Co_3O_4纳米片的制备及对H_2O_2电还原反应的催化性能  

Preparation of Co_3O_4 Nanosheet Supported on Ni Foam and Its Catalytic Performance for H_2O_2 Electroreduction

作　　者：程魁[1] 杨帆[1] 闫鹏 曹殿学[1] 殷金玲[1] 王贵领[1] 

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,哈尔滨150001

出　　处：《高等学校化学学报》2014年第1期110-114,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21306033);中央高校基本科研基金(批准号:HEUCF2013091003)资助~~

摘　　要：通过恒电势电沉积和加热处理在泡沫镍基体上制备了Co3O4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Co3O4纳米片电极对H2O2的电还原性能.结果表明,在3.0 mol/L KOH和0.4 mol/L H2O2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Co3O4纳米片电极对H2O2具有很高的活性和稳定性.Ni foam supported Co304 nanosheet（ Co3 O4/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 （FI＇IR）. The catalytic performance of the obtained elec- trode for H2O2 electroreduction in KOH solution was evaluated by means of linear scan vohammetry 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/AgC1）. 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.

关 键 词：四氧化三钴 纳米片 电沉积 过氧化氢 电还原 

分 类 号：O646[理学—物理化学]