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选择性CO₂电还原到C₂₊产品的*CO吸附的半结构特异配置

Zaiqi Li¹, Bin Sun¹, Difei Xiao¹

¹State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, 250100, Jinan, China.

Angewandte Chemie (International ed. in English)

|September 2, 2024

概括

工程化半孔铜氧化物 (CuO) 电催化剂从二氧化碳减排中选择性地产生多碳 (C2+) 醇. 中体结构的设计控制了CO吸附,有利于C2+醇而不是乙烯气体.

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:

多碳 (C2+) 醇是通过电化学二氧化碳减排产生的重要液体能量载体.
对于C2+酒精的低选择性通常是由联合生产的乙烯气体 (C2H4) 引起的.

研究的目的:

为选择性C2+产品分配设计半结构氧化铜 (CuO) 电催化剂.
了解中体结构如何影响CO吸附和随后的C-C合反应.

主要方法:

半孔CuO (m-CuO) 和圆柱式CuO (c-CuO) 电催化剂的制造.
在现场光谱分析CO中间吸附配置.
计算计算以阐明反应路径.

主要成果:

无论m-CuO还是c-CuO都实现了高的总C2+产品选择性 (≥76%).
m-CuO主要产生了C2+酒精 (55%),而c-CuO则偏好了C2H4 (52%).
观察到介质结构诱导的疏水性和量身定制的*CO吸附 (在m-CuO上桥梁,在c-CuO上顶部).

结论:

CuO的合理的中层结构设计使选择性C2+产品分布成为可能.
对*CO吸附配置的控制是针对C2+酒精或C2H4.4的关键.
这项工作为设计针对特定产品的高效电催化剂提供了新的策略.

关键词:

*CO吸附配置配置 *CO吸附配置二氧化碳的电还原 CO2 的电还原.在CuO中位结构中,CuO中位结构是CuO中位结构.这是一个C-C合器.多碳产品是多碳产品.

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