文献类型：期刊文献

英文题名：Engineering ultrafine Ir nanocrystals for electrochemical hydrogen evolution with highly superior mass activity

作者：Li, Hui[1];Wei, Hehe[1];Zhang, Longtao[1];Su, Zixiang[1];Gong, Xueqing[1]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, Ctr Computat Chem, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2023

卷号：410

起止页码：295

外文期刊名：CATALYSIS TODAY

收录：;EI(收录号：20222612263499);WOS:【SCI-EXPANDED(收录号:WOS:000930499200007)】；

基金：This study was supported by the National Natural Science Foundations of China (Grant No. 2210021178 and 92045303) , the Shanghai Sailing Program (21YF1409400) . The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the characterizations and Feringa Nobel Prize Scientist Joint Research Center.

语种：英文

外文关键词：Iridium electrocatalysis; Hydrogen evolution reaction; Mass activity; Water splitting

摘要：Highly active and durable noble metal-based catalysts for electrochemical hydrogen evolution are crucial for clean and renewable energy production, however, low abundance and high price hinder their development at industrial scale. Herein, we synthesized carbon-supported ultrafine iridium nanoparticles (Ir NPs/C) catalyst via solvothermal method which achieved ultralow overpotentials of 13 and 57 mV at the current density of 10 and 100 mA cm-2 for hydrogen evolution reaction (HER) in acidic media, respectively. The prepared Ir NPs/C catalyst also exhibited ultrahigh mass activity of 44.5 A mg- 1 at the overpotential of 40 mV and outstanding long-term stability in HER performance for 12 h, remarkably superior to state-of-the-art commercial Pt/C catalyst (3.3 A mg -1, fast decay) and commercial Ir/C catalyst (1.2 A mg -1). Furthermore, it possessed activities toward oxygen evolution reaction (OER) and overall water splitting. This work demonstrates evenly dispersed fine Ir NPs/C catalyst can facilitate highly efficient HER and provides inspiration for rational design of advanced electrocatalysts.