文献类型：期刊文献

英文题名：Ultrathin iridium carbonyl formate for efficient and durable acidic oxygen evolution electrocatalysis

作者：Guo, Jian Wei[1];Mao, Fangxin[1];Fang, Song Ru[1];Lin, Hao Yang[1];Wang, Huan[1];Li, Wen Jing[1];Yuan, Hai Yang[1];Yang, Shuang[1];Liu, Peng Fei[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：12

期号：40

起止页码：27280

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20243717015332);WOS:【SCI-EXPANDED(收录号:WOS:001304449000001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22239001, 51920105003, 22379043 and 52103340), the Shanghai Pilot Program for Basic Research (22TQ1400100-12), the Science and Technology Commission of Shanghai Municipality (21DZ1207101 and 22ZR1415700). The authors also thank the Frontiers Science Center for Materiobiology and Dynamic Chemistry, the crew of the BL14W1 beamline at the Shanghai Synchrotron Radiation Facility (SSRF) and the 1W1B beamline of Beijing Synchrotron Radiation Facility (BSRF) for their constructive assistance with the XAFS measurements and data analyses.

语种：英文

外文关键词：Coordination reactions - Iridium - Iridium compounds - Oxygen evolution reaction

摘要：Proton exchange membrane water electrolyzers (PEMWEs) currently rely on benchmark iridium (Ir)-based electrocatalysts for the acidic oxygen evolution reaction (OER) at the anode. Herein, we report a novel two-dimensional (2D) complex-based electrocatalyst of Ir carbonyl formate (IrCF) with an atomic-level thickness architecture, synthesized using a fast microwave method, for a highly active and stable OER in an acidic solution. The local atomic coordination configuration of Ir active sites can be further finely regulated through the introduction of 1,3,5-benzenetricarboxylic molecules to enhance OER performance. An optimized overpotential as low as 248 mV can be achieved at a current density of 10 mA cm-2 in 0.1 M HClO4 solution, with accelerated kinetics showing a Tafel slope of 32 mV dec-1. 2D IrCF could work stably at a current density of 1 A cm-2 in a PEMWE device for more than 100 hours without obvious degradation. Iridium carbonyl formate nanoflakes were fabricated swiftly via a liquid-phase microwave method, showcasing a remarkable acidic water oxidation performance and sustaining operation in proton exchange membrane electrolysis at 1.0 A cm-2 for 100 h.