CAJ | 학술논문

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.
통과항전세전침적화가열처리재포말얼기체상제비료Co3 O4납미편.이용소묘전자현미경( SEM)、투사전자현미경( TEM)、X사선연사( XRD)、부리협변환홍외광보( FTIR)화X사선광전자능보( XPS)등수단대납미편적형모화결구진행료표정.채용선성복안소묘화계시전류기술연구료Co3 O4납미편전겁대H2 O2적전환원성능.결과표명,재3.0 mol/L KOH화0.4 mol/L H2 O2용액중,당전압위-0.4 V( vs. Ag/AgCl)시,선성복안소묘전류밀도체도-0.386 A/cm2,재1000 s측시시간내,계시전류밀도쇠감흔소,표명Co3 O4납미편전겁대H2 O2구유흔고적활성화은정성.
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.