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One‐Step Synthesis of Nb2O5/C/Nb2C (MXene) Composites and Their Use as Photocatalysts for Hydrogen Evolution
Open accessAbstract
Hydrogen production through facile photocatalytic water splitting is regarded as a promising strategy to solve global energy problems. Transition‐metal carbides (MXenes) have recently drawn attention as potential co‐catalyst candidates for photocatalysts. Here, we report niobium pentoxide/carbon/niobium carbide (MXene) hybrid materials (Nb 2 O 5/C/Nb 2 C) as photocatalysts for hydrogen evolution from water splitting. The Nb 2 O 5/C/Nb 2 C composites were synthesized by one‐step CO 2 oxidation of Nb 2 CTx. Nb 2 O 5 grew homogeneously on Nb 2 C after mild oxidation, during which some amorphous carbon was also formed. With an optimized oxidation time of 1.0 h, Nb 2 O 5/C/Nb 2 C showed the highest hydrogen generation rate (7.81 μmol h−1 g cat−1), a value that was four times higher than that of pure Nb 2 O 5. The enhanced performance of Nb 2 O 5/C/Nb 2 C was attributed to intimate contact between Nb 2 O 5 and conductive Nb 2 C and the separation of photogenerated charge carriers at the Nb 2 O 5/Nb 2 C interface; the results presented herein show that transition‐metal carbide are promising co‐catalysts for photocatalytic hydrogen production.
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Metadata
- Authors
- Su, T., Peng, R., Hood, Z. D., Naguib, M., Ivanov, I. N., Keum, J. K., Qin, Z., Guo, Z., & Wu, Z.
- Venue
- ChemSusChem
- Publisher
- Wiley
- Published
- 2018-01-29
- Volume
- 11
- Issue
- 4
- Pages
- 688-699
- ISSN
- 1864-5631 (ISSN-L)
- 1864-564X
- OpenAlex
- W2776938484
- Cited by
- 426
- References
- 51
- FWCI
- 8.11
- Type
- journal article
- Language
- en
- Open access
- green
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