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Effect of Oxalic Acid Etching on Morphology and Electrocatalytic Activity of Oxide Anodes |
CHU Liying; XU Likun; WU Lianbo;WANG Tingyong; WANG Juntao;CHEN Guangzhang |
State Key Laboratory for Marine Corrosion and Protection; Luoyang Ship Materials Research Institute; Qingdao 266071 |
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Cite this article:
CHU Liying; XU Likun; WU Lianbo; WANG Tingyong; WANG Juntao; CHEN Guangzhang. Effect of Oxalic Acid Etching on Morphology and Electrocatalytic Activity of Oxide Anodes. Acta Metall Sin, 2005, 41(7): 763-768 .
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Abstract IrO2--Ta2O5 oxide anode was prepared by coating
oxide on titanium substrate which has
been pretreated by sandblast and oxalic acid etching. ESEM,
polarization curve and EIS indicated that the corrosion rate of the
substrate and the loading of the oxide coating (i.e. Ir content)
increase with etching time at the initial stage and then
decrease. The oxide coating
on the substrate pretreated by suitable etching pretreatment is of a
uniform and compact surface which has large electrochemical active
surface area, fine electrocatalytic
activity for oxygen evolution and high stability.
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Received: 04 November 2004
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