Bimetallic Catalysts for CO2 Conversion

Abstract

CO2 hydrogenation to C1 chemicals has attracted significant interest due to concerns about global warming and the need to reduce the concentration of CO2 in the atmosphere. Converting the CO2 to a useful product is particularly attractive over the alternative underground storage. Bimetallic catalysts have shown big potential in CO2 hydrogenation with enhancing performance and high economic efficiency compared to monometallic catalysts which suffer from the limitations of carbon deposition, easy sintering, and coke formation of monometallic catalysts. Continuous efforts in the field of heterogeneous catalysis have revealed that the CO2 hydrogenation is structure-sensitive in monometallic catalysts. However, researching the structure-performance relationship fundamentally in bimetallic catalysts is a big challenge because the well-defined bimetallic structures and the corresponding mechanism are more complex than monometallic ones.

This thesis gives a comprehensive understanding of the structure-performance relationship of the supported bimetallic catalysts for CO2 hydrogenation, from the bimetallic combinations, bimetal atomic arrangement in nanoparticles, and the alloy-support interface three muti-scale perspectives.