Copper-Based Mixed Oxides Catalyst of Water-Gas Shift Reaction for Fuel Cells: The Role of Alkali Charge

摘要

The effects of alkali charge on the activity and stability of copper-based mixed oxides catalyst for the water-gas shift reaction (WGSR) were investigated. Activity tests showed that the copper-based mixed oxides catalyst while the 2[NaOH]/[Cu~(2+)+Mn~(2+)] is above 1.2 displayed higher activity and better stability than that of others catalysts. The BET, XRD and TPR results revealed that the Cu-Mn catalyst while the 2[NaOH]/[Cu~(2+)+Mn~(2+)] is above 1.2 led to higher surface area, a more stable catalyst structure and suitable reduction performance, in turn leading to better catalytic behavior for the Cu-Mn catalyst.