{"title":"Rh Nanoparticles Encaged in Hollow Porous Silica Nanospheres as Catalysts for Toluene Hydrogenation under Mild Reaction Conditions","authors":"Qianqian Zhou, Ru Hu and Zhirong Zhu*, ","doi":"10.1021/acsanm.4c0429310.1021/acsanm.4c04293","DOIUrl":null,"url":null,"abstract":"<p >In this work, we report Rh nanoparticles encaged in hollow porous silica nanospheres (Rh@HPSNs) as highly active toluene hydrogenation catalysts under mild reaction conditions. Poly(ethylenimine)/poly(acrylic acid) (PEI/PAA) micelles in a water–ethanol system were used as templates for silica deposition to synthesize core–shell-structured silica-coated PEI/PAA micelles, which were further soaked in a solution of Rh precursors, washed, calcined, and subsequently reduced by H<sub>2</sub> to obtain Rh@HPSNs, featuring small Rh nanoparticles in highly porous hollow silica nanospheres. The synthesized Rh@HPSNs illustrate high catalytic activities for toluene hydrogenation at 0.1 MPa H<sub>2</sub> and 30 °C and achieve a methylcyclohexane yield of >99% at a reaction time of 2.0 h and a toluene/Rh ratio of 500/1. To our best knowledge, Rh@HPSNs are comparable to state-of-the-art Rh-based catalysts at mild conditions for toluene hydrogenation, and the enhancement is ascribed to small-sized Rh particles efficiently utilizing the Rh metal, highly porous hollow silica nanospheres to accelerate mass transfer, and the protections of silica shells to the inner catalytic functionalities.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Nano Materials","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsanm.4c04293","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In this work, we report Rh nanoparticles encaged in hollow porous silica nanospheres (Rh@HPSNs) as highly active toluene hydrogenation catalysts under mild reaction conditions. Poly(ethylenimine)/poly(acrylic acid) (PEI/PAA) micelles in a water–ethanol system were used as templates for silica deposition to synthesize core–shell-structured silica-coated PEI/PAA micelles, which were further soaked in a solution of Rh precursors, washed, calcined, and subsequently reduced by H2 to obtain Rh@HPSNs, featuring small Rh nanoparticles in highly porous hollow silica nanospheres. The synthesized Rh@HPSNs illustrate high catalytic activities for toluene hydrogenation at 0.1 MPa H2 and 30 °C and achieve a methylcyclohexane yield of >99% at a reaction time of 2.0 h and a toluene/Rh ratio of 500/1. To our best knowledge, Rh@HPSNs are comparable to state-of-the-art Rh-based catalysts at mild conditions for toluene hydrogenation, and the enhancement is ascribed to small-sized Rh particles efficiently utilizing the Rh metal, highly porous hollow silica nanospheres to accelerate mass transfer, and the protections of silica shells to the inner catalytic functionalities.
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.