载体对负载PdO催化剂的CO氧化活性的影响

摘要

cqvip:The catalytic activities of the supported PdO catalysts were found to be dependenton the kind of the support as follows: CeO2>ZrO2>TiO2>Al2O3>SnO2>ZSM-5>SiO2.The reduction state of PdO in the catalyst played an important role in the oxidation activityof the catalyst. PdO/CeO2 was inferior to PdO/Al2O3 in heat-stability, but its activity for COoxidation was higher than PdO/Al2O3, after it had been calcinated at 1200 ℃ for 4 h.