1. Bimetal-organic framework-derived nanorod-like FexNi1−x@C, P composites for electrochemical hydrogen evolution.
- Author
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Wang, Yue, Zhang, Jingrui, Wang, Xingwen, Meng, Wei, Ren, Dongmei, Tong, Boran, and Han, Chao
- Subjects
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HYDROGEN evolution reactions , *WATER electrolysis , *HYDROGEN as fuel , *HYDROGEN , *HYDROGEN production , *DOPING agents (Chemistry) - Abstract
Electrocatalytic decomposition of water using bifunctional catalysts is a potential method for clean hydrogen energy production. In order to solve the weakness of present catalysts, this study rationally designed a novel iron-nickel bifunctional electrocatalyst of Fe x Ni 1−x @C, P composites prepared by pyrolysis and phosphorus doping of a FeNi-bimetal-organic framework (FeNi-MOF). The innovative combination of FeNi bimetallic co-doping, low-temperature curing and phosphating has bred an excellent electrocatalyst for the hydrogen evolution reaction (HER) in alkaline solution. When the mass ratio of phosphate to Fe x Ni 1−x @C 250–800 was 10:1, Fe x Ni 1−x @C 250–800 , P (10:1) showed the highest hydrogen evolution activity, obtaining a low 189 mV hydrogen evolution overpotential with a Tafel slope of 91.9 mV·dec−1 at 10 mA·cm−2 current density. Meanwhile, Fe x Ni 1−x @C 250–800 , P exhibited good stability during HER process. This work would open up a novel pathway for designing efficient and stable bifunctional electrocatalysts for water electrolysis as well as sustainable chemistry applications. • A novel electrocatalyst of P-doped carbon-supported FeNi alloys (Fe x Ni 1−x @C, P) was first designed for HER. • Fe x Ni 1−x @C, P has bred an excellent electrocatalyst for the hydrogen evolution reaction in alkaline media. • P-doped carbon-supported FeNi alloys offer numerous effective active sites and accelerate electrons transfer. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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