Support-Enhanced Selective Aerobic Alcohol Oxidation over Pd/Mesoporous Silicas

被引：155
作者：
Parlett, Christopher M. A. [1 ]
Bruce, Duncan W. [2 ]
Hondow, Nicole S. [3 ]
Lee, Adam F. [1 ]
Wilson, Karen [1 ]
机构：
[1] Cardiff Univ, Sch Chem, Cardiff Catalysis Inst, Cardiff CF10 3AT, S Glam, Wales
[2] Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England
[3] Univ Leeds, Sch Proc Environm & Mat Engn, Inst Mat Res, Leeds LS2 9JT, W Yorkshire, England
来源：
ACS CATALYSIS | 2011年 / 1卷 / 06期
基金：
英国工程与自然科学研究理事会;
关键词：
Palladium; alcohol; selective oxidation; mesoporous; silica; active site; PALLADIUM NANOPARTICLES; CATALYTIC-ACTIVITY; MESOPOROUS SILICA; SOLVENT; PHASE; CARBON; SITE;
D O I：
10.1021/cs200145n
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The influence of silica mesostructure upon the Pd-catalyzed selective oxidation of allylic alcohols has been investigated for amorphous and surfactant-templated SBA-15, SBA-16, and KIT-6 silicas. Significant rate enhancements can be achieved via mesopore introduction, most notably through the use of interconnected porous silica frameworks, reflecting both improved mass transport and increased palladium dispersion; catalytic activity decreases in the order Pd/KIT-6 approximate to Pd/SBA-16 > Pd/SBA-15 > Pd/SiO2. Evidence is presented that highly dispersed palladium oxide nanoparticles, not zerovalent palladium, are the catalytically active species.
引用
收藏
页码：636 / 640
页数：5
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