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Sequential Engineering of Ternary CuFeNi with a Vertically Layered Structure for Efficient and Bifunctional Catalysis of the Oxygen and Hydrogen Evolution Reactions.

07:00 EST 7th November 2018 | BioPortfolio

Summary of "Sequential Engineering of Ternary CuFeNi with a Vertically Layered Structure for Efficient and Bifunctional Catalysis of the Oxygen and Hydrogen Evolution Reactions."

Developing efficient and earth-abundant electrocatalysts for electrochemical water splitting is greatly desired due to growing energy demands. Herein, we develop a promising hierarchical nickel-iron-copper nitride electrode that is fabricated via a three-step process, starting with a hydrothermal synthesis of nickel-iron hydroxide on nickel foam and followed by the direct growth of copper metal-organic frameworks and, finally, low temperature ammonization. This approach yields a material that is an efficient catalyst for both the oxygen evolution reaction and the hydrogen evolution reaction. The as-fabricated heterostructured nickel-iron-copper nitride electrode exhibits an excellent activity with an overpotential of only 121 mV for the oxygen evolution reaction and an even lower overpotential of 33 mV for the hydrogen evolution reaction. Additionally, this structure displays strong long-term stability with only a negligible increase in potential after 500 cycles of uninterrupted CV testing. To the best of our knowledge, this as-prepared hierarchical nickel-iron-copper nitride is one of the most promising alternatives for the electrochemical oxygen and hydrogen evolution reactions.

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This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
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