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NiFe Alloy Integrated with Amorphous/Crystalline NiFe Oxide as an Electrocatalyst for Alkaline Hydrogen and Oxygen Evolution Reactions by Guoyu Shi; Chisato Arata; Donald A. Tryk; Tetsuro Tano; Miho Yamaguchi; Akihiro Iiyama; Makoto Uchida; Kazuo Iida; Sumitaka Watanabe; Katsuyoshi Kakinuma is a Engineering article available to read on EtoBox.
What is NiFe Alloy Integrated with Amorphous/Crystalline NiFe Oxide as an Electrocatalyst for Alkaline Hydrogen and Oxygen Evolution Reactions about?
The rational design of efficient and low-cost electrocatalysts based on earth-abundant materials is imperative for large-scale production of hydrogen by water electrolysis. Here we present a strategy to prepare highly active catalyst materials through modifying the crystallinity of the surface/interface of strongly coupled transition metal–metal oxides. We have thermally activated the catalysts to construct amorphous/crystalline Ni–Fe oxide interfaced with a conductive Ni–Fe alloy and systematically investigated their electrocatalytic performance toward the hydrogen evolution and oxygen evolution reactions (HER and OER) in alkaline solution. It was found that the Ni–Fe/oxide material with a crystalline surface oxide phase showed remarkably superior HER activity in comparison with its amorphous or poorly crystalline counterpart. In contrast, interestingly, the amorphous/poorly crystalline oxide significantly facilitated the OER activity in comparison with the more crystalline counterpart. On one hand, the higher HER activity can be ascribed to a favorable platform for water dissociation and H–H bond formation, enabled by the unique crystalline metal/oxide structure. On the other han
Who reads NiFe Alloy Integrated with Amorphous/Crystalline NiFe Oxide as an Electrocatalyst for Alkaline Hydrogen and Oxygen Evolution Reactions?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Guoyu Shi; Chisato Arata; Donald A. Tryk; Tetsuro Tano; Miho Yamaguchi; Akihiro Iiyama; Makoto Uchida; Kazuo Iida; Sumitaka Watanabe; Katsuyoshi Kakinuma
- Publisher
- American Chemical Society (ACS)
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)