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<p>The electrochemical reduction of CO<sub>2</sub> stands out as a groundbreaking approach to transform CO<sub>2</sub> into valuable fuels and chemicals, heralding the prospect of a carbon-neutral energy landscape and making strides in climate change mitigation. Among the various catalytic systems available, bimetallic alloys created through the intentional integration of metals showcase highly tunable active sites and remarkable catalytic performance. This research presents the innovative design of bimetallic CuSn alloys derived from metal-organic frameworks, leveraging their engineered surfaces and synergistic metal interactions to finely tune product selectivity. Cu drives alcohol formation, while Sn enhances formate production by stabilizing critical reaction intermediates and effectively suppressing the competing hydrogen evolution reaction. Notably, our Cu-rich CuSn/C-A catalyst achieves an impressive Faradaic efficiency of 71.1% for methanol, while the Sn-rich CuSn/C-B sets a near-record with 89.16% FE for formic acid in 0.1&#xa0;M KHCO<sub>3</sub> at -0.7&#xa0;V vs. RHE. These significant results highlight the critical role of alloy composition in directing CO<sub>2</sub> reduction selectivity, offering a powerful framework for the strategic design of high-performance, adaptable electrocatalysts.</p>

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Structure-Dependent Electrocatalytic CO2 Reduction Over Carbon-Supported CuSn Intermetallic Nano-Alloys

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • Ankur Chanda,
  • Abbidi Shivani Reddy,
  • Sayan Kanungo,
  • Sounak Roy

摘要

The electrochemical reduction of CO2 stands out as a groundbreaking approach to transform CO2 into valuable fuels and chemicals, heralding the prospect of a carbon-neutral energy landscape and making strides in climate change mitigation. Among the various catalytic systems available, bimetallic alloys created through the intentional integration of metals showcase highly tunable active sites and remarkable catalytic performance. This research presents the innovative design of bimetallic CuSn alloys derived from metal-organic frameworks, leveraging their engineered surfaces and synergistic metal interactions to finely tune product selectivity. Cu drives alcohol formation, while Sn enhances formate production by stabilizing critical reaction intermediates and effectively suppressing the competing hydrogen evolution reaction. Notably, our Cu-rich CuSn/C-A catalyst achieves an impressive Faradaic efficiency of 71.1% for methanol, while the Sn-rich CuSn/C-B sets a near-record with 89.16% FE for formic acid in 0.1 M KHCO3 at -0.7 V vs. RHE. These significant results highlight the critical role of alloy composition in directing CO2 reduction selectivity, offering a powerful framework for the strategic design of high-performance, adaptable electrocatalysts.