Water gas shift reaction over the CuB2O4 spinel catalysts

Cu-based mixed oxides were prepared by a co-precipitation method and characterized by XRD analysis, BET and H 2 -TPR. For all catalytic systems, it was found by XRD analysis that the spinel phase is the majority phase. Catalysts were tested for the production of hydrogen via the water gas shift reaction between 150 and 250 °C. It was demonstrated by TPR that Cu–Zn–Al and Cu–Al were easily reduced. This may be responsible for relatively high catalytic activity in comparison with the results obtained by Cu–Co and Zn–Al catalysts prepared by the same method. The oxide systems can be ranked as follows: Cu–Zn–Al > Cu–Al > Cu–Mn, Cu–Cr > Cu–Fe ≫ Zn–Al > Cu–Co at 250 °C.