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[1,4]

机构：[1]Jinan Univ, Coll Chem & Mat Sci, Guangzhou 511443, Peoples R China;[2]Guangdong Polytech Normal Univ, Sch Innovat & Entrepreneurship, Guangzhou 510665, Peoples R China;[3]East China Univ Sci & Technol, Ctr Computat Chem & Res Inst Ind Catalysis, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]Guangzhou Panyu Polytech, Inst Adv Mat & Technol, Guangzhou 511483, Peoples R China

年份：2023

卷号：48

期号：39

起止页码：14642

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20231113703444);WOS:【SCI-EXPANDED(收录号:WOS:000981806900001)】；

基金：This study was supported by the Guangzhou Basic and Applied Basic Research Foundation (202102020432) , Guangdong Basic and Applied Basic Research Foundation (2020A1515110739) , Research Funds of the Innovation Platform for Guangzhou Panyu Polytechnic (2022KYPT04) , Fundamental Research Funds for the Central Universities (21620319) , Innovation Team Project in Guangdong Colleges and Universities (2021KCXTD009) , and the Start-up Funding of Jinan University. F.W. acknowledges the support by Youth Talent Project of Educational Commission of Guangdong Province (2020KQNCX041) and National College Students' Innovation and Entrepreneurship Training Program (202010588019) . H.W. acknowledges the support by National Natural Science Foundations of China (22102057) and Shanghai Sailing Program (21YF1409400).

语种：英文

外文关键词：Iridium doping; Acidic medium

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 the iridium doped Co3O4 (Ir-Co3O4) with low Ir content of 2.88 wt% for efficient acidic OER. Considering systemic characterizations, it is probably concluded 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 the current density of 10 mA cm-2 decreases from 382 mV to 225 mV and the value of Tafel slope decreases from 101.7 mV dec-1 to 64.1 mV dec-1. Besides, Ir-Co3O4 exhibits excellent electrocatalytic durability for continuous 130 h's