Insights into the Mechanism of Methanol Steam Reforming Tandem Reaction over CeO₂ Supported Single-Site Catalysts

We demonstrated how the special synergy between a noble metal single site and neighboring oxygen vacancies provides an “ensemble reaction pool” for high hydrogen generation efficiency carbon dioxide (CO2) selectivity of tandem reaction: methanol steam reforming. Specifically, rate over Ru1/CeO2 catalyst is up to 9360 mol H2 per Ru hour (579 mLH2 gRu–1 s–1) with 99.5% CO2 selectivity. Reaction mechanism study showed that integration O facilitated reaction, which consisted dehydrogenation, water dissociation, subsequent gas shift (WGS) reaction. In addition, strength CO adsorption activation energy difference dehydrogenation WGS play important role in determining activity Our paves way further rational design catalysts at atomic scale. Furthermore, development such highly efficient selective evolution systems promises deliver desirable economic ecological benefits.