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The unique composite of Ni@NiO core/shell structure and active carbon (AC) had been synthesized through a two-step method. The Ni 2+ was first reduced to Ni on the surface of AC supporter. Then the NiO shell was obtained after the following oxidized treatment. The transmission electron microscopy (TEM) observed that Ni@NiO particles with thin shell were sporadically dispersed on AC surface...
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