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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2010,Vol.26>> Issue(01)>> 29-33     doi: 10.3866/PKU.WHXB20100102         中文摘要
ELECTROCHEMISTRY
Catalytic Behavior of NiCo2O4 for H2O2 Electroreduction in Alkaline Medium
GAO Yin-Yi, CAO Dian-Xue, WANG Gui-Ling, YIN Cui-Lei
College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China
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NiCo2O4 nanoparticles were synthesized using a sol-gel method. Their structures and morphologies were characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). Results indicate that NiCo2O4 has a spinel structure and an average diameter of around 15 nm. The catalytic behavior of NiCo2O4 for H2O2 electroreduction in alkaline medium was investigated by linear potential sweep and chronoamperometry. NiCo2O4 shows considerable activity and stability for the electrocatalytic reduction of H2O2. The electroreduction occurs mainly via a direct pathway at H2O2 concentrations lower than 0.6 mol·L-1. An Al-H2O2 semi-fuel cell was constructed using NiCo2O4 as the cathode catalyst. The cell displays an open circuit voltage of 1.6 V and a peak power density of 209 mW·cm-2 at a current density of 220 mA·cm-2 running on 1.0 mol·L-1 H2O2 at ambient temperature.



Keywords: Electroreduction   Nickel cobaltite   Hydrogen peroxide   Cathode catalyst   Metal semi-fuel cell  
Received: 2009-09-09 Accepted: 2009-10-16 Publication Date (Web): 2009-11-09
Corresponding Authors: CAO Dian-Xue Email: caodianxue@hrbeu.edu.cn


Cite this article: GAO Yin-Yi, CAO Dian-Xue, WANG Gui-Ling, YIN Cui-Lei. Catalytic Behavior of NiCo2O4 for H2O2 Electroreduction in Alkaline Medium[J]. Acta Phys. -Chim. Sin., 2010,26 (01): 29-33.    doi: 10.3866/PKU.WHXB20100102
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