Cobalt‐Embedded Nitrogen‐Rich Carbon Nanotubes Efficiently Catalyze Hydrogen Evolution Reaction at All pH Values
Abstract
Despite being technically possible, splitting water to generate hydrogen is still practically unfeasible due mainly to the lack of sustainable and efficient catalysts for the half reactions involved. Herein we report the synthesis of cobalt-embedded nitrogen-rich carbon nanotubes (NRCNTs) that 1) can efficiently electrocatalyze the hydrogen evolution reaction (HER) with activities close to that of Pt and 2) function well under acidic, neutral or basic media alike, allowing them to be coupled with the best available oxygen-evolving catalysts-which also play crucial roles in the overall water-splitting reaction. The materials are synthesized by a simple, easily scalable synthetic route involving thermal treatment of Co(2+) -embedded graphitic carbon nitride derived from inexpensive starting materials (dicyandiamide and CoCl2 ). The materials' efficient catalytic activity is mainly attributed to their nitrogen dopants and concomitant structural defects.
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The overpotential of 113 mV versus RHE for CoP-400 in 0.5 M H2SO4 is lower than that of many reported Co-based electrocatalysts.
“the value (113 mV vs RHE) is lower than that of many reported Co-based electrocatalysts in 0.5 m H2SO4”
From Sub‐1.5 nm Ultrathin CoP Nanosheet Aerogel: Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH Values (2018) · cites this paper as [40]
Metal Co nanoparticles encased by few carbon layers are a potential catalyst with superior activity and excellent stability, because the encapsulating carbon layers protect the inner Co nanoparticles from corrosion and oxidation under harsh environment.
“Among them, metal Co nanoparticles encased by few carbon layers are emerged as a potential catalyst with superior activity coupled with excellent stability (e.g. Co@BCN,[14] U-CNT-900,[15] Co-NRCNTs[16] and Co@N-C[17]), ascribed to the encapsulating carbon layers serving as a protector, therefore, hampering the inner Co nanoparticles from corrosion and oxidization under harsh environment.”
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- Authors
- Zou, X., Huang, X., Goswami, A., Silva, R., Sathe, B. R., Mikmeková, E., & Asefa, T.
- Affiliations
- Rutgers, The State University of New Jersey (US)
- Czech Academy of Sciences, Institute of Scientific Instruments (CZ)
- Corresponding author
- Asefa, Tewodros
- ORCID
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2014-03-20
- Volume
- 53
- Issue
- 17
- Pages
- 4372-4376
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W2129204757
- Cited by
- 979
- References
- 8
- Citations by year
- 2026: 11 · 2025: 17 · 2024: 30 · 2023: 35 · 2022: 53 · 2021: 90 · 2020: 111 · 2019: 158 · 2018: 148 · 2017: 103 · 2016: 113 · 2015: 90 · 2014: 20
- FWCI
- 35.85
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Angewandte Chemie International Edition (publishedVersion)
- PubMed (publishedVersion)
- Rutgers University Community Repository (Rutgers University) (submittedVersion)
- ASEP (submittedVersion, public-domain)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
- Keywords
- hydrogen evolution reaction, electrocatalysis, water splitting, graphitic carbon nitride, nitrogen doping, structural defects, dicyandiamide, cobalt chloride, heat treatment
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