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Direct OC-CHO coupling towards highly C2+ products selective electroreduction over stable Cu0/Cu2+ interface.

Xin Yu Zhang1, Zhen Xin Lou1, Jiacheng Chen2

  • 1Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.

Nature Communications
|November 23, 2023
PubMed
Summary

This study introduces copper phosphate electrocatalysts for efficient carbon dioxide (CO2) electroreduction to multicarbon products. These catalysts achieve high selectivity for C2+ products via a novel OC-CHO coupling pathway.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Catalysis

Background:

  • Carbon dioxide (CO2) electroreduction to multicarbon (C2+) products offers a sustainable route for CO2 utilization.
  • Achieving high C2+ selectivity (>90%) remains challenging due to inefficient C-C bond coupling.

Purpose of the Study:

  • To develop novel electrocatalysts for efficient CO2 electroreduction to C2+ products.
  • To investigate the mechanism of C-C bond coupling for enhanced selectivity.

Main Methods:

  • Electrocatalysis using copper phosphate-based (CuPO) materials.
  • In situ spectroscopy and theoretical calculations to study reaction mechanisms.
  • Electrochemical performance evaluation in H-cell and flow cell configurations.

Main Results:

  • Stable Cu0/Cu2+ interfaces were identified in CuPO electrocatalysts.
  • A low-energy OC-CHO coupling pathway was confirmed for C2+ production.
  • A Faradaic efficiency (FE) of 69.7% for C2H4 was achieved in an H-cell.
  • A significant FE_C2+ of 90.9% was obtained at -350 mA cm-2 in a flow cell.

Conclusions:

  • Stable Cu0/Cu2+ interfaces are crucial for facilitating efficient C-C bond coupling in CO2 electroreduction.
  • CuPO electrocatalysts demonstrate high activity and selectivity for valuable C2+ products.
  • This work provides a new strategy for designing electrocatalysts with synergistic active sites for CO2 conversion.