Oxygen and nitrogen co-doped ordered mesoporous carbon materials enhanced the electrochemical selectivity of O-2 reduction to H2O2
发布时间：2020-03-02
点击次数：
- 论文类型：
- 期刊论文
- 发表时间：
- 2020-03-07
- 发表刊物：
- JOURNAL OF COLLOID AND INTERFACE SCIENCE
- 收录刊物：
- SCIE、EI、PubMed
- 文献类型：
- J
- 卷号：
- 562
- 页面范围：
- 540-549
- ISSN号：
- 0021-9797
- 关键字：
- N/O co-doped; Ordered mesoporous carbon; Two-electron ORR; Electrocatalyst; Adsorption energy
- 摘要：
- Electrochemical hydrogen peroxide production from two-electron oxygen reduction reaction, a cost-effective, sustainable and reliable method compared with the traditional anthraquinone process, is attracting growing attention. However, it is challenged by the selectivity of electrocatalysts. In this context, nitrogen and oxygen co-doped ordered mesoporous carbon materials have been successfully fabricated. Benefiting from the ordered pore structure, better dispersion behavior and valid doping effect, a high selectivity (similar to 95.00%), good activity and stability toward H2O2 production were achieved. Systematic characterizations like physical adsorption, zeta potential, X-ray photoelectron spectroscopy and density functional theory (DFT) calculation revealed that interactive effects between pyridinic N and functional groups of COOH/C-O-C largely facilitated the desorption of intermediates (*OOH, * represents an unoccupied active site) in turn enhance the selectivity of electrocatalysts toward H2O2 production. Interestingly, H2O2 produced in situ was applied to Electro-Fenton, the formaldehyde mineralization rate was high to about 88.06%. These findings offer a rational chemical design of electrocatalysts toward H2O2 production and pollutant purification. (C) 2019 Elsevier Inc. All rights reserved.
- 第一作者
- Qin, Meichun
- 合写作者
- Hao, Zhengping,Li, Xinyong,Wang, Liang,Gan, Guoqiang,Wang, Xinyang,Cheng, Jie,Fan, Shiying
- 通讯作者
- Li, XY (reprint author), Dalian Univ Technol, Sch Environm Sci & Technol, State Key Lab Fine Chem, Key Lab Ind Ecol & Environm Engn MOE, Dalian 116024, Peoples R China.; Li, XY (reprint author), Curtin Univ, Dept Chem Engn, GPO Box U1987, Perth, WA 6845, Australia.