Direct evidence of boosted oxygen evolution over perovskite by enhanced lattice oxygen participation

Pan, Yangli and Xu, Xiaomin and Zhong, Yijun and Ge, Lei ORCID: https://orcid.org/0000-0003-2989-0329 and Chen, Yubo and Veder, Jean-Pierre Marcel and Guan, Daqin and O’Hayre, Ryan and Li, Mengran and Wang, Guoxiong and Wang, Hao and Zhou, Wei and Shao, Zongping (2020) Direct evidence of boosted oxygen evolution over perovskite by enhanced lattice oxygen participation. Nature Communications, 11:2002. pp. 1-10. ISSN 2041-1723

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Abstract

The development of oxygen evolution reaction (OER) electrocatalysts remains a major challenge that requires significant advances in both mechanistic understanding and material design. Recent studies show that oxygen from the perovskite oxide lattice could participate in the OER via a lattice oxygen-mediated mechanism, providing possibilities for the development of alternative electrocatalysts that could overcome the scaling relations-induced limitations found in conventional catalysts utilizing the adsorbate evolution mechanism. Here we distinguish the extent to which the participation of lattice oxygen can contribute to the OER through the rational design of a model system of silicon-incorporated strontium cobaltite perovskite electrocatalysts with similar surface transition metal properties yet different oxygen diffusion rates. The as-derived silicon-incorporated perovskite exhibits a 12.8-fold increase in oxygen diffusivity, which matches well with the 10-fold improvement of intrinsic OER activity, suggesting that the observed activity increase is dominantly a result of the enhanced lattice oxygen participation.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
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: 21 Jul 2020 00:54
Last Modified: 27 Jul 2020 01:29
Uncontrolled Keywords: Catalytic mechanisms; Electrocatalysis; Materials chemistry; Solid-state chemistry
Fields of Research (2008): 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030304 Physical Chemistry of Materials
03 Chemical Sciences > 0302 Inorganic Chemistry > 030206 Solid State Chemistry
09 Engineering > 0904 Chemical Engineering > 090402 Catalytic Process Engineering
Socio-Economic Objectives (2008): D Environment > 96 Environment > 9603 Climate and Climate Change > 960302 Climate Change Mitigation Strategies
B Economic Development > 85 Energy > 8504 Energy Transformation > 850401 Fuel Cells (excl. Solid Oxide)
Identification Number or DOI: 10.1038/s41467-020-15873-x
URI: http://eprints.usq.edu.au/id/eprint/38705

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