Morphology Manipulation of Copper Nanocrystals and Product Selectivity in the Electrocatalytic Reduction of Carbon Dioxide

Nian Tzu Suen, Zhong Ri Kong, Chia Shuo Hsu, Hsiao Chien Chen, Ching Wei Tung, Ying Rui Lu, Chung Li Dong, Chin Chang Shen, Jen Chieh Chung, Hao Ming Chen

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13 Citations (Scopus)

Abstract

We have revealed that cubelike and hexarhombic docadehedron-like Cu single crystals showed an enhancement of C2 products (ethylene and ethanol) while octahedron-like Cu nanoscale single crystals promoted C1 products of CO2 reduction. This product selectivity was revealed to be highly associated with the atomic arrangement on the surface. The remarkable high selectivity of ethanol (faraday efficiency of 25% with 14 mA/cm2, Jethanol ≈ 3.5 mA/cm2) for H-Cu was investigated and unraveled by using in situ X-ray absorption spectroscopy and density functional theory calculation. It was shown that the binding energy of adsorbed∗O atom on the surface is substantial, which causes bifurcation of the reaction pathway and leads to the formation of ethanol.

Original languageEnglish
Pages (from-to)5217-5222
Number of pages6
JournalACS Catalysis
Volume9
Issue number6
DOIs
Publication statusPublished - 2019 Jun 7

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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    Suen, N. T., Kong, Z. R., Hsu, C. S., Chen, H. C., Tung, C. W., Lu, Y. R., Dong, C. L., Shen, C. C., Chung, J. C., & Chen, H. M. (2019). Morphology Manipulation of Copper Nanocrystals and Product Selectivity in the Electrocatalytic Reduction of Carbon Dioxide. ACS Catalysis, 9(6), 5217-5222. https://doi.org/10.1021/acscatal.9b00790