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工业级电触媒CO₂到CO 通过2D中等孔Ni单原子催化剂实现

Yao Ma¹, Taishi Xiao¹, Kerun Zhu¹

¹Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai, 200433, China.

Angewandte Chemie (International ed. in English)

|December 4, 2024

概括

研究人员开发了2D半孔单原子催化剂,用于高效的电催化二氧化碳减排. 这种进步为工业应用提供了高选择性和稳定性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

电催化二氧化碳减排 (eCO2RR) 对碳利用至关重要,但在效率,选择性和稳定性方面面临挑战.
开发先进的催化剂是克服工业可行性的这些障碍的关键.

研究的目的:

在添加碳框架内合成和表征新的2D半孔单原子催化剂 (Ni-SACs).
评估这些Ni-SACs在电催化二氧化碳减排中的性能,重点关注效率,选择性和稳定性.

主要方法:

一个自下而上的接口组装策略被用来创建2D半孔Ni-N-C催化剂.
鉴定了催化剂的结构,包括其超薄厚度 (~6.7 nm),中孔尺寸 (5-40 nm) 和高表面积.
在一个流动电池中测试了电催化性能,包括50小时的稳定性测试和用于大规模运输的有限元素分析.

主要成果:

合成的2D半孔Ni-SACs表现出高密度 (~6.0 wt%) 的可访问的Ni单原子位点.
实现了高电流密度为446mA cm-2的高电流密度,具有超过95%的CO选择性.
在50小时的连续电解中表现出极好的稳定性和42%的能源效率.

结论:

2D半孔设计显著提高了二氧化碳扩散和质量传输,使高电流密度的有效催化成为可能.
由于其高性能和稳定性,开发的Ni-SAC对工业eCO2RR应用具有很大的前景.
这项工作为制造具有加速质量传输的高度可访问的二维半孔单原子催化剂提供了途径.

关键词:

二氧化碳的电还原.质量转移是指质量转移.半孔性半孔性尼 - 尼 - 尼 - 尼超薄的纳米薄板.

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相关概念视频

Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.