Hydrogen Spillover Mechanisms on Copper on Zinc Oxide-Based Catalysts for Carbon Dioxide Hydrogenation to Methanol

This literature review examines the hydrogen spillover mechanisms on copper on zinc oxide (Cu/ZnO)-based catalysts for CO 2 hydrogenation to methanol. The production of methanol from CO 2 is an attractive process for mitigating greenhouse gas emissions and producing a valuable chemical feedstock. Cu/ZnO-based catalysts are known to exhibit high activity and selectivity towards methanol production and the hydrogen spillover effect is believed to play a crucial role in their performance. The review discusses the current understanding of the hydrogen spillover mechanism, including the nature of the active sites and the factors that affect spillover efficiency. It also summarises recent advances in catalyst design, such as the use of promoters and dopants, to enhance the hydrogen spillover effect and improve catalytic performance. This article provides a comprehensive overview of the hydrogen spillover mechanism on Cu/ZnO-based catalysts for CO 2 hydrogenation to methanol, highlighting the potential of this technology for sustainable methanol production.