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Journal of Inorganic Materials

Journal of Inorganic Materials >

2006 , Vol. 21 >Issue 6: 1362 - 1366

DOI: https://doi.org/10.3724/SP.J.1077.2006.01362

Research Paper

Effects of Preparation Conditions of MnOx Coatings on Characteristics of Ti/SnO2+Sb2O3/MnOx Anodes

  • WANG Ya-Qiong ,
  • GU Bin ,
  • XU Wen-Lin ,
  • LU Lu-De
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  • (1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; 2. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China)

Received date: 2005-12-12

  Revised date: 2006-02-23

  Online published: 2006-11-20

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Abstract

MnOx coatings deposited on a Ti/SnO2+Sb2O3 were prepared by the thermal decomposition of Mn(NO3)2. Surface morphology and microstructure of the coating were investigated by X-ray diffraction and scanning electron microscopy. The electrocatalytic activity of the anodes was assessed by polarization curves and voltammetric charge at 25C and 1.0mol/L in aqueous H2SO4, and accelerated life tests were performed at 60C and 1.0mol/L in aqueous H2SO4 with an anodic current density of 4.0A/cm2. The aim of this work was to prepare anodes based on ternary oxides showing high stability and electro-catalytic activity in acid solution. The XRD analysis reveals that MnO2 is formed at 200℃, after that, MnO2 and Mn2O3 coexist between 300℃ and 400℃ and above 450℃ main composition is Mn2O3. It is suggested that calcination temperatures affect the electro-catalytic activity and the lifetime of the anodes. The anode possesses relatively low overpotential, when the coexistence of
MnO2 and Mn2O3. The Ti/SnO2+Sb2O3/MnOx electrode, the MnOx coatings prepared at 400℃, exhibits excellent electrocatalytic activity and higher coating stability with accelerated life of 39h.

Key words： MnOx; anode; titanium

Cite this article

WANG Ya-Qiong , GU Bin , XU Wen-Lin , LU Lu-De . Effects of Preparation Conditions of MnOx Coatings on Characteristics of Ti/SnO2+Sb2O3/MnOx Anodes[J]. Journal of Inorganic Materials, 2006 , 21(6) : 1362 -1366 . DOI: 10.3724/SP.J.1077.2006.01362

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