文献类型：期刊文献

英文题名：Ir-RuO x Nanoparticles on WO3 Ultrafine Nanowires As Catalysts for the Oxygen Evolution Reaction in Acidic Media

作者：Li, Xinyi[1];Gu, Zihan[1];Cheng, Junfang[1];Zhang, Guozhu[2];Zheng, Fenghua[3];Huang, Jiawei[1];Xu, Jingxiang[4];Wei, Guanghua[1];Zhang, Junliang[3]

机构：[1]Shanghai Jiao Tong Univ, Paris Elite Inst Technol, Shanghai 200240, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai 200237, Peoples R China;[3]Shanghai Jiao Tong Univ, Inst Fuel Cells, Sch Mech Engn, Shanghai 200240, Peoples R China;[4]Shanghai Ocean Univ, Coll Engn Sci & Technol, Shanghai 201306, Peoples R China

年份：2024

卷号：7

期号：11

起止页码：12958

外文期刊名：ACS APPLIED NANO MATERIALS

收录：;EI(收录号：20242116135063);WOS:【SCI-EXPANDED(收录号:WOS:001227335000001)】；

基金：This work gratefully acknowledge the financial supports from Research start-up funds and Instrumental Analysis Center of Shanghai Jiao Tong University.

语种：英文

外文关键词：green hydrogen production; acidic water electrolysis; oxygen evolution reaction; morphology engineering; supported iridium and ruthenium catalyst; surface hydroxylgroups

摘要：Iridium- and ruthenium-based materials show high activity for oxygen evolution reaction (OER) in acidic media while Ru-based catalysts exhibit low stability, but Ir-based materials are limited by their high cost and low reserves. The rational design of the OER electrocatalysts to balance activity, stability, and cost is facing a challenge. Herein, we report a strategy to synthesize Ir-RuOx@WO3 catalyst using a low-temperature wet reflux method to deposit Ir-RuOx nanoparticles on ultrafine WO3 nanowires. Due to the metal-metal support interaction (MMSI) between Ir-RuOx and WO3, the abundant hydroxyl groups on the surface, and the protection of active sites by the mild catalyst synthesis method, Ir-RuOx@WO3 demonstrates the OER activity with a low overpotential of 148 mV at 10 mA/cm(2) while the total precious metal usage is only 7.673 wt % (2.990 wt % Ir and 4.647 wt % Ru). Besides, with Ru activating the valence state of Ir to improve the activity and Ir stabilizing the Ru site to improve the stability, Ir-RuOx@WO3 achieved relative activity-stability balance as there was no noticeable degradation when operating at 10 mA/cm(2) for 12 h. This study presents design concepts of acidic OER catalysts to balance activity, stability, and cost, promoting the widespread use of PEMWE technology in industrial settings.