Issue 1, 2021

CO2 hydrogenation over heterogeneous catalysts at atmospheric pressure: from electronic properties to product selectivity

Abstract

The production of chemicals and fuels via chemical reduction of CO2 by green H2 represents a promising means of mitigating CO2 emissions. The heterogeneous catalytic reaction of CO2 and H2 under atmospheric pressure primarily produces CO and CH4, while CH3OH and C2+ hydrocarbons are obtained at high pressure. Improving the catalytic selectivity improves the energy efficiency for a given yield and greatly reduces the downstream separation costs. In this work, we review the recent progress in tuning the selectivity of CO2 hydrogenation over heterogeneous catalysts at atmospheric pressure. We describe fundamental insights into the relationships among the electronic properties of active metals, the binding strengths of key intermediates, and the CO2 hydrogenation selectivity. The manipulation of the electronic properties, and consequently the product selectivity, can be achieved mainly by controlling the particle size, bimetallic effects, and strong metal–support interactions. Finally, we discuss challenges and opportunities for the rational design of CO2 hydrogenation catalysts with high activity and desired selectivity.

Graphical abstract: CO2 hydrogenation over heterogeneous catalysts at atmospheric pressure: from electronic properties to product selectivity

Article information

Article type
Perspective
Submitted
17 10 2020
Accepted
24 11 2020
First published
24 11 2020

Green Chem., 2021,23, 249-267

Author version available

CO2 hydrogenation over heterogeneous catalysts at atmospheric pressure: from electronic properties to product selectivity

Y. Wang, L. R. Winter, J. G. Chen and B. Yan, Green Chem., 2021, 23, 249 DOI: 10.1039/D0GC03506H

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