摘要
研究了Pt/MeM(Me=H,Cu,Ce)系列催化剂对CO的催化氧化活性,用热导-气相色谱同步跟踪CO在MeM和Pt/MeM上的TPD,发现CO_2脱附量大小及峰温次序与对CO的催化氧化活性一致。CO吸附达稳态后的TPSR(CO_2)研究表明CO_2的脱附峰温较TPD低,且其脱附量大小、峰温次序亦与对CO的催化氧化活性次序一致。
The catalytic activity for the oxidation of CO on the supported Pt/MeM(Me = H, Cu, Ce) catalysts was investigated. CO-TPD on MeM and Pt/MeM was monitored by TC-GC technique. It was found that the peak temperatures of desorbed CO2 were in agreement with the catalytic activities. The results of TPSR(CO2) after a steady-state adsorption of CO show that the peak temperatures of the desorbed CO2 were lower than those of the desorbed CO2 of CO-TPD and the desorbed amount of CO2 and the order of peak temperature well agreed with their activities. Furthermore, the probable mechanism of oxidation of CO over Pt/MeM catalysts was also proposed.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第3期371-374,共4页
Chemical Journal of Chinese Universities
关键词
CO
氧化
铂催化剂
丝光沸石
Mordenite, Temperature programmed desorption, Temperature programmed surface reaction
