燃料化学学报2025，Vol.53Issue(11)：1641-1653,13.DOI:10.1016/S1872-5813(25)60579-2
Al2O3表面钾改性及对丙烷脱氢PtSn活性位的协同调控
Potassium modification on Al2O3 surface and synergistic regulation of propane dehydrogenation PtSn active sites
摘要
Abstract
The intricate surface hydroxyl structure of alumina(Al2O3)presents a significant challenge in precisely tailoring both its surface properties and the structure of the supported metal for catalytic optimization.Addressing this challenge,this study employed alkali metal K to modify Al2O3,systematically investigating the influence of K loading on the surface hydroxyl groups and the structure of the metal active phase,along with the associated mechanisms.Comprehensive characterization reveals that potassium modification not only selectively alters the surface hydroxyl sites of alumina but also promotes strong interactions between the supported Pt-Sn species.By precisely controlling the synergistic interaction between K and Pt-Sn species,enhanced metal-support interactions and ultra-small Pt particle sizes can be achieved,leading to a significant improvement in propane dehydrogenation performance.Notably,the K loading exhibits an optimal range,as both excessive and insufficient amounts attenuate the interaction between the Pt-Sn complex and the support.These findings provide valuable theoretical foundations for the rational design and development of alumina-based catalysts.关键词
氧化铝/钾改性/表面羟基/金属活性位/丙烷脱氢Key words
alumina/potassium modification/surface hydroxyl groups/metal active sites/propane dehydrogenation分类
化学工程引用本文复制引用
袁茂杰,杨野,焦建豪,史梦璠,秦玉才,宋丽娟..Al2O3表面钾改性及对丙烷脱氢PtSn活性位的协同调控[J].燃料化学学报,2025,53(11):1641-1653,13.基金项目
The project was supported by National Natural Science Foundation of China(2023YFA1507700,U1908203),Liaoning Revitalization Talents Program(XLYC2203165),Natural Science Foundation of Liaoning Province(2024-BS-226)and Basic Scientific Research Project of Liaoning Province Department of Education(JYTQN2023342).国家自然科学基金(2023YFA1507700,U1908203),辽宁省兴辽英才计划(XLYC2203165),辽宁省自然科学基金(2024-BS-226)和辽宁省教育厅高校基本科研项目(JYTQN2023342)资助 （2023YFA1507700,U1908203）
