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ACS Appl Mater Interfaces. 2018 Jan 31;10(4):3699-3706. doi: 10.1021/acsami.7b18671. Epub 2018 Jan 17.

Metallic Intermediate Phase Inducing Morphological Transformation in Thermal Nitridation: Ni3FeN-Based Three-Dimensional Hierarchical Electrocatalyst for Water Splitting.

Author information

1
State Key Laboratory of Crystal Materials, Shandong University , Jinan, Shandong 250100, China.
2
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University , Jinan 250014, China.
3
Beijing Synchrotron Radiation Facility (BSRF), Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China.
4
Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan , Jinan, Shandong 250022, China.

Abstract

Transition-metal nitrides have attracted a great deal of interest as electrocatalysts for water splitting due to their super metallic performance, high efficiency, and good stability. Herein, we report a novel design of hierarchical electrocatalyst based on Ni3FeN, where the presence of carbon fiber cloth as a scaffold can effectively alleviate the aggregation of Ni3FeN nanostructure and form three-dimensional conducting networks to enlarge the surface area and simultaneously enhance the charge transfer. The composition and morphological variations of NiFe precursors during annealing in different atmospheres were investigated. Such Ni3FeN/CC hierarchical electrocatalyst shows much improved electrochemical properties for water splitting in terms of overpotentials (105 and 190 mV at 10 mA/cm2 for hydrogen evolution reaction and oxygen evolution reaction, respectively) and stability.

KEYWORDS:

3D conductive networks; electrochemical water splitting; hierarchical electrocatalyst; intermediate; synergistic effect

PMID:
29313661
DOI:
10.1021/acsami.7b18671

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