Ceo 2 /Cus Nanoplates Electroreduce Co 2 to Ethanol with Stabilized Cu + Species.
Zi YangDeguang JiZhi LiZidong HeYang HuJie YinYichao HouPinxian XiChun-Hua YanPublished in: Small (Weinheim an der Bergstrasse, Germany) (2023)
Copper-based electrocatalysts effectively produce multicarbon (C 2+ ) compounds during the electrochemical CO 2 reduction (CO 2 RR). However, big challenges still remain because of the chemically unstable active sites. Here, cerium is used as a self-sacrificing agent to stabilize the Cu + of CuS, due to the facile Ce 3+ /Ce 4+ redox. CeO 2 -modified CuS nanoplates achieve high ethanol selectivity, with FE up to 54% and FE C2+ ≈ 75% in a flow cell. Moreover, in situ Raman spectroscopy and in situ Fourier-transform infrared spectroscopy indicate that the stable Cu + species promote CC coupling step under CO 2 RR. Density functional theory calculations further reveal that the stronger * CO adsorption and lower CC coupling energy, which is conducive to the selective generation of ethanol products. This work provides a facile strategy to convert CO 2 into ethanol by retaining Cu + species.
Keyphrases
- aqueous solution
- metal organic framework
- density functional theory
- raman spectroscopy
- molecular dynamics
- single cell
- room temperature
- gold nanoparticles
- quantum dots
- genetic diversity
- cell therapy
- highly efficient
- oxide nanoparticles
- visible light
- reduced graphene oxide
- big data
- energy transfer
- mesenchymal stem cells
- mass spectrometry
- simultaneous determination
- molecularly imprinted
- dna methylation