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二维共价有机框架的级联金属化,以促进电化学CO减排

Qianfeng Gu¹, Yinger Xin², Mingzi Sun³

¹Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue 83, Kowloon, Hong Kong SAR, 999077, P.R. China.

Angewandte Chemie (International ed. in English)

|March 25, 2025

概括

以和为基础的COF的级联金属化增强了电化学CO的降解到甲醇. 这一策略优化了催化剂以实现高效的甲醇生产,克服了巨大的超潜力挑战.

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:

对甲醇的电化学CO降解反应 (CORR) 面临着由于巨大的过度潜力的挑战.
精确修改电催化剂,同时保持活动部位对齐至关重要,但很困难.

研究的目的:

开发基于酸的共价有机框架 (COFs) 的级联化策略,用于选择性将CO降低到甲醇.
研究双金属位点 (Co和Ni) 对催化性能的协同效应.

主要方法:

合成的基于甲酸的COF与级联化 (Co和Ni).
评估电催化性能,使用周期电压测量和时电压测量等技术.
使用在位减弱总反射率表面增强红外吸收光谱学 (ATR-SEIRAS) 描述了催化剂的特性.
进行理论计算以了解反应机制和电子结构.

主要成果:

Ni-Co级联金属化COF (CityU-35) 在 -0.85V与RHE相比,在甲醇生产中实现了48.4%的法拉第克效率.
这显著超过了Co-only催化剂 (CityU-34) 的2.1% FE.
性能提升归因于优化的电子结构,改善的*CO吸附和加速的质子化.

结论:

级联化是一种有效的策略,用于定制二维COF的催化活性.
在COF中,CO和Ni位点之间的协同效应减少了减少CO的能源障碍.
这项工作扩展了用于先进电催化剂的网状框架的功能设计.

关键词:

电化学的CO减排方法金属化共价有机框架.甲醇生产甲醇生产

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