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Progress in Chemistry 2009, Vol. 21 Issue (6): 1107-1117 Previous Articles   Next Articles

• Review •

Advances and Some Problems in Electrocatalysis of DSA Electrodes

Kong Desheng**;  |Lu Wenhua ;  |Feng Yuanyuan ;  |Bi Siwei   

  1. (Department of Chemistry, Qufu Normal University, Qufu 273165, China)
  • Received: Revised: Online: Published:
  • Contact: Kong Desheng E-mail:kongdscn@eyou.com
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Titanium anodes coated with transient metal oxides, so-called dimensionally stable anodes (DSA®) have been studied extensively due to their excellent electrocatalytic activity for chlorine and oxygen evolutions and electrooxidation degradation of toxic organic compounds. But some fundamental and important questions in close relation with the electrocatalysis phenomenon of DSA have not been completely understood yet. After a short review of the recent progress of electrocatalysis of DSA, some deficiencies in the related studies are raised and discussed. Since the oxide coating plays an esential role in the electrocatalytic activity of DSA, it is emphasized that the solid state physicochemical properties (e.g. the electronic structure, potential distribution, charge transfer mechanisms, conductivity, etc.) of the bulk metal oxide coating in DSA electrode need to be further investigated in future studies. Both for understanding the essentiality of the electrocatalysis phenomena of DSA and for improving the electrocatalytic activity of DSA electrode by changing the chemical composition of its oxide coating more rationally, it is desired to establish more correlations of the electro-catalytic activity of DSA electrode with the solid state physico-chemical properties of the oxide coating bulk.

Contents
1 Introduction
2 Recent progress in the field of DSA electro-catalysis studies
2.1 Studying on electro-catalytic activity of DSA electrodes with different chemical compositions
2.2 Developing new methods for preparation of DSA electrodes
2.3 For the pretreatment of the substrate Ti
2.4 For the electro-catalytic degradation of organic pollutants
2.5 Studying on the electro-catalytic mechanisms at the electrode/solution interface
3 Some deficiencies in DSA electro-catalysis studies
4 Some topics needs to be further investigated in future studies
4.1 About the solid physico-chemical and electric properties of the oxide coatings
4.2 About the charge transfer and potential distribution at the Ti/oxide coating/solution interfaces
4.3 About the nano-size effect on the conductivity and charge-transfer mechnism
5 Concluding remarks

CLC Number: 

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