(544eh) Computational and Experimental Investigations of Electrochemical CO2 Reduction on a Well-Defined Model Surface
AIChE Annual Meeting
2018
2018 AIChE Annual Meeting
Catalysis and Reaction Engineering Division
Poster Session: Catalysis and Reaction Engineering (CRE) Division
Wednesday, October 31, 2018 - 3:30pm to 5:00pm
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). We found that 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 pure bulk Cu catalyst, our results showed a better CH4 selectivity and activity over hydrogen evolution reaction (HER) with the introduction of CO-productive materials.10, 11 Such enhancement is attributed to the abundance of CO on Cu surface provided by Au or Ag and is supported by both DFT experimental evidence. 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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