摘要
采用简单的化学还原法制备了具有不同形貌特征的Pt纳米粒子,并利用浸渍法将其负载到SiO2上,得到了粒子分散均一的负载型Pt催化剂,考察了其催化CO氧化反应性能.X射线荧光分析、X射线光电子能谱、红外光谱和透射电镜结果表明,Pt/SiO2模型催化剂上CO氧化活性的不同来源于Pt纳米粒子不同晶面的贡献,即Pt纳米粒子的晶型对CO在催化剂上的吸附和Pt/SiO2的CO氧化活性具有重要的影响.
In order to investigate the influence of particle morphology on the catalytic activity of supported Pt model catalyst,platinum nanoparticles（NPs）with different morphologies were synthesized by a chemical method and loaded onto SiO2 to give well-defined sup-ported catalysts.CO oxidation was used as the probe to investigate the catalytic activities of these Pt/SiO2 model catalysts.X-ray fluores-cence,X-ray photoelectron spectroscopy,diffuse reflectance Fourier transform infrared spectroscopy,and transmission electron microscopy characterization demonstrated that the different activities of these Pt/SiO2 catalysts were due to different crystal surfaces,which strongly influenced the adsorption and oxidation of CO on the Pt NPs.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第8期1329-1335,共7页
基金
supported by the National Natural Science Foundation of China(20877006and20833011)
Natural Science Foundation of Beijing Municipality(2101002)~~
关键词
铂纳米粒子
形貌效应
结构敏感反应
一氧化碳氧化
platinum nanoparticle
morphology effect
structure sensitive reaction
carbon monoxide oxidation
