CAJ | 학술논문

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.
채용간단적화학환원법제비료구유불동형모특정적Pt납미입자,병이용침지법장기부재도SiO2상,득도료입자분산균일적부재형Pt최화제,고찰료기최화CO양화반응성능.X사선형광분석、X사선광전자능보、홍외광보화투사전경결과표명,Pt/SiO2모형최화제상CO양화활성적불동래원우Pt납미입자불동정면적공헌,즉Pt납미입자적정형대CO재최화제상적흡부화Pt/SiO2적CO양화활성구유중요적영향.
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 supported catalysts.CO oxidation was used as the probe to investigate the catalytic activities of these Pt/SiO2 model catalysts.X-ray fluorescence,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.