Flower-like NiFe oxide nanosheets on Ni foam as efficient bifunctional electrocatalysts for the overall water splitting

Bo Li, Qin Feng, Feng Jiang, Lizhi Peng, Tianfu Liu*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

5 引用 (Scopus)

摘要

Since the oxygen evolution reaction (OER) is a fundamental step in the overall water splitting process, it is necessary for an ideal catalyst to require a small amount of energy to overcome the energy barrier at the electrode-electrolyte interface. Therefore, developing highly active and integrated catalysts is of great significance. Herein, we present a facile and viable method to fabricate flower-like NiFe oxide nanosheets electrocatalysts that are directly grown on nickel foam substrates through a hydrothermal reaction. By tuning the Ni:Fe ratio, the as-synthesized NiFe oxide exhibits excellent catalytic activity that surpasses the activity of the RuO2 benchmark catalyst, when tested as an electrocatalyst for the overall water splitting reaction. More importantly, the optimized NiFe oxide electrode possesses excellent OER activity in 1 M KOH with small overpotentials of 255 and 280 mV at 10 and 50 mA cm -2 , respectively. When employed as a stable bifunctional catalyst to split water, this electrode achieved a current density of 10 mA cm -2 at a cell voltage of 1.59 V. This work presents a highly promising candidate for use as an electrode material and represents promising progress in its practical utilization and comprehensive industrialization.

源语言英语
页(从-至)4878-4890
页数13
期刊International Journal of Electrochemical Science
14
5
DOI
出版状态已出版 - 2019

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引用此

Li, B., Feng, Q., Jiang, F., Peng, L., & Liu, T. (2019). Flower-like NiFe oxide nanosheets on Ni foam as efficient bifunctional electrocatalysts for the overall water splitting. International Journal of Electrochemical Science, 14(5), 4878-4890. https://doi.org/10.20964/2019.05.24