文献类型：期刊文献

英文题名：Ir-Doped Co3o4 as Efficient Electrocatalyst for Acidic Oxygen Evolution Reaction

作者：Xie, Yusheng[1]; Su, Yanyan[1]; Qin, Haoran[1]; Cao, Zhilin[1]; Wei, Hehe[3]; Wu, Fengchi[2]; Ou, Gang[1]

机构：[1] College of Chemistry and Materials Science, Jinan University, Guangzhou, 511443, China; [2] School of Innovation and Entrepreneurship, Guangdong Polytechnic Normal University, Guangzhou, 510665, China; [3] Key Laboratory for Advanced Materials, Center for Computational Chemistry, Research Institute of Industrial Catalysis, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220331235)

语种：英文

外文关键词：Durability - Electrocatalysts - Iridium compounds - Oxygen - Reaction kinetics - Slope stability

摘要：Oxygen evolution reaction (OER) is an important bottleneck for large-scale acidic water splitting applications due to its sluggish reaction kinetics. Therefore, the development of highly active, stable, and inexpensive electrocatalysts for OER remains a challenge. Herein, we develop a low iridium content (2.88 wt.%) doped Co3O4 (Ir-Co3O4) for efficient acidic OER. The results show that Ir can be uniformly doped into the lattice of Co3O4 and induce a certain distortion. The electrochemical results reveal that Ir-Co3O4 nanoparticles demonstrate significantly enhanced electrocatalytic OER activity and stability in 0.5 M H2SO4 solution compared with pure Co3O4, in which the overpotential at current density of 10 mA cm-2 decreases from 382 mV to 225 mV and the Tafel slope decreases from 101.7 mV dec-1 to 64.1 mV dec-1. Besides, Ir-Co3O4 exhibits excellent electrocatalytic durability for continuous 25 h’s test without any activity attenuation. Moreover, this work provides a kind of high-performance acidic OER electrocatalyst for the development of hydrogen energy. ? 2022, The Authors. All rights reserved.