Thermal Decomposition of Platinum Chlorides and Application to the Pt-coated Electrodest

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  • KAMIYA Nobuyuki
    Department of Energy Engineering, Faculty of Engineering, Yokohama National University
  • Hosrnuo Ken-ichi
    Department of Energy Engineering, Faculty of Engineering, Yokohama National University
  • OTA Ken-ichiro
    Department of Energy Engineering, Faculty of Engineering, Yokohama National University

Bibliographic Information

Other Title
  • 白金塩化物の熱分解と白金被覆電極への応用
  • Thermal decomposition of platinum chlorides and application to the Pt-coated electrodes.

Description

The thermal decomposition of platinum chlorides was investigated by TG and DTA and characteristics of the Pt-coated electrodes were discussed. Both crystals and aqueous solutions of H2PtCl6.6H20 and PtCl4.5H20 were decomposed firstly into PtCl2 and finally into Pto of which forming temperatures were 330°C and 530°C, respectively. On the other hand, the TG curve showed that Pt(IV) was reduced to Pto at about 400°C when Pt(IV) was dissolved in butyl alcohol (n-BuOH). Titanium/Pt electrodes with large roughness were tentatively prepared by applying H2PtCl6-n-BuOH solution on Ti bases and heating even at lower temperature (300°C). The roughness was, however, lowered gradually as the heating temperature was risen. When the electrodes were prepared at higher temperature, the Ti/Pt joining points were better sintered and the exposed Ti, surface was also better protected against corrosion by formation of titanium(IV) oxide, so that the lifetime of the electrodes could be prolonged. Other organic reagents were examined as the solvents and it was concluded that the thermal decomposition of Pt(IV) in the organic reagents takes place readily via the redox reaction of a Pt(II)-complex.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1987 (2), 140-146, 1987-02-10

    The Chemical Society of Japan

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