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Multilayered Zn nanosheets as an electrocatalyst for efficient electrochemical reduction of CO2
Journal of Catalysis ( IF 6.5 ) Pub Date : 2017-11-24 , DOI: 10.1016/j.jcat.2017.11.003
Taotao Zhang , Xianfeng Li , Yanling Qiu , Panpan Su , Wenbin Xu , Hexiang Zhong , Huamin Zhang

Electrochemical reduction of CO2 into useful fuels, when powered by renewable energy, is an ideal process for replacing fossil feedstocks and simultaneously decreasing CO2 emission. Developing inexpensive electrocatalysts for CO2 reduction to CO with high activity and selectivity is an important part of CO2 conversion. Zn as a low-cost metal is identified to be a promising electrocatalyst for CO2 conversion. Here, we report a Zn electrode composed of multilayered Zn nanosheets (MZnNSs) with high density of edge sites. The MZnNSs catalyst exhibited a maximal CO Faradaic efficiency about 86% at −1.13 V vs RHE, which is almost 9 times higher than that of bulk Zn foil. Density functional theory (DFT) calculations suggest that the improvement of the activity and selectivity of MZnNSs for CO2 reduction is attributed to its high density of edge sites.



中文翻译:

多层锌纳米片作为有效催化电化学还原CO 2的电催化剂

当使用可再生能源驱动时,将CO 2电化学还原成有用的燃料,是替代化石原料并同时减少CO 2排放的理想方法。开发廉价的具有高活性和选择性的用于将CO 2还原为CO的电催化剂是CO 2转化的重要组成部分。锌被认为是低成本的金属,有望成为CO 2的有希望的电催化剂转换。在这里,我们报告的锌电极由具有高边缘位置密度的多层锌纳米片(MZnNSs)组成。MZnNSs催化剂在-1.13 V时相对于RHE表现出最大的CO法拉第效率,约为RHE的约86%,比散装锌箔的法拉第效率高将近9倍。密度泛函理论(DFT)计算表明,MZnNSs降低CO 2的活性和选择性的提高归因于其边缘位点的高密度。

更新日期:2017-11-24
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