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在单个原子和纳米粒子之间的协同催化,用于高度选择性的电催化CO2减少以高电流密度形成

Yuxin Chen¹, Junyoung Choi², Fangkui Liang³

¹State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology Beijing 100029 P. R. China sunzy@mail.buct.edu.cn.

Chemical science

|June 2, 2025

概括

一种新型的电催化剂,在N,S-编码的碳上采用 (In) 单个原子和纳米粒子,可以实现高效的转化二氧化碳形成,即使在高电流密度下也是如此.

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:

电催化减少二氧化碳 (CO2) 形成对于可持续的化学合成至关重要.
当前电催化剂在活动和选择性方面面临限制,特别是在高电流密度下.

研究的目的:

开发一种高活性和选择性的电催化剂,用于减少二氧化碳的形成.
为了在高电流密度下实现高效的格式生产.

主要方法:

合成双活性位点电催化剂:印 (In) 单个原子和在N,S编码的多孔碳 (In-NSC/NPs) 上支的In纳米粒子.
使用膜电极组件 (MEA) 细胞进行电化学表征.
在现场表征技术和控制实验以阐明反应机制.

主要成果:

实现了92%的格式法拉代效率 (FE),其部分电流密度为1.1 A cm-2.
在MEA电池中,在广泛的电压范围 (2.4-3 V) 上,已证明的格式FE>90%和能量转换效率>44%.
在10.5mmol cm-2h-1和2.9V的最大形式生成率;加上糖醇氧化,产率达到23.2mmol cm-2h-1.

结论:

In-NSC/NPs电催化剂有效地解决了用于格式生产的二氧化碳减排的限制.
在单个原子 (促进H2O解离) 和纳米粒子 (促进*OCHO化) 之间的协同效应是高性能的关键.
催化剂在工业相关条件下在二氧化碳电还原中显示出实际应用的希望.

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