| 초록 |
A single stage water–gas shift reaction (WGS: CO + H2O → CO2 + H2) is crucial step in a fuel processor for compact fuel cell systems. The Cu loading of a cubic Ce0.8Zr0.2O2-supported Cu catalyst was optimized for a single-stage WGS reaction. The cubic phase of Cu–Ce0.8Zr0.2O2 catalyst showed the highest CO conversion as well as stability with time on stream due to high oxygen storage capacity. The remarkable catalytic performance of Cu–Ce0.8Zr0.2O2 is mainly ascribed to the synergy effect of Ce0.8Zr0.2O2 solid solution, resulting from high Cu dispersion, and enhanced reducibility of catalyst. Furthermore, Cu-loading on the CeO2‒ZrO2 structure improved the redox properties of the material and restricted the metal sintering, leading thus to a further improvement in the catalytic performance. In the present study, we focus on the optimum loading of Cu over cubic Ce0.8Zr0.2O2 support to further improve the performance of the catalyst. |
