Scholarlink

<p>In this study, AgCuCe/C catalysts were synthesized via vacuum ion-beam sputtering followed by electrochemical dealloying. The catalysts were comprehensively characterized using x-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), inductively coupled plasma optical emission spectroscopy (ICP-OES), x-ray photoelectron spectroscopy (XPS), gas chromatography (GC), and electrochemical measurements. We systematically investigated how the optimized surface morphology, phase composition, and elemental valence states affect the CO<sub>2</sub> electroreduction performance and the distribution of gaseous products. Electrochemical dealloying promoted the leaching of a portion of Cu from the catalyst surface, forming Ag-Cu and Ag-Cu<sub>2</sub>O heterointerfaces, thereby exposing abundant active sites for CO<sub>2</sub> adsorption and reaction. Notably, dealloying in an HCl + FeCl<sub>3</sub> electrolyte resulted in a refined and uniformly distributed nanocube architecture on the catalyst surface. This morphology further modulates the electronic structure at the Ag-Cu and Ag-Cu<sub>2</sub>O interfaces, facilitating electron transfer from Cu to Ag and enhancing surface CO<sub>2</sub> adsorption. Under an applied potential of − 0.6&#xa0;V versus RHE, the Faradaic efficiencies for CO and CH<sub>4</sub> increased by 188.8% and 327.3%, respectively, while H<sub>2</sub> production decreased by 56.1% compared with the non-dealloyed sample. These improvements substantially enhance CO<sub>2</sub>RR selectivity and suppress the competing hydrogen evolution reaction. Overall, these findings provide new insights and experimental guidance for the rational design of high-performance electrocatalysts for CO<sub>2</sub> reduction.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Electrochemical Dealloying of AgCuCe/C Catalysts for Enhanced CO2 Reduction Performance

  • 期刊论文

  • 发表日期：

    2026年2月2日

查看全文
  • Jiahao Han,
  • Linhan Zan,
  • Huaihang Fan,
  • Shaqin Wang,
  • Ji Liu,
  • Xiang Su,
  • Xiaofeng Chen,
  • Bin Yang

摘要

In this study, AgCuCe/C catalysts were synthesized via vacuum ion-beam sputtering followed by electrochemical dealloying. The catalysts were comprehensively characterized using x-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), inductively coupled plasma optical emission spectroscopy (ICP-OES), x-ray photoelectron spectroscopy (XPS), gas chromatography (GC), and electrochemical measurements. We systematically investigated how the optimized surface morphology, phase composition, and elemental valence states affect the CO2 electroreduction performance and the distribution of gaseous products. Electrochemical dealloying promoted the leaching of a portion of Cu from the catalyst surface, forming Ag-Cu and Ag-Cu2O heterointerfaces, thereby exposing abundant active sites for CO2 adsorption and reaction. Notably, dealloying in an HCl + FeCl3 electrolyte resulted in a refined and uniformly distributed nanocube architecture on the catalyst surface. This morphology further modulates the electronic structure at the Ag-Cu and Ag-Cu2O interfaces, facilitating electron transfer from Cu to Ag and enhancing surface CO2 adsorption. Under an applied potential of − 0.6 V versus RHE, the Faradaic efficiencies for CO and CH4 increased by 188.8% and 327.3%, respectively, while H2 production decreased by 56.1% compared with the non-dealloyed sample. These improvements substantially enhance CO2RR selectivity and suppress the competing hydrogen evolution reaction. Overall, these findings provide new insights and experimental guidance for the rational design of high-performance electrocatalysts for CO2 reduction.