Journal
ORGANIC PROCESS RESEARCH & DEVELOPMENT
Volume 20, Issue 8, Pages 1424-1430Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.oprd.6b00103
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Funding
- Air Force Office of Scientific Research through the MURI program under AFOSR Award [FA9550-10-1-0572]
- Office of Science of the U.S. Department of Energy [DE-SC0004993]
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Theoretical investigations of electrochemical CO2 reduction have received increasing interest due its potential impact on renewable energy storage. We use density functional theory with an explicit solvent model of the electrochemical interface to calculate activation energy barriers for various proton-electron transfer elementary reactions steps for CO2 reduction on Au, Cu, and Pt surfaces. We find the protonation of unhydrogenated oxygen to be trivial compared to the protonation of carbon and R-OH species, which induces C-O scission. Our revised free energy diagram for the reduction of CO2 to methane on Cu(211) includes these observations and suggests that the dominant pathway includes *CHOH and *CH as intermediates rather than *OCH3.
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