A dual promotional effect of doping tantalum (Ta) in atomically dispersed Ru/CeO2 catalyst toward CO2 methanation: Enhanced associative adsorption of CO2 and activation of H2
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Le résumé fourni par la source
Precisely controlling the product selectivity in CO 2 hydrogenation through rational catalyst design presents a promising approach to mitigate environmental and energy-related challenges, though it remains a significant scientific hurdle. Herein, the CH 4 selectivity of 0.5 wt% Ru loaded catalysts at 250 °C was effectively shifted from approximately 35 % to 100 % through the incorporation of Ta dopant into the CeO 2 support. The EXAFS spectra in conjunction with CO DRIFTS experiment indicated the presence of atomically dispersed Ru particles anchored on the Ta-doped CeO 2 surface. A higher oxidized CeO 2 surface was evidenced in the presence of Ta dopant. The presence of Ta dopant also improved the dispersion of Ru species and their interaction with the support. Most importantly, the Ru/Ta-CeO 2 catalyst exhibited a pronounced capacity for associative CO 2 -adsorption under atmospheric pressure at 50 °C. An improved H 2 activation was also observed under CO 2 hydrogenation conditions. This novel finding of the dual promotional effect of Ta carries a significant impact in the field of CO 2 capture and utilization. • A novel Ru/Ta-CeO 2 catalyst was prepared for selective methanation of CO 2 . • Atomically dispersed Ru particles were anchored on the Ta-CeO 2 surface. • A higher oxidized CeO 2 surface was evidenced in the presence of Ta dopant. • The Ru/Ta-CeO 2 catalyst exhibited a remarkable CO 2 adsorption capacity. • H 2 activation was significantly improved on the Ru/Ta-CeO 2 surface under CO 2 methanation conditions.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- A dual promotional effect of doping tantalum (Ta) in atomically dispersed Ru/CeO2 catalyst toward CO2 methanation: Enhanced associative adsorption of CO2 and activation of H2
- Date Crossref
- 01/12/2025
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Brookhaven National Laboratory Chemistry Division pays non établi dans la noticeStructure de recherche
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United States India Educational Foundation pays non établi dans la noticeInstitution
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Birla Institute of Technology and Science - Hyderabad Campus pays non établi dans la noticeUniversité ou école supérieure
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Stony Brook University Department of Chemistry pays non établi dans la noticeUniversité ou école supérieure
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US-India Educational Foundation pays non établi dans la noticeOrganisation à but non lucratif
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Birla Institute of Science and Technology (BITS) Pilani Department of Chemistry pays non établi dans la noticeStructure de recherche
Chemistry Division — Brookhaven National Laboratory, United States India Educational Foundation et Birla Institute of Technology and Science - Hyderabad Campus, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.