Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 52, Pages 17135-17140Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201811061
Keywords
electrocatalysts; N-rich carbon nitrides; oxygen reduction reaction; porous materials; triazoles
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Funding
- program of the Discovery Early Career Researcher Award (DECRA) of the Australian Research Council (ARC) [DE170101069]
- Australian Research Council [DE170101069] Funding Source: Australian Research Council
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Mesoporous carbon nitrides (MCN) with C3N4 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 C3N5 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 C3N5 consists of 1 triazole and 2 triazine moieties. The triazole-based mesoporous C3N5 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-C3N4.
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