Controlling the Morphology and Efficiency of Nanostructured Molybdenum Nitride Electrocatalysts for the Hydrogen Evolution Reaction
Abstract
Among catalysts based on non‐noble metals, Mo‐based materials are important for hydrogen evolution because of their low cost, good conductivity, and catalytic efficiency. This study demonstrates a facile two‐step synthesis of Mo2N nanostructures assembled from 5–8 nm particles with graphitic carbon nitride as the nitrogen source. These Mo2N nanostructures of various morphologies (hexagons, triangles, and nanowires) show a very high activity and stability in acidic media during water electrolysis. Their nanostructures were characterized by using powder XRD, electron microscopy, N2 gas adsorption analysis, and X‐ray photoelectron spectroscopy. Hydrogen evolution reaction parameters, which include the Tafel slope, charge transfer resistance, and stability, were analyzed by using linear sweep voltammetry and electrochemical impedance spectroscopy. Thin hexagonal sheets of Mo2N show the highest apparent electrocatalytic activity (current density of 197 mA cm−2geometric at −400 mV vs. the reversible hydrogen electrode) and excellent stability in an acidic medium with a small onset potential of 90 mV and a Tafel slope of 145 mV decade−1. The lowest Tafel slope was observed for Mo2N nanowires.
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Single-metal nitrides have not been reported to be bifunctional.
“However, single-metal nitrides have not been reported to be bifunctional.”
From Electronic Structure Tuning in Ni<sub>3</sub>FeN/r-GO Aerogel toward Bifunctional Electrocatalyst for Overall Water Splitting (2018) · cites this paper as [20]
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Cao, B., Veith, G. M., Neuefeind, J. C., Adzic, R. R., & Khalifah, P. G. (2013) · Journal of the American Chemical Society · doi:10.1021/ja4081056 · Cited by 998 · see citing works
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Chen, Z., Song, Y., Cai, J., Zheng, X., Han, D., Wu, Y., Zang, Y., Niu, S., Liu, Y., Zhu, J., et al. (2018) · Angewandte Chemie International Edition · doi:10.1002/anie.201801834 · Cited by 1,075 · see citing works
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Jiang, Z., Ren, J., Li, Y., Zhang, X., Zhang, P., Huang, J., Du, C., & Chen, J. (2019) · Dalton Transactions · doi:10.1039/c9dt01118h · Cited by 38 · see citing works
- Authors
- Ojha, K., Saha, S., Kumar, B., Hazra, K. S., & Ganguli, A. K.
- Affiliations
- Indian Institute of Technology Delhi (IN)
- Institute of Nano Science and Technology (IN)
- Corresponding author
- Ganguli, Ashok K.
- Venue
- ChemCatChem
- Publisher
- Wiley
- Published
- 2016-02-18
- Volume
- 8
- Issue
- 6
- Pages
- 1218-1225
- ISSN
- 1867-3880 (ISSN-L)
- 1867-3899
- OpenAlex
- W2283941186
- Cited by
- 81
- References
- 2
- Citations by year
- 2026: 1 · 2025: 7 · 2024: 5 · 2023: 6 · 2022: 8 · 2021: 8 · 2020: 12 · 2019: 7 · 2018: 16 · 2017: 9 · 2016: 2
- FWCI
- 3.07
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ChemCatChem (publishedVersion)
- Funders
- Department of Science & Technology
- DST
- Department of Electronics and Information Technology
- CSIR, Govt. of India
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Materials Chemistry › Hydrogen Storage and Materials
- Physical Sciences › Chemical Engineering › Catalysis › Ammonia Synthesis and Nitrogen Reduction
- Keywords
- molybdenum nitride, hydrogen evolution reaction, electrocatalysts, graphitic carbon nitride, nitrogen source, two-step synthesis, nanowires, morphology control, acidic water electrolysis, Tafel slope, charge transfer resistance, catalyst stability, non-noble metal catalysts
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