| DOI | Trouver le DOI : https://doi.org/10.1016/j.apcatb.2017.08.017 |
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| Auteur | Rechercher : Sun, Yi-Fei; Rechercher : Zhang, Ya-Qian; Rechercher : Yang, Yan-Ling; Rechercher : Chen, Jian1; Rechercher : Hua, Bin; Rechercher : Shi, Yi-Xiang; Rechercher : Wang, Chang-An; Rechercher : Luo, Jing-Li |
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| Affiliation | - Conseil national de recherches du Canada. Nanotechnologie
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| Format | Texte, Article |
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| Résumé | 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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| Date de publication | 2017-08-05 |
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| Maison d’édition | Elsevier |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 23003313 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 32e8c58b-8e51-4fd3-a45a-b7ae4ca7c01c |
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| Enregistrement créé | 2018-05-14 |
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| Enregistrement modifié | 2020-03-16 |
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