Ni foam supported Co3O4 nanosheet( Co3O4/Ni foam) electrode was prepared by electrodeposition, followed by a thermal treatment in air. The nanosheet was characterized by scanning electron microscopy ( SEM) , transmission electron microscopy( TEM) , X-ray diffraction( XRD) , X-ray photoelectron spectrometry (XPS) and Fourier transform infrared spectrometry(FTIR). The catalytic performance of the obtained elec-trode for H2O2 electroreduction in KOH solution was evaluated by means of linear scan voltammetry and chronoamperometry. The results show a current density of 0.386 A/cm2 in the solution containing 3.0 mol/L KOH and 0.4 mol/L H2O2 at-0.4 V( vs. Ag/AgCl) . The chronoamperometric current densities remain near-ly constant with a 1000 s test. The results indicate that Co3O4/Ni foam has considerable activity and stability for H2O2 electroreduction.%通过恒电势电沉积和加热处理在泡沫镍基体上制备了Co3 O4纳米片.利用扫描电子显微镜( SEM)、透射电子显微镜( TEM)、X射线衍射( XRD)、傅里叶变换红外光谱( FTIR)和X射线光电子能谱( XPS)等手段对纳米片的形貌和结构进行了表征.采用线性伏安扫描和计时电流技术研究了Co3 O4纳米片电极对H2 O2的电还原性能.结果表明,在3.0 mol/L KOH和0.4 mol/L H2 O2溶液中,当电压为-0.4 V( vs. Ag/AgCl)时,线性伏安扫描电流密度达到-0.386 A/cm2,在1000 s测试时间内,计时电流密度衰减很小,表明Co3 O4纳米片电极对H2 O2具有很高的活性和稳定性.
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