Carbon Nanofibers Encapsulated Nickel‐Molybdenum Nanoparticles as Hydrogen Evolution Catalysts for Aqueous Zn−CO2 System
Abstract
Carbon capture, utilization and storage techniques have been studied extensively to reduce atmospheric carbon dioxide. However, CO2 conversion technologies are not widely proposed due to sluggish conversion rate, high energy consumption and need for precious metals as catalysts. Therefore, novel metal‐CO2 electrochemical cell has been proposed to utilize CO2 to produce electricity and H2 gas continuously. Electrochemical hydrogen evolution reaction under neutral condition has demanded the overall device performance. Herein, we have developed non‐precious NiMo‐carbon nanofiber‐based catalyst with unique matchstick‐like morphology using low temperature CVD technique and demonstrated in aqueous Zn−CO2 system. The NiMo alloy offers excellent activity by promoting hydrogen adsorption/desorption and chemically bonded carbon nanofiber assists catalytic activity by providing charge transfer. Due to superior characteristics, NiMo‐carbon nanofiber exhibits significant HER activity (over‐potential of 268 mV at 10 mA cm‐2) in CO2‐saturated 1 M KOH and superior cell performance in aqueous Zn−CO2 system (peak power density of 25 mW cm−2). In addition, the stability of the catalysts has also been investigated using chronopotentiometry and the results have compared with commercial Pt/C catalysts. We are hopeful that the present study will provide insights into developing non‐precious electrocatalysts, particularly for metal‐CO2 electrochemical conversion devices.
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The catalytic activity of BNPC-FeCo-900 (186 mV at 10 mA cm−2 and 82.46 ± 0.37 mV dec−1) compares favorably to other porous carbon electrocatalysts in alkaline medium, such as TS-NF-FO/PC5-0.25, SFCA-NiCo, and CN@Fe3Se4@C.
“the catalytic activity of BNPC-FeCo-900 (186 mV at 10 mA cm−2 and 82.46 ± 0.37 mV dec−1) demonstrates a favorable comparison to other porous carbon electrocatalysts in an alkaline medium, such as TS-NF-FO/PC5-0.25 (207.3 mV at 10 mA cm−2 and 87.6 mV dec−1),49 SFCA-NiCo (179 mV at 10 mA cm−2 and 52 mV dec−1),50 and CN@Fe3Se4@C (168 mV at 10 mA cm−2 and 77 mV dec−1)51”
From Iron–Cobalt Nanoparticles Embedded in B,N-Doped Chitosan-Derived Porous Carbon Aerogel for Overall Water Splitting (2024) · cites this paper as [51]
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“mixture solution, while the cathode counterpart uses near-neutral KHCO3 solution, and sometimes, buffer solution HCOO − is added (Asokan et al., 2020).”
BackgroundA 3D binder-free AgNWs@NiMo/PU electrode for efficient hydrogen evolution reaction
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Characterization of Carbon Nanofiber
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Liu, Y.-W., Jeong, I., Zhang, L.-J., Wang, J.-Q., Niu, B.-B., Cha, S., Xia, B.-Y., & Kim, G. (2026) · Future Molecular Science · doi:10.68642/ftms.202600001
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- Authors
- Asokan, A., Lim, C., Kim, J., Kwon, O., Lee, H., Joo, S., Jeong, H. Y., & Kim, G.
- Affiliations
- Ulsan National Institute of Science and Technology (KR)
- Corresponding author
- Kim, Guntae
- Venue
- ChemNanoMat
- Publisher
- Wiley
- Published
- 2020-04-20
- Volume
- 6
- Issue
- 6
- Pages
- 937-946
- ISSN
- 2199-692X (ISSN-L)
- OpenAlex
- W3014298717
- Cited by
- 13
- References
- 0
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 5 · 2020: 1
- FWCI
- 0.44
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ChemNanoMat (publishedVersion)
- Scholarworks@UNIST (Ulsan National Institute of Science and Technology) (submittedVersion)
- Funders
- Korea Institute of Energy Technology Evaluation and Planning
- 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 › Engineering › Electrical and Electronic Engineering › Advanced battery technologies research
- Keywords
- carbon nanofibers, hydrogen evolution reaction, electrochemical CO2 reduction, non-precious metal electrocatalysts, low-temperature chemical vapor deposition, hydrogen sorption, catalyst stability, CO2 utilization
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