文献类型：期刊文献

英文题名：Hollow NH2-MIL-101@TA derived electrocatalyst for enhanced oxygen reduction reaction and oxygen evolution reaction

作者：Zhang, Xiangkun[1];Hu, Xu[1];Lv, Suxue[1];Li, Yun[1];Ren, Jingru[1];Huang, Yongmin[1]

机构：[1]East China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tec, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：46

期号：78

起止页码：38692

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20214010973427);WOS:【SCI-EXPANDED(收录号:WOS:000713143700010)】；

语种：英文

外文关键词：Metal-organic frameworks; Hollow structure; Electrocatalyst; Oxygen reduction reaction; Oxygen evolution reaction

摘要：Non-precious metal-based electrocatalysts with excellent activity and stability are highly desired for the sluggish oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, a tannic acid (TA) etching strategy is used to inhibit the metal aggregation and achieve muti-metal doping. The hollow NH2-MIL-101@TA derived Fe-N-C catalyst exhibits superior ORR catalytic activity with an E-1/2 of 0.872 V and a maximum output power density of 123.4 mW cm(-2) in Zn-air battery. Since TA can easily chelate with metal ions, Fe/Co-N-C and Fe/Ni-N-C are also synthesized. Fe/Ni-N-C manifests exceptional bifunctional activity with an E-j = 10 of 1.67 V and a potential gap of 0.833 V between E-j = 10 and E-1/2 in alkaline electrolyte, which is 45 mV smaller than Pt/C-IrO2. The improvement of ORR and OER performance of the catalysts via the simple TA etching and chelation method provides a novel strategy for the design and synthesis of efficient electrocatalysts. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.