文献类型：期刊文献

英文题名：Efficient and durable OER electrocatalysts through vacancy engineering and core-shell structure design in acidic environment

作者：Zhang, Yu[1];Li, Yixuan[1];Wei, Hehe[1];Wang, Qiang[1];Su, Zixiang[1];Li, Zhenxiao[1];Gao, Yiyun[1];Shen, Yang[1];Li, Hui[1];Zhang, Longtao[1];Zu, Di[2];Wang, Haifeng[1];Gong, Xue-Qing[3]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Peoples R China;[3]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China

年份：2024

卷号：46

外文期刊名：MATERIALS TODAY ENERGY

收录：;EI(收录号：20244317251739);WOS:【SCI-EXPANDED(收录号:WOS:001342011200001)】；

基金：This work was supported by National Key R & D Program of China (2021YFA1500700) , National Natural Science Foundation of China (22102057, 22203030, 21825301, 92045303) and Shanghai Sailing Program (21YF1409400) . The authors thank Research Center of Analysis and Test of East China University of Science and Technology and Feringa Nobel Prize Scientist Joint Research Center for the characterizations.

语种：英文

外文关键词：Acidic water oxidation; Electrocatalyst; Stability

摘要：The electrocatalytic conversion of water into green hydrogen energy through overall water splitting advances sustainable energy goals. However, it is limited by the slow kinetics of the oxygen evolution reaction (OER) and durability challenges at high potentials. Here, we rationally develop a series of Mn-doped RuO2-coated Ru (MnRu@RuO2) catalysts involving unique core-shell structures and abundant lattice distortions induced by oxygen defects. The optimal Mn-Ru@RuO2 sample demonstrated robust activity, achieving a low overpotential of 220 mV at 10 mA cm- 2. Notably, this sample exhibited minimal degradation after 220 h and a 25.5-fold increase in mass activity (1.37 A mgRu-1) compared to commercial RuO2 at an overpotential of 300 mV. These results suggest that regulated oxygen deficiencies and optimal Ru3+/Ru4+ ratios facilitate the lattice oxygen oxidation (LOM) mechanism and the formation of a high concentration of *OH radicals, enhancing acidic OER performance. Additionally, the unique core-shell structures effectively prevent over-oxidation of the RuO2 shell, ensuring superior durability. This research not only breaks the trade-off of electrochemical activity and durability, but also provides valuable insights into the design of highly efficient and stable electrocatalysts.