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AuthorZhang, Qiting
AuthorWang, Yuhang
AuthorWang, Yongcheng
AuthorAl-Enizi, Abdullah M.
AuthorElzatahry, Ahmed A.
AuthorZheng, Gengfeng
Available date2021-03-18T10:15:11Z
Publication Date2016
Publication NameJournal of Materials Chemistry A
ResourceScopus
ISSN20507488
URIhttp://dx.doi.org/10.1039/c6ta00356g
URIhttp://hdl.handle.net/10576/17920
AbstractInspired by Myriophyllum, a natural plant, we report an efficient electrochemical water splitting device based on hierarchical TiN@Ni3N nanowire arrays. The bifunctional TiN@Ni3N nanowire arrays serve as both hydrogen evolution reaction (HER) and oxygen reaction evolution (OER) catalysts in this device. As a hydrogen evolution catalyst, the TiN@Ni3N nanowire arrays possess an onset overpotential of 15 mV vs. the reversible hydrogen electrode (RHE), a Tafel slope of 42.1 mV dec-1, and an excellent stability of <13% degradation after being operated for 10 h, much better than Pt disks and Ni3N nanosheets in alkaline electrolytes. For oxygen evolution performance, the Myriophyllum-like TiN@Ni3N nanowire arrays exhibit an onset potential of 1.52 V vs. RHE, and a high stability of 72.1% current retention after being measured for 16 h in the potentiostatic mode. Furthermore, a symmetric electrochemical water splitting device was assembled by using the Myriophyllum-like TiN@Ni3N nanowire arrays as two electrodes, possessing a water splitting onset of ?1.57 V with a current retention of 63.8% after 16 h of operation. The Royal Society of Chemistry 2016.
SponsorWe thank the following funding agencies for supporting this work: the National Key Basic Research Program of China (2013CB934104), the Natural Science Foundation of China (21322311 and 21473038), the Science and Technology Commission of Shanghai Municipality (14JC1490500), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, and the Collaborative Innovation Center of Chemistry for Energy Materials (2011-iChem). The authors would like to extend their sincere appreciation to the Deanship of Scientific Research at King Saud University for funding the Prolific Research group (PRG-1436-14).
Languageen
PublisherRoyal Society of Chemistry
SubjectCatalysts
Electrochemical electrodes
Electrodes
Nanowires
Slope stability
Titanium compounds
Titanium nitride
Alkaline electrolytes
Hydrogen evolution
Hydrogen evolution reactions
Nanowire arrays
Onset potential
Oxygen evolution
Potentiostatics
Reversible hydrogen electrodes
Nickel
TitleMyriophyllum -like hierarchical TiN@Ni3N nanowire arrays for bifunctional water splitting catalysts
TypeArticle
Pagination5713-5718
Issue Number15
Volume Number4
dc.accessType Abstract Only


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