{"title":"介孔二氧化硅MCM-41负载Pt-Ag双金属催化剂在4-硝基苯酚还原中的应用","authors":"A. S. Savel’eva, E. V. Evdokimova, G. V. Mamontov","doi":"10.1134/S0036023624602356","DOIUrl":null,"url":null,"abstract":"<p>Mesoporous silica MCM-41 with a specific surface area of 1134 m<sup>2</sup>/g was prepared. It was used to manufacture supported mono- and bimetallic Pt–Ag catalysts with various metal ratios by incipient wetness impregnation. After the reductive high-temperature treatment of Pt–Ag catalysts, Pt and Ag metal nanoparticles contacting with one another were formed on the surface of the support as shown by X-ray diffraction (XRD) and diffuse reflectance spectroscopy (DRS). The bimetallic catalysts showed an increased reactivity in TPR-H<sub>2</sub> compared to the relevant monometallic catalysts due to the interaction of AgO<sub><i>x</i></sub> and PtO<sub><i>y</i></sub> centers. The catalysts were tested in the reduction of 4-nitrophenol with sodium borohydride. A significant increase in 4-nitrophenol reduction rate over bimetallic catalysts was due to the synergistic effect of platinum and silver.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 11","pages":"1754 - 1761"},"PeriodicalIF":1.8000,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Pt–Ag Bimetallic Catalysts Supported on Mesoporous Silica MCM-41 in 4-Nitrophenol Reduction\",\"authors\":\"A. S. Savel’eva, E. V. Evdokimova, G. V. Mamontov\",\"doi\":\"10.1134/S0036023624602356\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Mesoporous silica MCM-41 with a specific surface area of 1134 m<sup>2</sup>/g was prepared. It was used to manufacture supported mono- and bimetallic Pt–Ag catalysts with various metal ratios by incipient wetness impregnation. After the reductive high-temperature treatment of Pt–Ag catalysts, Pt and Ag metal nanoparticles contacting with one another were formed on the surface of the support as shown by X-ray diffraction (XRD) and diffuse reflectance spectroscopy (DRS). The bimetallic catalysts showed an increased reactivity in TPR-H<sub>2</sub> compared to the relevant monometallic catalysts due to the interaction of AgO<sub><i>x</i></sub> and PtO<sub><i>y</i></sub> centers. The catalysts were tested in the reduction of 4-nitrophenol with sodium borohydride. A significant increase in 4-nitrophenol reduction rate over bimetallic catalysts was due to the synergistic effect of platinum and silver.</p>\",\"PeriodicalId\":762,\"journal\":{\"name\":\"Russian Journal of Inorganic Chemistry\",\"volume\":\"69 11\",\"pages\":\"1754 - 1761\"},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2024-11-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Russian Journal of Inorganic Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0036023624602356\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Inorganic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0036023624602356","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Pt–Ag Bimetallic Catalysts Supported on Mesoporous Silica MCM-41 in 4-Nitrophenol Reduction
Mesoporous silica MCM-41 with a specific surface area of 1134 m2/g was prepared. It was used to manufacture supported mono- and bimetallic Pt–Ag catalysts with various metal ratios by incipient wetness impregnation. After the reductive high-temperature treatment of Pt–Ag catalysts, Pt and Ag metal nanoparticles contacting with one another were formed on the surface of the support as shown by X-ray diffraction (XRD) and diffuse reflectance spectroscopy (DRS). The bimetallic catalysts showed an increased reactivity in TPR-H2 compared to the relevant monometallic catalysts due to the interaction of AgOx and PtOy centers. The catalysts were tested in the reduction of 4-nitrophenol with sodium borohydride. A significant increase in 4-nitrophenol reduction rate over bimetallic catalysts was due to the synergistic effect of platinum and silver.
期刊介绍：
Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.
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