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<p>The climate crisis caused by excessive carbon dioxide (CO<sub>2</sub>) emissions urgently call for efficient electrocatalytic reduction technology to convert CO<sub>2</sub> into high value-added products. In this study, nickel polyphthalocyanine (NiPPc) electrocatalysts with different copper (Cu) doping amounts (10–90&#xa0;wt%) were prepared by solvothermal method, Combining X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and other characterization and electrochemical testing, it is found that: Doping with 10 wt% Cu significantly enhanced catalytic activity, achieving a current density of 325&#xa0;mA&#xa0;cm<sup>−2</sup> at −&#xa0;0.6&#xa0;V (vs. RHE)—2.8 times that of the sample; 50 wt% Cu doping optimized the Cu–N<sub>4</sub> active sites, yielding a carbon monoxide (CO) Faraday efficiency of up to 95% at −&#xa0;1.0&#xa0;V; 30 wt% Cu-doped catalyst can generate CO: H<sub>2</sub> = 1:1 syngas, A controllable catalyst design strategy is provided for CO<sub>2</sub> electrocatalytic reduction.</p> Graphical Abstract <p></p>

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Effects of Cu Doping on NiPPc Electrocatalysts for CO2 Electrocatalytic Reduction

  • 期刊论文

  • 发表日期：

    2026年1月14日

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  • Hongna Cheng,
  • Chaoyong Wang,
  • Zihan Wang,
  • Weikang Peng,
  • Jiayi Hou,
  • Shiting Tian,
  • Zixuan Shi,
  • Ying Liu,
  • Fengfeng Li,
  • Mingxi Zhang

摘要

The climate crisis caused by excessive carbon dioxide (CO2) emissions urgently call for efficient electrocatalytic reduction technology to convert CO2 into high value-added products. In this study, nickel polyphthalocyanine (NiPPc) electrocatalysts with different copper (Cu) doping amounts (10–90 wt%) were prepared by solvothermal method, Combining X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and other characterization and electrochemical testing, it is found that: Doping with 10 wt% Cu significantly enhanced catalytic activity, achieving a current density of 325 mA cm−2 at − 0.6 V (vs. RHE)—2.8 times that of the sample; 50 wt% Cu doping optimized the Cu–N4 active sites, yielding a carbon monoxide (CO) Faraday efficiency of up to 95% at − 1.0 V; 30 wt% Cu-doped catalyst can generate CO: H2 = 1:1 syngas, A controllable catalyst design strategy is provided for CO2 electrocatalytic reduction.

Graphical Abstract