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(111) 面向的Cu₂Mg金属间化合物与Cu₃-Mg CO₂电还原到乙醇的地点与工业电流密度

Chen Peng^1,2, Jiaxing Ma¹, Gan Luo³

¹Laboratory of Advanced Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China.

Angewandte Chemie (International ed. in English)

|March 4, 2024

概括

这项研究引入了一种新型的铜催化剂,用于有效的二氧化碳 (CO2) 电还原到乙醇. 新的催化剂显著提高了乙醇的选择性和生产率,克服了二氧化碳转化方面的关键挑战.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

乙醇从二氧化碳 (CO2) 的高效电合成受阻于高速率的低选择性.
基于铜的双金属催化剂是有希望的,但往往偏好乙烯或其他产品而不是乙醇.
土金属在二氧化碳电还原催化剂中未得到充分研究,尽管它们具有潜力.

研究的目的:

开发一种高度选择性的电催化剂,用于将二氧化碳转化为乙醇.
研究特定活性位点在促进乙醇形成中的作用.
为了实现高电流密度,以高效地生产乙醇.

主要方法:

一个 (111) 面面导向的纳米Cu2Mg金属间化合物与有序的Cu3-Mg位点的理性合成.
现场拉曼光谱分析反应中间体和表面覆盖.
密度函数理论 (DFT) 计算以了解反应机制和活性位点功能.

主要成果:

Cu2Mg(111) 催化剂在600 mA·cm-2.2时显示出高法拉代克效率的乙醇 (FE_C2H5OH) 76.2±4.8%.
达到了720±34mA·cm-2的乙醇部分电流密度 (c2H5OH) 峰值,显著优于传统的Cu2Mg催化剂.
确定了Cu3-Mg活性位点,可以增强CO表面覆盖面,促进CO-CO合,稳定乙醇合成的关键中间体.

结论:

这种Cu2Mg(111) 的金属间化合物有效地促进了CO2到乙醇的途径.
优化面向和特定的活性位点对于高选择性和高效率的二氧化碳电降低至关重要.
这种催化剂代表了二氧化碳转化技术的重大进步,以实现可持续的化学生产.

关键词:

(111) 方面的方面.二氧化碳的电还原 CO2 的电还原.Cu2Mg是金属间化合物中的一种.土金属是一种土金属.电子定位的电子定位

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