| DOI | Resolve DOI: https://doi.org/10.1016/j.apcatb.2017.08.017 |
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| Author | Search for: Sun, Yi-Fei; Search for: Zhang, Ya-Qian; Search for: Yang, Yan-Ling; Search for: Chen, Jian1; Search for: Hua, Bin; Search for: Shi, Yi-Xiang; Search for: Wang, Chang-An; Search for: Luo, Jing-Li |
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| Affiliation | - National Research Council of Canada. Nanotechnology
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| Format | Text, Article |
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| Abstract | Extensive research has been devoted to the development of advanced oxygen reduction reaction (ORR) catalysts with functionally diverse active sites. Herein, we show a smart approach to advancing the ORR catalytic activity of a 3D porous perovskite. The facile oxidative-reductive-oxidative (O-R-O) thermal treatment cycle executed on Ag doped LaFeO3 could stepwise switch on three different reaction sites (exsolved Ag-NPs, oxygen deficiency and Fe4+ with optimal electron configuration) for ORR. Detailed characterizations illustrate that the ORR activity is basically derived from the hierarchically porous scaffold which provides a large surface area and enough pore volumes for mass and ion diffusion. More importantly, the unique synergistic effects among three separate kinds of reaction sites endow the speed-up of oxygen adsorption, activation and O2− transportation. The exemplified results set out new design principles for the optimization of alternative catalysts. |
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| Publication date | 2017-08-05 |
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| Publisher | Elsevier |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23003313 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 32e8c58b-8e51-4fd3-a45a-b7ae4ca7c01c |
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| Record created | 2018-05-14 |
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| Record modified | 2020-03-16 |
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