Indexed by:
Journal Papers
First Author:
Qin, Meichun
Correspondence Author:
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.
Co-author:
Fan, Shiying,Wang, Liang,Gan, Guoqiang,Wang, Xinyang,Cheng, Jie,Hao, Zhengping,Li, Xinyong
Date of Publication:
2020-03-07
Journal:
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Included Journals:
PubMed、EI、SCIE
Document Type:
J
Volume:
562
Page Number:
540-549
ISSN No.:
0021-9797
Key Words:
N/O co-doped; Ordered mesoporous carbon; Two-electron ORR;
Electrocatalyst; Adsorption energy
Abstract:
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.
Translation or Not:
no
