文献类型：期刊文献

英文题名：Oxygen Plasma Triggered Co-O-Fe Motif in Prussian Blue Analogue for Efficient and Robust Alkaline Water Oxidation

作者：Guan Xu, Hao[1];Zhu, Chen[1];Yang Lin, Hao[1];Kai Liu, Ji[1];Xiao Wu, Yi[1];Qin Fu, Huai[2];Yu Zhang, Xin[1];Mao, Fangxin[1];Yang Yuan, Hai[1];Sun, Chenghua[3];Fei Liu, Peng[1];Gui Yang, Hua[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Griffith Univ, Ctr Catalysis & Clean Energy, Gold Coast Campus, Gold Coast, Qld 4222, Australia;[3]Swinburne Univ Technol, Fac Sci Engn & Technol, Dept Chem & Biotechnol, Hawthorn 3122, Australia

年份：2025

卷号：64

期号：3

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20244617368332);WOS:【SCI-EXPANDED(收录号:WOS:001357087100001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (51920105003, 22239001 and 22379043), the Shanghai Pilot Program for Basic Research (22TQ1400100-12), the Science and Technology Commission of Shanghai Municipality (23520710700, 21DZ1207101 and 22ZR1415700), and the Fundamental Research Funds for the Central Universities. The authors also thank the Frontiers Science Center for Materiobiology and Dynamic Chemistry, the crew of the 1W1B beamline at the Beijing Synchrotron Radiation Facility (BSRF) for their constructive assistance with the XAFS measurements and data analyses, and the Ceshihui Integrated Scientific Platform (www.ceshihui.cn) for their support in the design of schematic figure of oxygen plasma treatment process.

语种：英文

外文关键词：alkaline water oxidation; anion exchange membrane water electrolyzers; lattice oxygen oxidation mechanism; oxygen evolution reaction; Prussian blue analogue

摘要：In the context of oxygen evolution reaction (OER), the construction of high-valence transition metal sites to trigger the lattice oxygen oxidation mechanism is considered crucial for overcoming the performance limitations of traditional adsorbate evolution mechanism. However, the dynamic evolution of lattice oxygen during the reaction poses significant challenges for the stability of high-valence metal sites, particularly in high-current-density water-splitting systems. Here, we have successfully constructed Co-O-Fe catalytic active motifs in cobalt-iron Prussian blue analogs (CoFe-PBA) through oxygen plasma bombardment, effectively activating lattice oxygen reactivity while sustaining robust stability. Our spectroscopic and theoretical studies reveal that the Co-O-Fe bridged motifs enable a unique double-exchange interaction between Co and Fe atoms, promoting the formation of high-valence Co species as OER active centers while maintaining Fe in a low-valence state, preventing its dissolution. The resultant catalyst (CoFe-PBA-30) requires an overpotential of only 276 mV to achieve 1000 mA cm-2. Furthermore, the assembled alkaline exchange membrane electrolyzer using CoFe-PBA-30 as anode material achieves a high current density of 1 A cm-2 at 1.76 V and continuously operates for 250 hours with negligible degradation. This work provides significant insights for activating lattice oxygen redox without compromising structure stability in practical water electrolyzers.