Ordered Mesoporous C 3 N 5 with a Combined Triazole and Triazine Framework and Its Graphene Hybrids for the Oxygen Reduction Reaction (ORR)

Mesoporous carbon nitrides (MCN) with C N stoichiometry could find applications in fields ranging from catalysis, sensing, and adsorption-separation to biotechnology. The extension of the synthesis of MCN with different nitrogen contents and chemical structures promises access to a wider range of ap...

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Published inAngewandte Chemie International Edition Vol. 57; no. 52; pp. 17135 - 17140
Main Authors Kim, In Young, Kim, Sungho, Jin, Xiaoyan, Premkumar, Selvarajan, Chandra, Goutam, Lee, Nam-Suk, Mane, Gurudas P, Hwang, Seong-Ju, Umapathy, Siva, Vinu, Ajayan
Format Journal Article
LanguageEnglish
Published Germany 21.12.2018
Subjects
triazoles
electrocatalysts
porous materials
N-rich carbon nitrides
oxygen reduction reaction
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Summary:Mesoporous carbon nitrides (MCN) with C N stoichiometry could find applications in fields ranging from catalysis, sensing, and adsorption-separation to biotechnology. The extension of the synthesis of MCN with different nitrogen contents and chemical structures promises access to a wider range of applications. Herein we prepare mesoporous C N with a combined triazole and triazine framework via a simple self-assembly of 5-amino-1H-tetrazole (5-ATTZ). We are able to hybridize these nanostructures with graphene by using graphene-mesoporous-silica hybrids as a template to tune the electronic properties. DFT calculations and spectroscopic analyses clearly demonstrate that the C N consists of 1 triazole and 2 triazine moieties. The triazole-based mesoporous C N and its graphene hybrids are found to be highly active for oxygen reduction reaction (ORR) with a higher diffusion-limiting current density and a decreased overpotential than those of bulk g-C N .
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201811061