Direct evidence of boosted oxygen evolution over perovskite by enhanced lattice oxygen participation
Article
Article Title | Direct evidence of boosted oxygen evolution over perovskite by enhanced lattice oxygen participation |
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ERA Journal ID | 122966 |
Article Category | Article |
Authors | Pan, Yangli (Author), Xu, Xiaomin (Author), Zhong, Yijun (Author), Ge, Lei (Author), Chen, Yubo (Author), Veder, Jean-Pierre Marcel (Author), Guan, Daqin (Author), O’Hayre, Ryan (Author), Li, Mengran (Author), Wang, Guoxiong (Author), Wang, Hao (Author), Zhou, Wei (Author) and Shao, Zongping (Author) |
Journal Title | Nature Communications |
Journal Citation | 11, pp. 1-10 |
Article Number | 2002 |
Number of Pages | 10 |
Year | 2020 |
Publisher | Nature Publishing Group |
Place of Publication | United Kingdom |
ISSN | 2041-1723 |
Digital Object Identifier (DOI) | https://doi.org/10.1038/s41467-020-15873-x |
Web Address (URL) | https://www.nature.com/articles/s41467-020-15873-x |
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. |
Keywords | Catalytic mechanisms; Electrocatalysis; Materials chemistry; Solid-state chemistry |
ANZSRC Field of Research 2020 | 340305. Physical properties of materials |
340210. Solid state chemistry | |
400408. Reaction engineering (excl. nuclear reactions) | |
Byline Affiliations | Centre for Future Materials |
Curtin University | |
Nanjing Tech University, China | |
Colorado School of Mines, United States | |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5v82/direct-evidence-of-boosted-oxygen-evolution-over-perovskite-by-enhanced-lattice-oxygen-participation
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