Insight into the role of metal support interface through the synergistic effect between Ag and α-Bi2Mo3O12 support for the selective oxidation of propylene to acrolein
Rattachement africain : in, kr, fi, tw, sa. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Pre-synthesized morphologically tailored size and shape selective silver nanoparticles (AgNPs) decorated on bismuth molybdate support (AgNPs/α–Bi2Mo3O12) using simple wet impregnation method was employed. The prepared AgNPs/α-Bi2Mo3O12 nanocatalysts were tested in the selective partial oxidation of propylene to acrolein reaction. The introduction of well-defined size and shape of AgNPs on α–Bi2Mo3O12 is greatly promoted the strong metal support interactions (SMSI), creation of oxygen vacancies (Ov) and high propylene adsorption binding energy (calculated by DFT). The strong metal support interactions between Ag and α-Bi2Mo3O12 is clearly elucidated by the high quality HRTEM and STEM–HAADF microscopic images. In addition, surface atomic molar ratio measured by XPS analysis determined the key redox properties of AgNPs/α–Bi2Mo3O12 system and their influence on the overall catalytic efficiency in the oxidation of propylene via reduction of Mo6+ to Mo5+ initiated at low temperatures in Ag/α–Bi2Mo3O12 system. The Mo reduction is further confirmed by the activated oxygen removal from the MoO42– moieties after Ag incorporation on α–Bi2Mo3O12. Thus, confirmed the oxidation reaction pathway follows a Mars–van–Krevelen process. Further, DFT calculations supported the propylene adsorption is more favorable over Ag/α–Bi2Mo3O12 than bare α–Bi2Mo3O12 support. The propylene oxidation performance over Ag/α–Bi2Mo3O12 system was 5.5 times higher than bare α–Bi2Mo3O12 support, probably due to an enabled strong metal support interaction and increased oxygen vacancies.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Insight into the role of metal support interface through the synergistic effect between Ag and α-Bi2Mo3O12 support for the selective oxidation of propylene to acrolein
- Date Crossref
- 01/04/2024
- 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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Indian Institute of Chemical Technology Department of Catalysis pays non établi dans la noticeStructure de recherche
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Chungnam National University Department of Chemical Engineering and Applied Chemistry pays non établi dans la noticeUniversité ou école supérieure
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University of Oulu pays non établi dans la noticeUniversité ou école supérieure
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Pondicherry University pays non établi dans la noticeUniversité ou école supérieure
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National Cheng Kung University Department of Environmental Engineering pays non établi dans la noticeUniversité ou école supérieure
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King Saud University pays non établi dans la noticeUniversité ou école supérieure
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Faculty of Technology Sustainable Chemistry Research Unit pays non établi dans la noticeUniversité ou école supérieure
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Pondicherry Central University Department of Chemistry pays non établi dans la noticeUniversité ou école supérieure
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College of Science Department of Chemistry pays non établi dans la noticeUniversité ou école supérieure
Department of Catalysis — Indian Institute of Chemical Technology, Department of Chemical Engineering and Applied Chemistry — Chungnam National University et University of Oulu, avec 6 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.