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在氧化物衍生铜中保留的氧气调节促进CO₂电还原向多碳产品的电还原

Huan Wang¹, Hai Xiang Yang¹, Yi Ning Xu¹

¹Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.

Angewandte Chemie (International ed. in English)

|April 9, 2025

概括

薄氧化物衍生铜纳米片 (1.6纳米) 保留氧气,促进电化学二氧化碳的减少,以高效率的有价值的多碳产品.

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:

电化学二氧化碳减排 (CO2R) 为可再生能源储能提供了一条途径.
氧化物衍生的铜 (OD-Cu) 对多碳 (C2+) 产品选择性有希望.
在重建过程中控制OD-Cu中的残留氧是关键的,但具有挑战性.

研究的目的:

研究OD-Cu中厚度依赖的剩余氧在CO2R中的作用.
了解氧气保留如何影响C2+选择性.
优化OD-Cu催化剂,以实现高效的多碳生产.

主要方法:

合成不同厚度的CuO纳米板.
电化学二氧化碳减排实验.
长期的分子动力学模拟.
结构特征 (例如XPS,TEM) 和电化学分析.

主要成果:

1.6纳米的CuO预催化剂保留了最佳的氧气,增强了C2+的选择性.
对于C2+产品的法拉戴效率在广泛的电流密度范围 (300-700 mA cm-2) 上达到了80%左右.
模拟显示,随着氧气去除的增加,Cu-CuO稳定性得到了增强,有利于C2+通路 (*CHO形成和*OC-CHO合).

结论:

剩余氧在CO2R的OD-Cu性能中起着至关重要的作用.
在重建堆叠的纳米片中优化了氧气保留,增强了C2+产品的形成.
这项工作为设计具有改善氧气管理的OD-Cu催化剂提供了洞察力,以实现高效的C2+合成.

关键词:

分子动态模拟分子动态模拟多碳产品是多碳产品.由氧化物衍生的铜.重建重建的重建工作留存的氧气被保留在其中.

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