Supported NiOx Nanocatalysts on Graphene for Nonenzymatic Lactate Sensing
Wenyu Gao,
Xiaoyi Guan,
Jie Wang
et al.
Abstract:Electrodeposition of nickel nanoparticles, achieved through potentiostatic amperometry followed by thermal annealing at 200−400 °C, has produced nickel oxide nanoparticles on flexible graphene substrates. Using transmission electron microscopy and depth-profiling X-ray photoelectron spectroscopy, we demonstrate that the resulting NiO x nanoparticles exhibit several Ni oxidation states and a core−shell heterostructure, with a metallic Ni crystalline core and a NiO crystalline shell with a mixed crystalline−amor… Show more
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