmable Materials,School of Materials Science and Engineering,Nanyang Technological University,Singapore 639798,Singapore;Center for Advanced Analytical Science,c/o School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]School of Materials Science and Engineering,University of Jinan,Jinan 250022,China [2]Center for Programmable Materials,School of Materials Science and Engineering,Nanyang Technological University,Singapore 639798,Singapore [3]Center for Advanced Analytical Science,c/o School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China

出　　处：《Science China Materials》2020年第7期1247-1256,共10页中国科学（材料科学（英文版）

基　　金：the financial supports from the National Natural Science Foundation of China(21902062 and 21705056);the Natural Science Foundation of Shandong Province(ZR2019YQ10 and ZR2018PB009);the Young Taishan Scholars Program(tsqn201812080);the Open Funds of the State Key Laboratory of Electroanalytical Chemistry(SKLEAC201901)。

摘　　要：Developing electrocatalysts with high performance and low cost for the oxygen evolution reaction(OER)is of great importance for fabricating renewable energy storage and conversion devices.Here,a series of boron-doped graphene(BG)-supported bimetallic oxides of Co and Ni were obtained and served as OER electrocatalysts.Surprisingly,the annealed Co-Ni-Ox/BG with a Co/Ni ratio of 1:1 exhibits high performance toward oxygen evolution in alkaline electrolyte.The overpotential is only 310 mV at the current density of 10 mA cm-2,superior to many mono-metallic oxides reported before,and even comparable to the commercial RuO2.The regulation of charge distribution in bimetallic oxides and the strong synergistic coupling effects together contribute to the superior electrocatalytic performance of the Co-Ni-Ox/BG toward OER.This study also offers several effective ways to design high-performance OER electrocatalysts for water splitting.开发高效价廉的氧气析出反应电催化剂对于制备多种可再生能量转化和存储器件至关重要.本文中,我们设计合成了一系列硼掺杂石墨烯负载的钴镍双金属氧化物,并研究了其氧气析出电催化性能.研究结果表明适当温度下退火后的Co-Ni-Ox/BG(Co/Ni比为1:1)在碱性条件下表现出非常高的氧气析出电催化性能.在电流密度为10 mA cm-2时,该电催化剂对氧气析出反应的过电位仅为310 mV,优于绝大多数已报道的基于单金属氧化物的催化剂,甚至可与商业RuO2电催化剂的性能相媲美.该双金属氧化物复合材料中,电荷分布的微调控及协同耦合效应都对该材料的电催化性能起到了促进作用.另外,本文还提出了几种可有效提高氧化物材料氧气析出电催化活性的方法.

关 键 词：bimetal oxide B-doped graphene oxygen evolution reaction ELECTROCATALYST hydrogen generation 

分 类 号：TQ426[化学工程] TQ116.14