Engineering Electronic Structure of Stannous Sulfide by Amino‐Functionalized Carbon: Toward Efficient Electrocatalytic Reduction of CO2 to Formate,Advanced Energy Materials

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Engineering Electronic Structure of Stannous Sulfide by Amino‐Functionalized Carbon: Toward Efficient Electrocatalytic Reduction of CO2 to Formate
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-01-29 , DOI: 10.1002/aenm.201903664
Zhipeng Chen ₁ , Xinxin Zhang _{1,

2} , Mingyang Jiao ₁ , Kaiwen Mou _{1,

2} , Xiangping Zhang ₃ , Licheng Liu ₁

Affiliation

Engineering electronic structure to enhance the binding energies of reaction intermediates in order to achieve a high partial current density can lead to increased yield of target products. Herein, amino‐functionalized carbon is used to regulate the electronic structure of tin‐based catalysts to enhance activity of CO₂ electroreduction. The hollow nanotubes composed of SnS (stannous sulfide) nanosheets are modified with amino‐functionalized carbon layers, achieving a highest formate Faraday efficiency of 92.6% and a remarkable formate partial current density of 41.1 mA cm⁻² (a total current density of 52.1 mA cm⁻²) at a moderate overpotential of 0.9 V versus reversible hydrogen electrode, as well as a good stability. Density functional theory calculations demonstrate that the superior activity is attributed to the synergistic effect among SnS and Aminated‐C in increasing the adsorption energies of the key intermediates and accelerating the charge transfer rate.

中文翻译：

氨基官能化碳对硫化亚锡的工程电子结构：高效电催化还原CO2生成甲酸酯

工程电子结构增强反应中间体的结合能以实现高的部分电流密度可导致目标产物产率的提高。在此，氨基官能化碳用于调节锡基催化剂的电子结构，以增强CO ₂电还原活性。由SnS（硫化亚锡）纳米片组成的中空纳米管经氨基官能化的碳层改性，实现了最高的法拉第甲酸法拉第效率为92.6％和显着的甲酸分流密度为41.1 mA cm ^-2（总电流密度为52.1 mA厘米^-2）相对于可逆氢电极在0.9 V的中等过电势下具有良好的稳定性。密度泛函理论计算表明，较高的活性归因于SnS和Aminated-C在增加关键中间体的吸附能和加快电荷转移速率方面的协同作用。

更新日期：2020-02-25

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