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<p>Efficient methods for carbon dioxide reduction reactions (ECO<sub>2</sub>RR) utilizing electrical energy are of paramount importance, yet the design of catalysts remains a pivotal factor in attaining highly effective ECO<sub>2</sub>RR processes. To circumvent the reliance on precious metals, it is imperative to attain a high degree of selectivity towards formic acid (HCOOH) through the regulation of Cu metal. Zinc (Zn), being cost-effective and possessing favorable binding energy towards *COOH, emerges as a promising alternative. To further augment the catalytic activity, we employed the electrostatic self-adsorption capability of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>MXene to anchor a Cu-Zn bimetallic structure onto its surface. The results demonstrate that the Cu-Zn bimetallic structure is anchored to the Ti vacancies and coupled with the surface functional groups of MXene. The incorporation of Zn markedly enhances the electron transfer to Cu, leading to a notable 87% selectivity for formic acid and a remarkable stability of 16&#xa0;h. This study elucidates a novel approach for the modification of MXene-based bimetallic catalysts, thereby establishing a foundation for the development of an efficient ECO<sub>2</sub>RR process.</p> Graphical abstract <p></p>

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Cu-Zn bimetal modification of MXene for efficient electrocatalytic carbon dioxide reduction of formic acid

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • A. Gengxiong,
  • Yonghui Wang,
  • Liang Wu,
  • Yan Ma,
  • Shangwen Ma,
  • Zuqi Li,
  • Keliang Wu

摘要

Efficient methods for carbon dioxide reduction reactions (ECO2RR) utilizing electrical energy are of paramount importance, yet the design of catalysts remains a pivotal factor in attaining highly effective ECO2RR processes. To circumvent the reliance on precious metals, it is imperative to attain a high degree of selectivity towards formic acid (HCOOH) through the regulation of Cu metal. Zinc (Zn), being cost-effective and possessing favorable binding energy towards *COOH, emerges as a promising alternative. To further augment the catalytic activity, we employed the electrostatic self-adsorption capability of Ti3C2TxMXene to anchor a Cu-Zn bimetallic structure onto its surface. The results demonstrate that the Cu-Zn bimetallic structure is anchored to the Ti vacancies and coupled with the surface functional groups of MXene. The incorporation of Zn markedly enhances the electron transfer to Cu, leading to a notable 87% selectivity for formic acid and a remarkable stability of 16 h. This study elucidates a novel approach for the modification of MXene-based bimetallic catalysts, thereby establishing a foundation for the development of an efficient ECO2RR process.

Graphical abstract