Sub-5 nm SnO2 chemically coupled hollow carbon spheres for efficient electrocatalytic CO2 reduction
Sub-5 nm SnO2 chemically coupled hollow carbon spheres for efficient electrocatalytic CO2 reduction
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亚 5 nm SnO2 化学耦合空心碳球可有效电催化 CO2 还原
DOI：
10.1039/c8ta08058e
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发表时间：
2018
影响因子：
11.9
通讯作者：
Zheng Gengfeng
中科院分区：
文献类型：
--
作者：
Yiliguma;Wang Zhijie;Yang Chao;Guan Anxiang;Shang Longmei;Al-Enizi Abdullah M.;Zhang Lijuan;Zheng Gengfeng
电化学CO2还原反应（CO2 RR）是一种将不断积累的CO2排放转化为燃料或增值化学品的可持续方法。锡及其化合物被认为是甲酸选择性CO2 RR催化剂，其催化活性和稳定性显著依赖于催化剂的微/纳米结构和相应的电子结构。在此，我们开发了一种亚5 nm的SnO 2纳米颗粒修饰的空心碳球结构（SnO 2/C）作为一种有效的CO2 RR电催化剂。与普通SnOx纳米颗粒聚集的空心球和空心碳球相比，SnO 2/C实现了更高的CO2 RR催化性能，包括更好的法拉第效率（FE）和增强的电化学稳定性。SnO 2/C催化剂的CO2 RR活性和稳定性的显著提高归因于SnO 2与碳球之间的Sn-O-C键，这导致了CO2化学吸附的增加、电子转移的快速和催化活性中心的增加。
The electrochemical CO2 reduction reaction (CO2RR) represents a sustainable approach to convert the continuously accumulating CO2 emission into fuels or value-added chemicals. Tin and its compounds are recognized as formate selective CO2RR catalysts, while their catalytic activities and stabilities significantly depend on the micro/nanostructures and the corresponding electronic structures of the catalysts. Herein, we developed a sub-5 nm SnO2 nanoparticle-decorated hollow carbon spherical structure (SnO2/C) as an efficient CO2RR electrocatalyst. Compared to the plain SnOx nanoparticle-aggregated hollow spheres and hollow carbon spheres, SnO2/C achieved a much enhanced CO2RR catalytic performance, including better faradaic efficiencies (FE) and enhanced electrochemical stability. The much improved CO2RR activity and stability of SnO2/C were attributed to the Sn–O–C linkages between SnO2 and the carbon sphere, which led to the increased CO2 chemisorption, fast electron transfer, and the increased number of catalytically active sites.