氮掺杂碳限域的花状SnS催化CO_(2)电还原制甲酸  

Nitrogen-doped carbon-confined flower-like SnS catalyst for electrochemical reduction of CO_(2) to HCOOH

作　　者：黄鑫[1] 刘成[2] 唐如佳 韩欣欣 陈世霞 王珺[1] HUANG Xin;LIU Cheng;TANG Rujia;HAN Xinxin;CHEN Shixia;WANG Jun(School of Chemistry and Chemical Engineering,Nanchang University,Nanchang 330031,Jiangxi,China;School of Future Technology,Nanchang University,Nanchang 330031,Jiangxi,China;School of Resources&Environment,Nanchang University,Nanchang 330031,Jiangxi,China)

机构地区：[1]南昌大学化学化工学院,江西南昌330031 [2]南昌大学未来技术学院,江西南昌330031 [3]南昌大学资源与环境学院,江西南昌330031

出　　处：《化工进展》2022年第11期5887-5895,共9页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(22008101);江西省自然科学基金(20212BAB213038);江西省研究生创新基金(YC2021-S045)。

摘　　要：合理设计高效的电催化剂是二氧化碳电化学还原(CO_(2)ER)为高附加值化学品和燃料的关键。本文利用水热-煅烧法制备了氮掺杂碳限域的花状SnS催化剂(SnS@NC)并研究了其电催化CO_(2)的特性。基于超薄氮掺杂碳层的限域效应,SnS的层厚由原始的30nm缩减至20nm,电化学活性面积明显增强,同时氮掺杂碳层增强了对CO_(2)的吸附和活化。SnS@NC催化CO_(2)转化为甲酸的能力明显增强,在-1.3V (vs. RHE)的H型电解池中法拉第效率为81.2%,电流密度为29.5mA/cm^(2),本文为金属硫化物复合催化剂功能化提供了新策略。Rational design of efficient electrocatalysts is critical for electrochemical reduction of carbon dioxide(CO_(2)ER) to high value-added chemicals and fuels. Herein, a hydrothermal-calcination method was developed to prepare flower-like SnS catalyst confined by nitrogen-doped carbon(SnS@NC) and the CO_(2)ER performance of SnS@NC was studied. Based on the confinement effect of the ultra-thin nitrogendoped carbon layer, the layer thickness of SnS nanosheet was reduced from the original 30nm to 20nm,and the electrochemically active area was significantly increased. At the same time, the nitrogen-doped carbon layer could enhance the adsorption and activation of CO_(2). As a result, the CO_(2)-to-HCO_(2)OH conversion over SnS@NC was significantly enhanced. The SnS@NC provided an HCO_(2)OH Faraday efficiency of 81.2% at-1.3V(vs. RHE), and a current density up to 29.5mA/cm^(2) in the H-type electrolytic cell. This work could provide a novel strategy for the functionalization of metal-sulfide based catalysts.

关 键 词：电化学 还原 二氧化碳 硫化锡 氮掺杂碳 

分 类 号：O643.3[理学—物理化学] O646[理学—化学]