摘要
明确催化剂的活性位本质和构建多相催化的结构和反应性能之间的准确关系是催化基础研究的重点,表面科学研究基于丰富的表征测试手段能够较好地在分子原子水平测定表面结构以明确催化剂活性位本质,并通过高压原位反应池测定相关催化反应性能,获得较可靠的催化剂构效关系。本文简要总结了近年来本人参与的几个模型催化研究例子,包括贵金属表面上CO和烷烃催化氧化的活性表面、纳米Au膜的制备和CO氧化的催化活性位、VO_x/Pt(111)上丙烷氧化的协同作用、Au Pd合金上醋酸乙烯酯合成Au的助催化作用、模型氧化物上纳米Pt的庚烷脱氢环化制甲苯的粒径关系等,以及相关模型催化研究技术的进展。
Understanding the nature of the active sites and the relationship between the catalyst structure and its performance are fundamental aspects of heterogeneous catalysis. With the development of modern surface science techniques, atomically resolved surface structures of heterogeneous catalysts and their properties can be studied with ease. Combined with an in situ high pressure cell, model catalysis studies can provide convincing information about the relationship between the catalyst structure and its performance. In this mini-review, several case studies of model catalysts have been summarized, including those of the active surfaces for CO and alkane oxidation using the Pt group metals as catalysts, the active site of gold nanoparticles for CO oxidation, synergistic effects between VOx and Pt for propane oxidation, promotional effects of Au in Pd-Au catalysts for vinyl acetate synthesis, structure-sensitivity of n-heptane dehydrocyclization on model oxide-supported Pt, as well as several significant improvements of the model catalysis techniques.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2017年第12期2424-2437,共14页
Acta Physico-Chimica Sinica
基金
973重大研究计划(2013CB933102)
国家自然科学基金(21273178
21573180
91545204)~~
关键词
模型催化
构效关系
CO氧化
烷烃临氧转化
原位谱学
Model catalysis study
Structure-activity
CO oxidation
Alkanes oxidation
In situspectroscopy