Zr-Modified SBA-15 Supported Ni Catalysts with Excellent Catalytic Performance of CO Selective Methanation in H 2 -Rich Fuels

CO selective methanation is a promising route for the purification of CO in H 2 -rich gas for on-board H 2 -based fuel cells. Herein, we synthesized a Zr-modified SBA-15 supported Ni catalyst, which exhibits both high catalytic performance, deep-removing CO concentration to below 10 ppm with a selectivity higher than 50% in a very low-temperature range (170–220 °C), and long-term stability. The results of XRD, XPS, TPR, TPD and TEM characterizations reveal that the doping of Zr not only improves the dispersion of Ni species, enhances the CO adsorption, but also suppresses the CO 2 adsorption, resulting in the prominent catalytic performance. Graphical Abstract