(686e) Demonstration of One-Pot Tandem Catalysis for Electrochemical CO2 Reduction to CH4 Using Both Quantum Mechanics and Experiment
AIChE Annual Meeting
2019
2019 AIChE Annual Meeting
Catalysis and Reaction Engineering Division
Electrochemical CO2 Reduction I: Fuels
Thursday, November 14, 2019 - 1:42pm to 2:00pm
Herein we report both computational and experimental investigations of electrochemical CO2 reduction on a well-defined model surface constructed with Cu and CO-productive materials (i.e. Au and Ag). The separation of reaction sites for CO2 reduction to CO as well as its subsequent reductions allows for the concurrent improvement for both processes. We found that the CO produced by Au or Ag would migrate to Cu with low activation energy and reduced further by Cu. Also, we proved that sufficient CO supply to Cu surface is critical for methane and ethylene production. Compared to a bare Cu surface, our results showed a better CH4 selectivity and activity over hydrogen evolution reaction (HER) with the introduction of CO-productive materials10, 11. Such enhancement is attributed to the abundance of CO on Cu surface provided by Au or Ag which is supported by both computational and experimental evidences. Based on these results, discussions on mechanism understandings and catalyst design principles are made for achieving more advanced CO2 electroreduction performance.
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