Mechanistic Insights on Ternary Ni2−xCoxP for Hydrogen Evolution and Their Hybrids with Graphene as Highly Efficient and Robust Catalysts for Overall Water Splitting
Abstract
Searching the high‐efficient, stable, and earth‐abundant electrocatalysts to replace the precious noble metals holds the promise for practical utilizations of hydrogen and oxygen evolution reactions (HER and OER). Here, a series of highly active and robust Co‐doped nickel phosphides (Ni2−xCoxP) catalysts and their hybrids with reduced graphene oxide (rGO) are developed as bifunctional catalysts for both HER and OER. The Co‐doping in Ni2P and their hybridization with rGO effectively regulate the catalytic activity of the surface active sites, accelerate the charge transfer, and boost their superior catalytic activity. Density functional theory calculations show that the Co‐doped catalysts deliver the moderate trapping of atomic hydrogen and facile desorption of the generated H2 due to the H‐poisoned surface active sites of Ni2−xCoxP under the real catalytic process. Electrochemical measurements reveal the high HER efficiency and durability of the NiCoP/rGO hybrids in electrolytes with pH 0–14. Coupled with the remarkable and robust OER activity of the NiCoP/rGO hybrids, the practical utilization of the NiCoP/rGO‖NiCoP/rGO for overall water splitting yields a catalytic current density of 10 mA cm−2 at 1.59 V over 75 h without an obvious degradation and Faradic efficiency of ≈100% in a two‐electrode configuration and 1.0 m KOH.
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NCSe@MGA has better HER performance than recently published NiCo-based structures such as NiCoSe2/C, CuNiCoSe N-C/n-box, NiCoP/rGO, NiCo Alloy/rGO, and O-Ni0.5W0.5Se2.
“Examination of these parameters proves better HER performance of NCSe@MGA.”
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- Authors
- Li, J., Yan, M., Zhou, X., Huang, Z., Xia, Z., Chang, C., Ma, Y., & Qu, Y.
- Affiliations
- Xi'an Jiaotong University (CN)
- Corresponding author
- Chang, Chun‐Ran
- Ma, Yuanyuan
- Qu, Yongquan
- Venue
- Advanced Functional Materials
- Publisher
- Wiley
- Published
- 2016-08-02
- Volume
- 26
- Issue
- 37
- Pages
- 6785-6796
- ISSN
- 1616-301X (ISSN-L)
- 1616-3028
- OpenAlex
- W2490669091
- Cited by
- 556
- References
- 12
- Citations by year
- 2026: 7 · 2025: 28 · 2024: 25 · 2023: 33 · 2022: 50 · 2021: 55 · 2020: 88 · 2019: 109 · 2018: 87 · 2017: 69 · 2016: 5
- FWCI
- 24.44
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Advanced Functional Materials (publishedVersion)
- Funders
- National Natural Science Foundation of China (21401148, 21201138, 21543005)
- 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
- nickel phosphide, reduced graphene oxide, bifunctional electrocatalysts, hydrogen evolution reaction, oxygen evolution reaction, overall water splitting, charge transfer, noble-metal-free electrocatalysts, catalyst stability
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