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Boosting electrocatalytic CO2–to–ethanol production via asymmetric C–C coupling

Author

Listed:
  • Pengtang Wang

    (The University of Adelaide
    Xiamen University)

  • Hao Yang

    (Soochow University)

  • Cheng Tang

    (The University of Adelaide)

  • Yu Wu

    (Soochow University)

  • Yao Zheng

    (The University of Adelaide)

  • Tao Cheng

    (Soochow University)

  • Kenneth Davey

    (The University of Adelaide)

  • Xiaoqing Huang

    (Xiamen University)

  • Shi-Zhang Qiao

    (The University of Adelaide)

Abstract

Electroreduction of carbon dioxide (CO2) into multicarbon products provides possibility of large-scale chemicals production and is therefore of significant research and commercial interest. However, the production efficiency for ethanol (EtOH), a significant chemical feedstock, is impractically low because of limited selectivity, especially under high current operation. Here we report a new silver–modified copper–oxide catalyst (dCu2O/Ag2.3%) that exhibits a significant Faradaic efficiency of 40.8% and energy efficiency of 22.3% for boosted EtOH production. Importantly, it achieves CO2–to–ethanol conversion under high current operation with partial current density of 326.4 mA cm−2 at −0.87 V vs reversible hydrogen electrode to rank highly significantly amongst reported Cu–based catalysts. Based on in situ spectra studies we show that significantly boosted production results from tailored introduction of Ag to optimize the coordinated number and oxide state of surface Cu sites, in which the *CO adsorption is steered as both atop and bridge configuration to trigger asymmetric C–C coupling for stablization of EtOH intermediates.

Suggested Citation

  • Pengtang Wang & Hao Yang & Cheng Tang & Yu Wu & Yao Zheng & Tao Cheng & Kenneth Davey & Xiaoqing Huang & Shi-Zhang Qiao, 2022. "Boosting electrocatalytic CO2–to–ethanol production via asymmetric C–C coupling," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-31427-9
    DOI: 10.1038/s41467-022-31427-9
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    5. Haifeng Shen & Huanyu Jin & Haobo Li & Herui Wang & Jingjing Duan & Yan Jiao & Shi-Zhang Qiao, 2023. "Acidic CO2-to-HCOOH electrolysis with industrial-level current on phase engineered tin sulfide," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
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    7. Jiaqi Feng & Libing Zhang & Shoujie Liu & Liang Xu & Xiaodong Ma & Xingxing Tan & Limin Wu & Qingli Qian & Tianbin Wu & Jianling Zhang & Xiaofu Sun & Buxing Han, 2023. "Modulating adsorbed hydrogen drives electrochemical CO2-to-C2 products," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    8. Jiahui Bi & Pengsong Li & Jiyuan Liu & Shuaiqiang Jia & Yong Wang & Qinggong Zhu & Zhimin Liu & Buxing Han, 2023. "Construction of 3D copper-chitosan-gas diffusion layer electrode for highly efficient CO2 electrolysis to C2+ alcohols," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    9. Jiaqi Feng & Limin Wu & Xinning Song & Libing Zhang & Shunhan Jia & Xiaodong Ma & Xingxing Tan & Xinchen Kang & Qinggong Zhu & Xiaofu Sun & Buxing Han, 2024. "CO2 electrolysis to multi-carbon products in strong acid at ampere-current levels on La-Cu spheres with channels," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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