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Catalytic mechanism of graphene-nickel interface dipole layer for binder free electrochemical sensor applications

Title
Catalytic mechanism of graphene-nickel interface dipole layer for binder free electrochemical sensor applications
Authors
Zhang, ChunfeiLee, Byong-JuneLi, HaipingSamdani, JitendraKang, Tong-HyunYu, Jong-Sung
DGIST Authors
Yu, Jong-Sung
Issue Date
2018-12
Citation
Communications Chemistry, 1(1), 94
Type
Article
Article Type
Article
Keywords
WORK FUNCTIONGLUCOSENANOSHEETSNANOPARTICLESFABRICATIONDEPOSITIONELECTRODEFOAM1ST-PRINCIPLESREDUCTION
ISSN
2399-3669
Abstract
The combination of graphene with metal nanoparticles can produce enhanced catalytic properties because of synergistic effects, and has been used to develop highly active catalysts for different applications. However, the mechanism of the synergistic effect between graphene and metal is poorly understood. Here we demonstrate that graphene-coated nickel foam shows a significant catalytic effect on electrodeless metal (gold, platinum, silver, and copper) deposition without any external reducing agent. This is attributed to the formation of an interface dipole layer, induced by the interaction between graphene and nickel. The interface dipole layer catalytic mechanism accelerates metal reduction reaction and explains the simultaneous formation of nickel hydroxide. The nickel hydroxide-wrapped silver hybrid self-assembly developed on the graphene-coated nickel foam serves as an efficient binder-free electrochemical sensor owing to its hierarchical structure. © 2018, The Author(s).
URI
http://hdl.handle.net/20.500.11750/10816
DOI
10.1038/s42004-018-0088-x
Publisher
Nature Publishing Group
Related Researcher
  • Author Yu, Jong-Sung Light, Salts and Water Research Group
  • Research Interests Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
Files:
Collection:
Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles


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