Abstract
Abstract Co3O4/NP-ZrO2, Co3O4/NP-CeO2 and Co3O4/NP-Ce0.8Zr0.2O2 catalysts were prepared via a reverse microemulsion/incipient wetness impregnation (RM–IWI) method. The catalytic properties for CO preferential oxidation (CO PROX) reaction in H2-rich stream were investigated. The Co3O4/NP-Ce0.8Zr0.2O2 catalyst with 1.8 wt.% Co3O4 loading has exhibited higher catalytic activity than that of the other two catalysts. The higher catalytic activity might be attributed to the combination effect of the highly dispersed cobalt oxide, the improvement in CeO2 reducibility due to ZrO2 incorporation in CeO2 structures, and the strong cobalt oxide-support interaction.
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