Regulable pyrrolic-N-doped carbon materials as an efficient electrocatalyst for selective O2 reduction to H2O2

As a successful alternative to the complex and dangerous anthraquinone process, a simple and safe method for the efficient preparation of hydrogen peroxide is to use the electrochemical two-electron oxygen reduction reaction (2e− ORR) process. Herein, we report a facile approach to achieving metal-f...

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Bibliographic Details
Published in:New journal of chemistry 2022-08, Vol.46 (30), p.14510-14516
Main Authors: Zhang, Yunxian, Pang, Yongyu, Xia, Dong, Chai, Guoliang
Format: Article
Language:English
Subjects:
Anthraquinones
Carbon
Catalysts
Chemical reduction
Electrocatalysts
Hydrogen peroxide
Nitrogen
Oxygen reduction reactions
Photoelectrons
Raw materials
Selectivity
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Summary:As a successful alternative to the complex and dangerous anthraquinone process, a simple and safe method for the efficient preparation of hydrogen peroxide is to use the electrochemical two-electron oxygen reduction reaction (2e− ORR) process. Herein, we report a facile approach to achieving metal-free nitrogen-doped carbon material electrocatalysts (N-CMCs) using cheap and easily available raw materials, which also have an excellent electrochemical 2e− ORR catalytic performance and selectivity for hydrogen peroxide (H2O2). The as-fabricated nitrogen-doped carbon material electrocatalysts (named as N-CMC-1 : 5) deliver the high H2O2 selectivity of over 80% in a wide potential range from 0.30 to 0.70 V vs. RHE, where the highest H2O2 selectivity can reach 81.4% at 0.42 V vs. RHE. X-ray photoelectron spectroscopy and electrochemical analyses reveal that the content of pyrrolic-N in the catalysts has a positive effect on the 2e− ORR activity. When the catalyst contains more pyrrolic-N, the catalyst demonstrates a better 2e− ORR performance and H2O2 selectivity in alkaline medium, as well as the long-term stability of the catalyst.
ISSN:1144-0546
1369-9261
DOI:10.1039/d2nj02393h