Liquid-Liquid Interface -Driven Reconstruction of CuAg Nanocomposites for Selective CO2 to C2H4 Electroreduction

IF 12.1 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Small Pub Date : 2025-10-03 DOI:10.1002/smll.202508803

Ji-Long Sang, Shi-Duo Zhang, Qing Liu, Ramadan A. Geioushy, Tahany Mahmoud, Yi Zhang, Min Liu

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引用次数: 0

Abstract

The electrochemical CO₂ reduction reaction (CO₂RR) to multicarbon products such as C₂H₄ is critical for sustainable energy conversion but remains a significant challenge. Cu-based nanocatalysts can facilitate C─C coupling for C₂₊ product generation, yet their catalytic efficiency and selectivity require further improvement. In this study, a liquid-liquid interface etching strategy is employed, using Cu nanocubes as templates and aqueous AgNO₃ as the etchant to synthesize well-defined CuAg nanocomposites. Among these, the optimized Cu₆₇Ag₃₃ composite nanocubes achieved a ethylene (C₂H₄) Faraday efficiency (FE) of 43.90% and a partial current density of 21.50 mA cm⁻²at −1.50 V_RHE. This work demonstrates a versatile approach to integrate secondary metal active sites via directional confined etching, while reconstructing catalytic interfaces to enhance C─C coupling and C₂H₄ selectivity. These findings provide a strategic framework for the rational design of efficient CO₂RR catalysts, advancing the development of sustainable carbon conversion technologies.

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液-液界面驱动的CuAg纳米复合材料选择性CO2 - C2H4电还原重建

多碳产物如C2H4的电化学CO2还原反应（CO2RR）对可持续能源转换至关重要，但仍是一个重大挑战。cu基纳米催化剂可以促进C─C偶联生成C2+产物，但其催化效率和选择性有待进一步提高。在本研究中，采用液-液界面蚀刻策略，以Cu纳米立方体为模板，水溶液AgNO3为蚀刻剂，合成了定义良好的CuAg纳米复合材料。其中，优化后的Cu67Ag33复合纳米立方的乙烯（C2H4）法拉第效率（FE）为43.90%，分电流密度为21.50 mA cm−2at−1.50 VRHE。这项工作展示了一种通用的方法，通过定向受限蚀刻来整合二级金属活性位点，同时重建催化界面以增强C─C耦合和C2H4选择性。这些发现为合理设计高效的CO2RR催化剂提供了战略框架，推动了可持续碳转化技术的发展。

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来源期刊

Small 工程技术-材料科学：综合

CiteScore

17.70

自引率

3.80%

发文量

1830

审稿时长

2.1 months

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