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谷物边界和氧气空缺对电催化CO2减少增强选择性的协同效应₂

Xiaoqian Wei¹, Zijian Li², Haeseong Jang³

¹College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.

Small (Weinheim an der Bergstrasse, Germany)

|December 26, 2023

概括

双工程 SnO2 纳米板具有谷物边界和氧气空隙,可以促进二氧化碳转化为酸. 这种协同方法提高了有价值的化学品生产的催化选择性和效率.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
电化学电化学电化学

背景情况:

颗粒边界 (GB) 和氧空隙 (V_O) 对于调整材料属性至关重要.
通过对这些缺陷进行双重工程,可以提高催化性能.
有效地将二氧化碳转化为增值化学品是可持续发展的一个关键目标.

研究的目的:

开发一种新的SnO2纳米板材料,同时具有氧空缺和丰富的粒度边界 (V,G-SnO_x/C).
研究双重工程对二氧化碳电还原到酸的协同效应.
为了在酸生产中实现高选择性和效率.

主要方法:

合成的V,G-SnO_x/C纳米板.
电化学表征包括法拉第效率测量.
先进的表征技术 (例如,理论计算,光谱学).

主要成果:

在V,G-SnO_x/C表现出高的催化选择性酸 (HCOOH) 生产,最大法拉第效率 (FE) 为87%在-1.2V与RHE.
所有C1产品 (CO和HCOOH) 的FEs在应用潜力范围内超过95%.
这种双重工程材料的性能明显超过了最先进的电极和无形SnO_x/C.
理论计算和表征证实GBs增强*HCOO中间吸附和GBs/V_O降低反应障碍.

结论:

在SnO2纳米板中同时设计颗粒边界和氧气空隙是促进选择性CO2电减的有效策略.
协同效应显著增强了对酸的内在活性和选择性.
这项工作为开发高效的二氧化碳转化电催化剂提供了有希望的途径.

关键词:

二氧化碳还原反应反应二氧化碳的减少反应.电催化剂是一种电催化剂.谷物界限谷物界限谷物界限有空缺的氧气位选择性的选择性

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