Rb‐Doped Perovskite Oxides: Surface Enrichment and Structural Reconstruction During the Oxygen Evolution Reaction

Author:

Xie Huachao1,Zhang Yuxuan1,Liu Panpan23,Duo Xuyao1,Hu Zhonghui1,Yu Jia1,Wang Zihan1,Yao Guodong4,Feng Lingyan1,Huang Xing23,Ouyang Runhai1,Wang Yuanqing1ORCID

Affiliation:

1. Materials Genome Institute Shanghai University Shanghai 200444 P. R. China

2. College of Chemistry Fuzhou University Fuzhou 350116 P. R. China

3. Qingyuan Innovation Laboratory Quanzhou 362801 P. R. China

4. State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai 200092 P. R. China

Abstract

AbstractAlkali‐metal doped perovskite oxides have emerged as promising materials due to their unique properties and broad applications in various fields, including photovoltaics and catalysis. Understanding the complex interplay between alkali metal doping, structural modifications, and their impact on performance remains a crucial challenge. In this study, this challenge is addressed by investigating the synthesis and properties of Rb‐doped perovskite oxides. These results reveal that the doping of Rb into perovskite oxides function as a structural modifier in the as‐synthesized samples and during the oxygen evolution reaction (OER) as well. Electron microscopy and first‐principles calculations confirm the enrichment of Rb on the surface of the as‐synthesized sample. Further investigations into the electrocatalytic reaction revealed that the Rb‐doped perovskite underwent drastic restructuring with Rb leaching and formation of strontium oxide.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Natural Science Foundation of Shanghai Municipality

Publisher

Wiley

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