Reverse Water-Gas Shift Reaction Catalyzed by Ruthenium Cluster Anions

Abstract Reverse water-gas shift reaction (H2 + CO2 → CO + H2O) was homogeneously catalyzed by anionic Ru cluster in the presence of bis(triphenylphosphine)imminium chloride ([PPN]Cl). The catalytic reaction was estimated to proceed via dehydrogenation of hydride cluster, followed by coordination of CO2 and electrophilic attack of proton on its oxygen atom in the presence of chloride anion.