High‐performance perovskite composite electrocatalysts enabled by controllable interface engineering

Xu, Xiaomin and Pan, Yangli and Ge, Lei ORCID: https://orcid.org/0000-0003-2989-0329 and Chen, Yubo and Mao, Xin and Guan, Daqin and Li, Mengran and Zhong, Yijun and Hu, Zhiwei and Peterson, Vanessa K. and Saunders, Martin and Chen, Chien‐Te and Zhang, Haijuan and Ran, Ran and Du, Aijun and Wang, Hao and Jiang, San Ping and Zhou, Wei and Shao, Zongping (2021) High‐performance perovskite composite electrocatalysts enabled by controllable interface engineering. Small, 17 (29):2101573. pp. 1-10. ISSN 1613-6810


Abstract

Single-phase perovskite oxides that contain nonprecious metals have long been pursued as candidates for catalyzing the oxygen evolution reaction, but their catalytic activity cannot meet the requirements for practical electrochemical energy conversion technologies. Here a cation deficiency-promoted phase separation strategy to design perovskite-based composites with significantly enhanced water oxidation kinetics compared to single-phase counterparts is reported. These composites, self-assembled from perovskite precursors, comprise strongly interacting perovskite and related phases, whose structure, composition, and concentration can be accurately controlled by tailoring the stoichiometry of the precursors. The composite catalyst with optimized phase composition and concentration outperforms known perovskite oxide systems and state-of-the-art catalysts by 1-3 orders of magnitude. It is further demonstrated that the strong interfacial interaction of the composite catalysts plays a key role in promoting oxygen ionic transport to boost the lattice-oxygen participated water oxidation. These results suggest a simple and viable approach to developing high-performance, perovskite-based composite catalysts for electrochemical energy conversion.


Statistics for USQ ePrint 42471
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published online: 17 June 2021. Permanent restricted access to ArticleFirst version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 29 Jun 2021 02:20
Last Modified: 29 Jul 2021 03:26
Uncontrolled Keywords: cation deficiency; controllable interface engineering; oxygen evolution reaction; perovskite composites; phase separation; water splitting
Fields of Research (2008): 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030301 Chemical Characterisation of Materials
03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030304 Physical Chemistry of Materials
09 Engineering > 0904 Chemical Engineering > 090402 Catalytic Process Engineering
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
40 ENGINEERING > 4004 Chemical engineering > 400404 Electrochemical energy storage and conversion
Identification Number or DOI: https://doi.org/10.1002/smll.202101573
URI: http://eprints.usq.edu.au/id/eprint/42471

Actions (login required)

View Item Archive Repository Staff Only