丙烷无氧脱氢Co基催化剂的研究进展
Research progresson the dehydrogenation of propane over Co based catalysts
史琪 1王妍 1高照 1解则安 1赵震1
作者信息
- 1. 沈阳师范大学化学化工学院,能源与环境催化研究所,辽宁沈阳 110034
- 折叠
摘要
近年来Co基催化剂应用于丙烷脱氢反应展现出高于传统贵金属Pt基催化剂的催化活性,且逐渐成为研究热点.由于Co物种的多价态和多种配位的复杂性,导致其活性位结构和反应机理的认识不统一,尤其是在高温和还原性气氛(丙烷及其衍生物)条件下,CoOx活性位通常被不同程度地还原,容易转变为高度分散的Co2+物种或超小金属Co,通常被认为是高效的活性位点.根据催化剂载体不同,对Co基丙烷脱氢催化剂进行分类,总结不同配位环境、分散度、价态的Co物种及对丙烷脱氢C-H活化、丙烯选择性和催化剂稳定性的影响,为进一步设计高效的Co基丙烷脱氢催化剂提供参考.
Abstract
In recent years,Co-based catalysts have been applied to propane dehydrogenation,which exhibit higher catalytic activity than traditional precious metal Pt-based catalysts,and has gradually become a research focus.The complexity of multivalent states and multiple coordination of cobalt species leads to the inconsistent understanding of its active site structure and reaction mechanism.Especially under the reaction conditions of high temperature and reducing atmosphere(propane and its derivatives),CoOx active sites are usually partially reduced in different degrees and easily converted into highly dispersed Co2+species or ultra-small metal Co,which are usually considered as efficient active sites.In this paper,the Co-based propane dehydrogenation catalysts were classified according to the different catalyst support.Effects of different coordination environments,dispersions,and valence Co species on C-H activation,propylene selectivity and catalyst stability of propane dehydrogenation were systematically summarized,which provides a certain reference for further design of efficient Co-based propane dehydrogenation catalysts.
关键词
催化剂工程/丙烷脱氢/高温还原/CoOx/限域/配位不饱和活性位Key words
catalyst engineering/propane dehydrogenation/high temperature and reduction/CoOx/confinements/coordinatively unsaturated active sites引用本文复制引用
基金项目
国家自然科学基金资助项目(22372106)
国家自然科学基金资助项目(92145301)
国家自然科学基金资助项目(22002094)
国家自然科学基金资助项目(22102107)
辽宁省教育厅基础研究计划项目(JYTQN2023420)
出版年
2024
NETL
NSTL
万方数据