Reduction mechanism of nitrate on titanium

被引：0
作者：
机构：
[1] Komatsu, Atsushi
[2] Ishijima, Yasuhiro
[3] Motooka, Takafumi
[4] Ueno, Fumiyoshi
[5] Yamamoto, Masahiro
来源：
| 1600年 / Japan Society of Corrosion Engineering卷 / 62期
关键词：
Ccorrosion; Nitric acid; Oxide film; Reaction order; Reduction mechanism; Tafel slope; Titanium;
D O I：
10.3323/jcorr.62.198
中图分类号：
学科分类号：
摘要：
Reduction mechanism of nitrate ion on titanium electrode was investigated using electrochemical method. Cathodic polarization curve of titanium was measured in nitric acid with different concentrations of ions (H)+ NO-3 (HNO2). Reduction mechanism of nitrate ion on titanium was investigated from Tafel slope and reaction order of each ions. It was considered that reduction of titanium oxide was involved in reduction mechanism of nitrate ion on titanium, and reduction mechanism was suggested as follows. 3 3ad NO- →← NO- (QE) TiO2 + H+ + e- →← TiOOH (QE) (NO3ad - TiOOH) (NO-3 TiOOH)ad (RDS) (NO -3 - TiOOH) +H+ + e- →NO -2ad +TiO2 + H 2O.
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页码：198 / 203
页数：5
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