Nanocomposites Based on Ruthenium Nanoparticles Supported on Cobalt and Nitrogen-Codoped Graphene Nanosheets as Bifunctional Catalysts for Electrochemical Water Splitting
Abstract
Rational design and engineering of high-efficiency electrocatalysts toward overall water splitting is crucial for the development of hydrogen energy technology. Herein, a facile procedure is described for the preparation of effective bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), where ruthenium nanoparticles are supported on graphene nanosheets that are codoped with atomic cobalt and nitrogen by controlled pyrolysis of melamine-functionalized graphene oxide and metal ion precursors. The obtained nanocomposites (CoNG/Ru) exhibit a remarkable electrocatalytic activity toward both HER and OER in alkaline media, with a respective overpotential of only -15 and +350 mV to reach the current density of 10 mA cm -2 , which is much better than the monometallic counterparts and relevant catalysts in the literature. With CoNG/Ru as bifunctional catalysts for overall water splitting in a two-electrode system, a low potential of 1.58 V is needed to reach the current density of 10 mA cm -2 , which is even better than that with commercial Pt/C and RuO 2 catalysts. This is ascribed to the synergistic interactions between the metal species by metal-metal charge transfer. These results highlight the significance of exploiting the electronic interactions between metal species in carbon-based nanocomposites to develop bifunctional catalysts for electrochemical energy technologies.
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Ruthenium has emerged as an attractive candidate for HER largely because of a moderate Ru-H bond strength analogous to Pt-H, which is conducive to facile HER kinetics.
“ruthenium (Ru) has emerged as an attractive candidate, largely because of a moderate strength of the ruthenium-hydrogen (Ru-H) bond that is analogous to that of Pt-H, which is conducive to facile HER kinetics [9–18]”
From Atomically dispersed ruthenium in carbon aerogels as effective catalysts for pH-universal hydrogen evolution reaction (2022) · cites this paper as [9]
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Sustainable synthesis of supported metal nanocatalysts for electrochemical hydrogen evolution
Chen, Q., Nie, Y., Ming, M., Fan, G., Zhang, Y., & Hu, J.-S. (2020) · Chinese Journal of Catalysis · doi:10.1016/s1872-2067(20)63652-x · Cited by 88 · see citing works
Self-citationHe, T., Song, Y., Chen, Y., Song, X., Lu, B., Liu, Q., Liu, H., Zhang, Y., Ouyang, X., & Chen, S. (2022) · Chemical Engineering Journal · doi:10.1016/j.cej.2022.136337 · Cited by 66 · see citing works
Self-citation
- Authors
- He, T., Peng, Y., Li, Q., Lu, J. E., Liu, Q., Mercado, R., Chen, Y., Nichols, F., Zhang, Y., & Chen, S.
- Affiliations
- Central South University (CN)
- University of California, Santa Cruz (US)
- Corresponding author
- Zhang, Yi
- Chen, Shaowei
- ORCID
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-11-22
- Volume
- 11
- Issue
- 50
- Pages
- 46912-46919
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2990066980
- Cited by
- 58
- References
- 0
- Citations by year
- 2026: 7 · 2025: 6 · 2024: 8 · 2023: 7 · 2022: 15 · 2021: 8 · 2020: 7
- FWCI
- 1.60
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- ACS Applied Materials & Interfaces (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Division of Chemistry (CHE-1900235, CHE-1710408)
- China Scholarship Council (201806370027)
- National Natural Science Foundation of China (21972169, 21473257, 21773311)
- Hunan Province (2017TP1001)
- 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
- ruthenium nanoparticles, graphene nanosheets, bifunctional electrocatalysts, overall water splitting, hydrogen evolution reaction, oxygen evolution reaction, metal-to-metal charge transfer, pyrolysis, alkaline electrocatalysis, hydrogen production
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