石油化工2023，Vol.52Issue(11)：1497-1504,8.DOI:10.3969/j.issn.1000-8144.2023.11.002
Pt-Ru/Nb2O5-SiO2催化甘油氢解中 Ru的促进机制研究
Promoting mechanism of Ru in glycerol hydrogenolysis catalyzed by Pt-Ru/Nb2O5-SiO2
摘要
Abstract
The metal Ru was introduced into catalysts by sequential impregnation method to prepare bimetallic Pt-Ru/Nb2O5-SiO2 catalysts,enhancing their activity for glycerol hydrogenolysis.The promoting mechanism of Ru were studied by XRD,N2 adsorption-desorption,H2-TPR,H2-TPD,NH3-TPD,XPS and HAADF-STEM.The experimental results show a"volcano-shaped"curve relationship between the amount of introduced Ru and the catalytic activity.Pt-4Ru/Nb2O5-SiO2 catalyst with a Ru loading amount of 4％(w)displays the highest activity,while the product distribution remains largely unaffected.A synergistic effect between the Ru and Pt species significantly enhances the reducibility of Pt improves the electronic structure of Pt,and facilitates the dissociation of H2 and the generation of active H species.Simultaneously,the modification of Pt by Ru also increases the content of weak acid sites on the catalyst surface,providing more adsorption sites for glycerol adsorption,significantly enhancing the catalytic activity of Pt-Ru/Nb2O5-SiO2 for glycerol hydrogenolysis.关键词
Pt催化剂/Ru/促进作用/甘油氢解Key words
Pt catalyst/Ru/promoting effect/glycerol hydrogenolysis分类
化学化工引用本文复制引用
张元凯,周政,郑晓明,曹约强,周静红..Pt-Ru/Nb2O5-SiO2催化甘油氢解中 Ru的促进机制研究[J].石油化工,2023,52(11):1497-1504,8.基金项目
国家自然科学基金项目(22178102). （22178102）
