NDLI: Efficient water splitting catalyzed by flexible NiP<sub>2</sub> nanosheet array electrodes under both neutral and alkaline solutions

Content Provider	Royal Society of Chemistry (RSC)
Author	Mu, Shichun Li, Wenqiang Amiinu, Ibrahim Saana Pu, Zonghua Xue, Ya
Copyright Year	2017
Abstract	Designing a non-noble-metal catalyst with high efficiency toward oxygen evolution reactions (OERs) is critical for renewable energy storage and conversion devices (e.g., water-splitting and metal–air batteries). In the current study, a flexible electrode of nickel diphosphide nanosheet arrays on carbon cloth (NiP2/CC) is synthesized through phosphidation of Ni(OH)2 nanosheet arrays as a precursor on the carbon cloth. The resultant three-dimensional (3D) porous nanosheet array architecture enhances the exposure of surface active sites and the release of gaseous products. When used as an OER catalyst, such an integrated 3D array electrode affords a current density of 4 mA cm−2 at an OER overpotential of 570 mV with good stability in neutral solution. Moreover, the NiP2/CC electrode also exhibits good OER performance (j = 20 mA cm−2 at η = 310 mV) under alkaline conditions. Notably, this electrode also shows high activity and stability under both neutral and alkaline media toward the HER. More importantly, when assembled as a symmetric full water splitting device with NiP2/CC as both the cathode and anode, a current density of 10 mA cm−2 at a voltage of 1.65 V is achieved in 1.0 M KOH solution. Owing to its low cost and high activity, NiP2/CC presents potential applications toward overall water splitting electrolysis and other electrochemical devices.
Starting Page	2154
Ending Page	2159
Page Count	6
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	41
Issue Number	5
Journal	New Journal of Chemistry
DOI	10.1039/c6nj03194c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Water splitting Electrode Nanosheet Anode Cathode Overpotential Carbon Three-dimensional space Renewable energy Electrolysis Oxygen evolution Electrochemistry Nickel Current density
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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