Identification of Catalytic Active Sites in Nitrogen-Doped Carbon for Electrocatalytic Dechlorination of 1,2-Dichloroethane
发布时间：2020-02-12
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- 论文类型：
- 期刊论文
- 发表时间：
- 2019-12-01
- 发表刊物：
- ACS CATALYSIS
- 收录刊物：
- SCIE
- 文献类型：
- J
- 卷号：
- 9
- 期号：
- 12
- 页面范围：
- 10931-10939
- ISSN号：
- 2155-5435
- 关键字：
- 1,2-dichloroethane; surface N-doped porous carbon; electrocatalytic dechlorination; active sites; theoretical calculations
- 摘要：
- Nitrogen (N)-doped carbon materials are considered as the most promising alternative to replace noble-metal catalysts for electrocatalytic dechlorination of 1,2-dichloroethane (DCE), which is a promising reaction for industrial production and environmental protection. Unfortunately, the vague cognition of the catalytic active sites limits its further development. Herein, a series of surface N-doped porous carbon materials with adjustable N dopants were synthesized to identify the active sites for electrocatalytic dechlorination of DCE. The as-prepared catalyst showed fascinating DCE electrocatalytic dechlorination activity and ethylene selectivity at -2.75 V (vs SCE) with a current density of 17.94 mA cm(geometry)(-2) and ethylene Faradaic efficiency of 21%. The post hydrogen treatment and X-ray photoelectron spectroscopic analysis experimentally proved that the oxidized N acts as the active site for the dechlorination of DCE to CH2CH2, which was further theoretically confirmed by first-principles calculations. This work would open avenues for the development of N-doped carbon and the production of ethylene in an efficient and environmentally benign manner.
- 第一作者
- Gan, Guoqiang
- 合写作者
- Fan, Shiying,Li, Ji,Liang, Feng,Chen, Aicheng,Li, Xinyong,Wang, Liang
- 通讯作者
- Li, XY (reprint author), Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn MOE, State Key Lab Fine Chem, Dalian 116024, Peoples R China.; Li, XY; Chen, AC (reprint author), Univ Guelph, Dept Chem, Electrochem Technol Ctr, 50 Stone Rd East, Guelph, ON N1G 2W1, Canada.