{"title":"Enhanced Selective Oxidation of Glycerol to Dihydroxyacetone over Pt@Sn-MFI Zeolites","authors":"Shiwei Wang, Tianhao Li, Yanle Li, Hongfeng Yin, Ziqi Tian, Hongbo Yu","doi":"10.1021/acs.iecr.4c01831","DOIUrl":null,"url":null,"abstract":"Supported Pt nanoparticles (NPs) exhibit excellent activity for the selective oxidation of glycerol (GL) derived from biodiesel production to high-value dihydroxyacetone (DHA). However, their selectivity to DHA is not satisfactory due to the preferential oxidation of the primary −OH in GL. In this study, Pt@Sn-MFI with ∼4.0 nm Pt NPs and different Si/Sn ratios were synthesized by an <i>in situ</i> encapsulation strategy. The optimized Pt@Sn-MFI-80 catalyst presents a 74.8% selectivity to DHA with a GL conversion of 43.5% at 60 °C. Our experiments and density functional theory (DFT) calculations indicated that the excellent selectivity was ascribed to the synergistic effect between Pt and Sn-MFI. Sn-MFI turned Pt NPs into an electronic-poor state so that suppressed further oxidation of glyceraldehyde (GLD); then, Sn-MFI triggered isomerization of GLD to generate DHA. The core–shell structure not only guaranteed an intimate contact between Pt and Sn-MFI but also enhanced the stability of the active Pt NPs.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Industrial & Engineering Chemistry Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1021/acs.iecr.4c01831","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Supported Pt nanoparticles (NPs) exhibit excellent activity for the selective oxidation of glycerol (GL) derived from biodiesel production to high-value dihydroxyacetone (DHA). However, their selectivity to DHA is not satisfactory due to the preferential oxidation of the primary −OH in GL. In this study, Pt@Sn-MFI with ∼4.0 nm Pt NPs and different Si/Sn ratios were synthesized by an in situ encapsulation strategy. The optimized Pt@Sn-MFI-80 catalyst presents a 74.8% selectivity to DHA with a GL conversion of 43.5% at 60 °C. Our experiments and density functional theory (DFT) calculations indicated that the excellent selectivity was ascribed to the synergistic effect between Pt and Sn-MFI. Sn-MFI turned Pt NPs into an electronic-poor state so that suppressed further oxidation of glyceraldehyde (GLD); then, Sn-MFI triggered isomerization of GLD to generate DHA. The core–shell structure not only guaranteed an intimate contact between Pt and Sn-MFI but also enhanced the stability of the active Pt NPs.
期刊介绍:
ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.