Efficient methanol steam reforming over ZnCeZrOx: the unique role of cerium

Metal oxide catalysts have been widely used in steam reforming of methanol (SRM), but they face the challenge of long-term running. Herein, we report a ZnCeZrOx catalyst that can operate in SRM stably at 400 degrees C. The H2 production rates of Zn1CeyZr9Ox catalysts are estimated to be in the range of 103.8 to 109.5 mu molH2 gcat-1 s-1 with methanol conversion rates varying in the range of 93.6% to 99.8% at a WHSV of 4.5 h-1. The enhanced activity and stability of the ZnZrOx solid solution catalyst is mainly attributed to the large number of oxygen vacancies for water activation and the stable solid solution structure induced by Ce doping. This work indicates that matched rates for H2O and methanol activation are essential in SRM.

Automated summary

A ZnCeZrOx catalyst has been developed for stable steam reforming of methanol at 400 degrees C. The catalyst exhibits high H2 production rates and methanol conversion rates, indicating enhanced activity and stability.