A high performance non-noble metal electrocatalyst for the oxygen reduction reaction derived from a metal organic framework

作     者：白杨芝 衣宝廉 李佳 蒋尚峰 张洪杰 邵志刚 宋玉江 Yangzhi Bai;Baolian Yi;Jia Li;Shangfeng Jiang;Hongjie Zhang;Zhigang Shao;Yujiang Song

作者机构：中国科学院大连化学物理研究所洁净能源国家实验室(筹)辽宁大连116023 中国科学院大学北京100049 大连理工大学化工系精细化工国家重点实验室辽宁大连116024 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2016年第37卷第7期

页      面：1127-1133页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Basic Research Program of China(973 Program,2015CB932304) the National Natural Science Founda-tion of China(21436003) 

主　　题：Fuel cellOxygen reduction reactionNon precious metal catalystMetal organic frameworkAlkaline condition 

摘      要：The development of a non-precious metal electrocatalyst （NPME） with a performance superior to commercial Pt/C for the oxygen reduction reaction （ORR） is important for the commercialization of fuel cells. We report the synthesis of a NPME by heat-treating Co-based metal organic frameworks （ZIF-67） with a small average size of 44 nm. The electrocatalyst pyrolyzed at 600 ~C showed the best performance and the performance was enhanced when it was supported on BP 2000. The resulting electrocatalyst was composed of 10 nm Co nanoparticles coated by 3-12 layers of N doped graphite layers which as a whole was embedded in a carbon matrix. The ORR performance of the electrocatalyst was tested by rotating disk electrode tests in O2-saturated 0.1 mol/L KOH under ambient conditions. The electrocatalyst （1.0 mg/cm~] showed an onset potential of 1.017 V （[vs. RHE] and a half-wave potential of 0.857 V （vs. RHE], which showed it was as good as the commer- cial Pt/C （20 BgPt/cm2）. Furthermore, the electrocatalyst possessed much better stability and re- sistance to methanol crossover than Pt/C.