Cr-Doped FeNi-P Nanoparticles Encapsulated into N-Doped Carbon Nanotube as a Robust Bifunctional Catalyst for Efficient Overall Water Splitting

Advanced Materials
Yiqiang WuXihong Lu

Abstract

Exploring high-efficiency, stable, and cost-effective bifunctional electrocatalysts for overall water splitting is greatly desirable and challenging. Herein, a newly designed hybrid catalyst with Cr-doped FeNi-P nanoparticles encapsulated into N-doped carbon nanotubes (Cr-doped FeNi-P/NCN) with unprecedented electrocatalytic activity is developed by a simple one-step heating treatment. The as-synthesized Cr-doped FeNi-P/NCN with moderate Cr doping exhibits admirable oxygen evolution reaction and hydrogen evolution reaction activities with overpotentials of 240 and 190 mV to reach a current density of 10 mA cm-2 in 1 m KOH solution. When used in overall water splitting as a bifunctional catalyst, it needs only 1.50 V to give a current density of 10 mA cm-2 , which is superior to its typically integrated Pt/C and RuO2 counterparts (1.54 V @ 10 mA cm-2 ). Density functional theory calculation confirms that Cr doping into a FeNi-host can effectively alter the relative Gibbs adsorption energy and reduces the theoretical overpotential. Additionally, the synergetic effects between Cr-doped FeNi-P nanoparticles and NCNs are regarded as significant contributors to accelerate charge transfer and promote electrocatalytic activity in hybri...Continue Reading

References

Mar 26, 2016·Science·Bo ZhangEdward H Sargent
Dec 28, 2016·Advanced Materials·Yusuf Valentino KanetiYusuke Yamauchi
Jan 14, 2017·Chemical Society Reviews·Nian-Tzu SuenHao Ming Chen
Jul 8, 2017·Journal of the American Chemical Society·Yanli ChenXiaoxin Zou
May 29, 2018·Sexual Development : Genetics, Molecular Biology, Evolution, Endocrinology, Embryology, and Pathology of Sex Determination and Differentiation·Maria L IezziAlberto Verrotti
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Citations

Mar 23, 2021·Advanced Materials·Ben ZhangChong Cheng
May 22, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Xuefeng YuXinglong Gou
Jan 26, 2022·ACS Applied Materials & Interfaces·Svenja BauesGunther Wittstock

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