NDLI: Dual-valence nickel nanosheets covered with thin carbon as bifunctional electrocatalysts for full water splitting

Content Provider	Royal Society of Chemistry (RSC)
Author	Ren, Zhiyu Wu, Jun Meng, Huiyuan Zhu, Jiaqing Kong, Lingjun Xue, Yuzhu Fu, Honggang Xi, Wang Du, Shichao
Copyright Year	2016
Abstract	The viability of clean hydrogen energy strongly depends on the efficient non-precious metal-based electrocatalysts. Herein, thin carbon coated nickel-based nanosheets (Ni@C NSs) were designed and synthesized by controlling the successive assembly and carbothermal reduction under an inert atmosphere. The nanosheets were assembled by partially reduced Ni nanoparticles and NiO nanoparticles wrapped in thin graphitic carbon. Dodecyl amine played a vital role in the structure-directing of the interconnected nanosheets by suppressing the nanoparticles growth and providing a protective effect on the low-valence nickel. The resulting metallic Ni and NiO were the effective active sites for hydrogen and oxygen evolution, respectively; moreover, the neighboring other nickel species could exert a good synergetic effect on the electrocatalytic reaction. The outside thin carbon film was also conducive to the electrochemical stability. Furthermore, based on the practical application considerations, the Ni@C NSs were directly grown on the Ni foam surface. The water electrolyser made up of Ni@C NSs/Ni foam electrodes presented a 1.57 V cell voltage in an alkaline medium accompanied with long-term durability. The highly active transition-metal catalysts with two valences is promising for full water splitting devices.
Starting Page	7297
Ending Page	7304
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	4
Issue Number	19
Journal	Journal of Materials Chemistry A
DOI	10.1039/c6ta00894a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Hydrogen Carbon Carbothermic reaction Nickel Oxygen evolution Electrochemistry Electrolysis Water splitting
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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