文献类型：期刊文献

中文题名：富含介孔结构的氮化碳/碳纳米管复合催化剂高效电催化还原CO_(2)为CO

英文题名：Highly efficient electrocatalytic reduction of CO_(2)to CO by nitrogen-doped carbon/carbon nanotube composite catalysts with abundant mesoporous structures

作者：刘丙泽[1];钮东方[1]

机构：[1]华东理工大学化工学院,上海200237

年份：2023

卷号：29

期号：5

起止页码：960

中文期刊名：上海大学学报(自然科学版)

外文期刊名：Journal of Shanghai University:Natural Science Edition

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD_E2023_2024】；

基金：国家自然科学面上基金资助项目(21972042)。

语种：中文

中文关键词：电还原CO_(2);CO;介孔;石墨化氮化碳;碳纳米管

外文关键词：electroreduction of CO_(2)(CO_(2)ER);CO;mesoporous;g-C3N4;carbon nano-tubes(CNTs)

摘要：氮掺杂材料中的吡啶氮被认为是电还原CO_(2)为CO的最活跃的氮催化位点.以双氰胺(dicyandiamide,DCDA)为氮源,氧化碳纳米管(carbon oxide nanotubes,CNTs-O)为分散剂,通过静电吸附-煅烧法制备了富含吡啶氮的氮化碳/碳纳米管(CN_(x)/CNTs)介孔复合催化剂.通过改变DCDA与CNTs-O的质量比,合成了具有不同石墨化氮化碳(g-C_(3)N_(4))含量的复合催化剂.通过一系列表征及电化学测试得出,当DCDA/CNTs-O质量比为0.5时,得到的CN_(0.5)/CNTs具有最优的还原CO_(2)为CO的电催化性能.在-1.0 V vs.RHE下CN_(0.5)/CNTs的CO法拉第效率(Faradaic efficiency,FE)高达94.1%,生成CO的电流密度为-13.27 mA/cm^(2),通过24 h长时间电解后依然保持着较高的法拉第效率(FECO>85%).
Pyridine nitrogen in nitrogen-doped materials is considered to be the most ac-tive nitrogen catalytic site for electroreduction of CO_(2)to CO.Dicyandiamide(DCDA)was used as nitrogen source and carbon oxide nanotubes(CNTs-O)as dispersant to prepare nitrogen-doped carbon/carbon nanotube mesoporous composite catalyst with rich pyridinic nitrogen via electrophoretic deposition-calcination method.By changing the mass ratio of DCDA and CNTs-O,the composite catalysts with different contents of g-C_(3)N_(4)were syn-thesized.Based on a series of characterization and electrochemical tests,it was determined that CN_(0.5)/CNTs catalyst prepared at DCDA/CNTs-O mass ratio of 0.5 exhibited the best electrocatalytic performance for CO_(2)reduction to CO.The Faradaic efficiency(FE)of CO on CN_(0.5)/CNTs at-1.0 V vs.RHE was as high as 94.1%,and the current density of CO generation was-13.27 mA/cm^(2).The FE of CO was still maintained at a high level(>85%)after 24-h long-term electrolysis.