In situ IR, pulse reaction and TPD-ITD study of catalytic performance of room-temperature carbon monoxide oxidation on supported gold catalysts.
With in situ IR, two different CO adsorption bands were detected on various chemical state gold catalysts. One band is attributed to the linear CO on an oxidized gold catalyst(2100 cm-1), the other one is ascribed to the bridged CO on metallic gold (2085 cm-1), CO pulse reaction showed that Au/Fe2O3 catalyst had a room-temperature activity even in the presence of moisture. The produced CO2 was detained and more easily desorbed from supported gold catalyst than support oxide. TPD-IDT results indicated that the O2- superoxide ions are the possible active oxygen species.
Hao
Zheng-ping
ZP
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. zpinghao@mail.rcees.ac.cn
Zhang
Shi-chao
SC
Liu
Zhi-ming
ZM
Zhang
Hui-ping
HP
D000327:Adsorption; D002248:Carbon Monoxide / Q000737:chemistry*; D002384:Catalysis; D006046:Gold / Q000737:chemistry*; D010084:Oxidation-Reduction; D010316:Particle Size; D013055:Spectrophotometry, Infrared / Q000379:methods*
D006046:Gold; D002248:Carbon Monoxide