| DOI | Trouver le DOI : https://doi.org/10.1016/j.jcou.2021.101824 |
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| Auteur | Rechercher : Panaritis, ChristopherIdentifiant ORCID : https://orcid.org/0000-0002-8597-3041; Rechercher : Yan, ShuoIdentifiant ORCID : https://orcid.org/0000-0002-9040-2112; Rechercher : Couillard, Martin1; Rechercher : Baranova, Elena A. |
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| Affiliation | - Conseil national de recherches Canada. Énergie, les mines et l'environnement
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| Bailleur de fonds | Rechercher : Natural Sciences and Engineering Research Council of Canada |
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| Format | Texte, Article |
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| Sujet | reverse water-gas shift (RWGS); iron-oxide; cobalt-oxide; metal-support interaction; self-sustained electro-promotion; electrochemical promotion of catalysis; CO₂ utilization |
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| Résumé | CO₂ transformed into CO is the initial step in the manufacturing of carbon-neutral products. Herein, the supported iron-oxide (FeOₓ) nanoparticles are investigated for the reverse water gas shift (RWGS) reaction from 200 °C to 400 °C under atmospheric conditions. The effect of the catalyst support is investigated by comparing unsupported and supported FeOₓ on Co₃O₄ and γ-Al₂O₃ supports. The FeOₓ/Co₃O₄ catalytic system displayed a high selectivity to CO (>99 %), a 1.4-fold CO₂ conversion increase over bare Co₃O₄ support and a 20-times improvement over FeOₓ/γ-Al₂O₃. The superior catalytic activity of FeOₓ/Co₃O₄ is attributed to the reducibility of Co₃O₄ under the reaction conditions and generation of oxygen vacancies. This in turn affected the electronic properties of the FeOₓ catalyst and as a result improved its catalytic activity for the RWGS reaction. To confirm the effect of oxygen vacancies in Co₃O₄ and the observed metal-support interaction (MSI), we performed electrochemical characterizations of the FeOₓ/Co₃O₄ catalyst. Under both anodic and cathodic polarization, the catalytic activity decreased by over 10 % due to the in-situ change in the oxidation state of Co₃O₄ during polarization, thus affecting the MSI effect between FeOₓ and Co₃O₄. Our study demonstrates that the application of electrochemical methods for studying the MSI effect in heterogeneous catalysts is a powerful and informative in-situ tool. |
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| Date de publication | 2021-12-02 |
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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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| Identificateur | S2212982021003917 |
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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 | 53f2519c-9475-409d-ba94-bb91483b2bf4 |
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| Enregistrement créé | 2023-01-13 |
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| Enregistrement modifié | 2023-01-25 |
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