Enhancing Stability of Cu/ZnO Catalysts in the CO₂ Hydrogenation to Methanol by the Addition of MoO₃ and ReO₃ Promoters.

ABSTRACT: The catalytic hydrogenation of CO₂ to methanol represents a promising route for carbon recycling and hydrogen storage. However, the stability of current catalysts remains one of the main technological challenges. In this work, we investigate the promotional effect of MoO₃ and ReO₃ on Cu/ZnO-based catalysts with metal loadings ranging from 0.06 to 3.5 wt%. Spectroscopic (XPS and in situ Raman) and kinetic studies reveal that the incorporation of ultra-low promoter amounts (0.06 wt%) enhances methanol productivity, whereas higher concentrations lead to partial blocking of the active copper sites. Rhenium promotes the stabilization of Cu⁺ species, while molybdenum establishes strong Cu-Mo interactions that modify the reducibility and surface composi

SUBMITTER: Soriano Rodriguez J 

PROVIDER: S-EPMC12655111 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature