Stearic Acid Induced Hydrophobization of Pt/Al2O3 Catalysts to Boost the Stability of Preferential Oxidation of CO in Hydrogen
Rattachement africain : cn, no. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
For industrial hydrogen purification in the methanol-reforming process, it is crucial to develop catalysts that exhibit excellent water tolerance for preferential CO oxidation (CO-PROX) in the presence of a high amount of H 2 O. Herein, the hydrophobic strategy was proposed by bridging stearic acid molecules on the surface of the Pt/Al 2 O 3 catalyst. The stearic acid molecules significantly enhanced the hydrophobicity of the Pt/Al 2 O 3 catalyst, increasing the water contact angle from 20.1° to 150.2°, avoiding the water coverage of active sites, and extending the lifetime of the catalyst. By modulating the stearic acid treatment, the formation of the R–O–Pt structure has been successfully avoided to a certain extent, maintaining the ability of CO linear adsorption on the Pt sites with the high Pt electron density. Compared with the Pt/Al 2 O 3 catalyst with poor stability, the hydrophobic Pt/Al 2 O 3 catalyst achieved a 100% CO conversion in the presence of CO 2 and H 2 O within the temperature range of 140–200 °C and maintained catalytic stability over 100 h. This work gives a novel approach to mitigate the adverse effects of water on the catalyst in realistic industrial CO preferential oxidation.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Stearic Acid Induced Hydrophobization of Pt/Al<sub>2</sub>O<sub>3</sub> Catalysts to Boost the Stability of Preferential Oxidation of CO in Hydrogen
- Date Crossref
- 08/08/2024
- Éditeur
- American Chemical Society (ACS)
- 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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China University of Petroleum State Key Laboratory of Heavy Oil Processing pays non établi dans la noticeUniversité ou école supérieure
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Norwegian University of Science and Technology Department of Chemical Engineering pays non établi dans la noticeUniversité ou école supérieure
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Dongguan University of Technology Key Laboratory of Distributed Energy Systems of Guangdong Province pays non établi dans la noticeUniversité ou école supérieure
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National Engineering Research Center of Coal Gasification and Coal-Based Advanced Materials pays non établi dans la noticeStructure de recherche
State Key Laboratory of Heavy Oil Processing — China University of Petroleum, Department of Chemical Engineering — Norwegian University of Science and Technology et Key Laboratory of Distributed Energy Systems of Guangdong Province — Dongguan University of Technology, avec 1 autre affiliation.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.