文献类型：期刊文献

英文题名：An Angstrom-Scale Protective Skin Grown In Situ on Perovskite Oxide to Enhance Stability in Water

作者：Zhou, A-Wanglin[1];Xu, Fang[1];Tan, Jinkun[1];Liu, Zhengkun[1];Zhang, Guangru[1,2];Xu, Zhi[3];Lyu, Yinong[4];Jin, Wanqin[1]

机构：[1]Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu Rd S, Nanjing 211816, Peoples R China;[2]Suzhou Lab, Suzhou 215125, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[4]Nanjing Tech Univ, Coll Mat Sci & Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu Rd S, Nanjing 211816, Peoples R China

年份：2025

卷号：64

期号：6

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20244617368384);WOS:【SCI-EXPANDED(收录号:WOS:001358305100001)】；

基金：This work was supported by the National Key Research and Development Program of China (2022YFB3808400), the National Natural Science Foundation of China (U23A20117), the Natural Science Foundation of Jiangsu Province (BK20220002, BE2022024) and the Leading Talents Program of Zhejiang Province (2024C03223) and Topnotch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP).

语种：英文

外文关键词：perovskite; exsolution; nanostructures; interfaces; aqueous stability

摘要：The utilization of perovskite oxide as a catalyst for aqueous reactions is promising but challenging in stability. Here, we propose an in situ growth strategy that constructs an ultrathin protective skin on the Sr0.9Fe0.81Ta0.09Ni0.1O3-delta perovskite surface and thus effectively solves the stability issue. Using a spherical aberration-corrected transmission electron microscope, we observe the coexistence of an angstrom-scale (similar to 7 angstrom) Fe2O3 protective skin and FeNi alloy nanoparticles. A number of alloy nanoparticles grow along with the skin and uniformly take root on the skin surface. Such a hierarchical structure can reconstruct the surface electronic structure and suppress the ion leaching of perovskite oxide in water. Benefiting from this unique structure, the catalyst has experienced a substantial increase (800 h, more than three orders of magnitude) in its stable operation time in water (for example, in a hydrogen evolution reaction). These results provide valuable insight into solid-solid phase transitions and have substantial implications for using structural defects at surfaces to modulate mass transport and transformation kinetics. Our strategy is sufficiently simple and can be used to subtly manipulate the catalyst structures to improve the performance of perovskite-based catalysts and potentially other oxide catalysts for a wide range of reactions.