Influence of Indium as a Promoter on the Stability and Selectivity of the Nanocrystalline Cu/CeO2 Catalyst for CO2 Hydrogenation to Methanol.

ACS Applied Materials & Interfaces
Sachin Kumar SharmaRajaram Bal

Abstract

Stable catalyst development for CO2 hydrogenation to methanol is a challenge in catalysis. In this study, indium (In)-promoted Cu nanoparticles supported on nanocrystalline CeO2 catalysts were prepared and explored for methanol production from CO2. In-promoted Cu catalysts with ∼1 wt % In loading showed a methanol production rate of 0.016 mol gCu-1 h-1 with 95% methanol selectivity and no loss of activity for 100 h. It is found that the addition of indium remarkably increases Cu dispersion and decreases Cu particle size. In addition led to an increased metal-support interaction, which stabilizes Cu particles against sintering during the reaction, leading to high stability and activity. In addition, density functional theory calculations suggested that the reaction is proceeding via reverse water gas shift (RWGS) mechanism where the presence of In stabilized intermediate species and lowered CO2 activation energy barriers.

References

Apr 21, 2012·Science·Malte BehrensRobert Schlögl
Aug 30, 2016·Journal of the American Chemical Society·Shyam KattelPing Liu
Sep 10, 2017·The Journal of Chemical Physics·Fahdzi MuttaqienYoshitada Morikawa
Jul 31, 2019·Nature Communications·Matthias S FreiJavier Pérez-Ramírez

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