کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6471197 | 1424115 | 2017 | 8 صفحه PDF | دانلود رایگان |
- Fe/Ni Phosphides grow on Ni foam by Partial-sacrificial-template method.
- FeNiPx exhibits extraordinarily high activities for both OER and HER.
- 400Â h well-maintained galvanostatic electrolysis.
Electrochemical water splitting is considered to be one of the most promising strategies for clean and efficient hydrogen production. In this paper, an in-situ growth of iron-nickel phosphide on nickel foam (FeNiPx/NF) is demonstrated as a self-supported ternary catalyst for electrochemical water splitting. The FeNiPx/NF were prepared by a thermo-reaction between NaH2PO2 and NiFe hydroxide precursors that are in situ grown on Ni foam via a simple chemical precipitation reaction. In this newly proposed method, the nickel foam not only acts as an electrode substrate, but also serves as a slow-release Ni source in the reaction due to its oxidation by Fe3+ in solution. Benefiting from collaborative advantages of bimetallic composite, metallic phosphide, and unique electrode fabrication, the FeNiPx/NF exhibits extraordinarily high activities for both OER and HER with low overpotentials of of 192 and 106Â mV at 10Â mAÂ cmâ2, 236 and 161Â mV at 100Â mAÂ cmâ2, respectively. The voltage during the galvanostatic electrolysis is well maintained for almost 400Â h without any visible elevation, representing the few most stable noble-metal-free catalysts for water splitting.
Journal: Electrochimica Acta - Volume 242, 10 July 2017, Pages 260-267