Patent ID: 7147680

Claim:
A hydrogen generator comprising: a reformed gas inlet for introducing a stream of reformed gas, the reformed gas comprising hydrogen, carbon monoxide, and steam; a shifting unit for reducing the concentration of carbon monoxide in the reformed gas, the shifting unit comprising a carbon monoxide catalyst body for removing carbon monoxide with a shifting reaction, and a reformed gas outlet for discharging the reformed gas from said shifting unit: wherein: said carbon monoxide shifting catalyst body comprises at least one noble metal selected from the group consisting of Pt, Pd, Rh and Ru; said noble metal is supported on a carrier comprising a complex oxide of Zr compounded with at least one element selected from the group consisting of Mo, W, and Re; the atomic ratio of the total amount of Mo, W, and Re to the total amount of Mo, W, Re, and Zr in the complex oxide is 0.01 to 0.90; and said complex oxide is a solid solution.