Initial research on the oxidation capacity of 1%CuO – 6CeO2 – 4ZrO2 catalyst by TPR-H2 for CO clean up reaction in H2-rich stream (CO-PROX) ☆

The 1%CuO – 6CeO2 – 4ZrO2 catalyst were synthesized by sol-gel method with two different procedures: (i) bringing CuO on CeO2-ZrO2 support, (ii) sol-gel at the same time CuO-CeO2-ZrO2. Their catalyst will be examined in the preferential oxidation of carbon monoxide to remove a small quantity of CO in an H2-rich stream (the new direction research in Viet Nam), fueling the proton exchange membrane fuel cell (PEMFC) energy system. The findings of the TPR-H2 experiment indicate that the catalyst produced through the (i) method exhibits an α reduction peak at 174°C, which shows the effective dispersion of copper species. In combination with EPR results, the author anticipates a significant dispersion arising from isolated copper, recognized as a pivotal site in the CO-PROX reaction per numerous reputable studies. The method (ii) synthesized the catalyst does not provide a clear indication of the oxidation behavior of Cu-species. Therefore, it can be inferred that this catalyst is inappropriate for the low-temperature CO-PROX reaction.