Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 31, Pages 26001-26007Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b06305
Keywords
Ni1.85Fe0.15P nanosheet arrays; electrocatalysts; hydrogen evolution reaction; oxygen evolution reaction; water splitting
Funding
- National Natural Science Foundation of China [51372186, 51672204]
- Fundamental Research Funds for the Central Universities [2016-YB-001]
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Exploring efficient and earth-abundant electrocatalysts for water splitting is crucial for various renewable energy technologies. In this work, iron (Fe)-doped nickel phosphide (Ni2P) nanosheet arrays supported on nickel foam (Ni1.85Fe0.15P NSAs/NF) are fabricated through a facile hydrothermal method, followed by phosphorization. The electrochemical analysis demonstrates that the Ni1.85Fe0.15P NSAs/NF electrode possesses high electrocatalytic activity for water splitting. In 1.0 M KOH, the Ni1.85Fe0.15P NSAs/NF electrode only needs overpotentials of 106 mV at 10 mA cm(-2) and 270 mV at 20 mA cm(-2) to drive the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Furthermore, the assembled two-electrode (Ni1.85Fe0.15P NSAs/NF||Ni1.85Fe0.15P NSAs/NF) alkaline water electrolyzer can produce a current density of 10 mA cm at 1.61 V. Remarkably, it can maintain stable electrolysis over 20 h. Thus, this work undoubtedly offers a promising electrocatalyst for water splitting.
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