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Nickel iron phosphide ultrathin nanosheets anchored on nitrogen-doped carbon nanoflake arrays as a bifunctional catalyst for efficient overall water splitting.

Authors
  • Bian, Jialin1
  • Song, Zeyi1
  • Li, Xianglin2
  • Zhang, Yuzhong1
  • Cheng, Chuanwei1
  • 1 Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, P. R. China. [email protected] [email protected] , (China)
  • 2 Hunan First Normal University, Changsha, Hunan 410205, P. R. China and Dongguan NanoFrontier Microelectronics Equipment Co., Ltd, Dongguan, Guangdong, 523808 P. R. China. , (China)
Type
Published Article
Journal
Nanoscale
Publisher
The Royal Society of Chemistry
Publication Date
Apr 02, 2020
Identifiers
DOI: 10.1039/c9nr10471b
PMID: 32239068
Source
Medline
Language
English
License
Unknown

Abstract

Development of high-efficiency and Earth-abundant bifunctional catalysts for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is desirable to realize an efficient overall water splitting process. In this work, a highly active and durable bifunctional catalyst of coral-like nickel iron phosphide ultrathin nanosheets anchored on nitrogen-doped carbon nanoflake arrays on carbon cloth (CC-NC-NiFeP) was fabricated by using metal organic framework (MOF) derived nitrogen-doped carbon nanoflake arrays as catalyst supports. Combined with the electronic structure regulation by bimetallic phosphides and using three dimensional nitrogen-doped carbon nanoflakes as supports that provide a large specific surface area as well as fast charge/mass transport, the as-prepared CC-NC-NiFeP yields excellent bifunctional electrocatalytic activity in both the HER and OER in an alkaline medium with an overpotential of 94 mV and 145 mV to reach a current density of 10 mA cm-2, respectively. Meanwhile, the CC-NC-NiFeP can behave as both a cathode and anode simultaneously for overall water splitting, achieving a low cell voltage of 1.54 V to reach a current density of 10 mA cm-2, which outperforms that of most of the non-precious metal based catalysts.

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