Electrochemical and XPS studies of the properties of oxide layers formed on a platinum electrode by anodic polarization in pure H2SO4 and in (H2SO4+CNS−

✍ Scribed by M. Kadeřávek; I. Paseka

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 500 KB
• Volume: 34
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(89)87076-8

✦ Synopsis

An electrochemical voltammetric analysis of oxide layers formed by anodic polarization of platinum electrodes over the potential range 2.43.0 V has shown that the reduction of the layers produced in pure H,SO, occurs in two well defined waves, whereas the oxides formed by polarization in CNScontaining solutions cannot be distinguished during the reduction into separate types. An XPS analysis has indicated that platinum oxide layers produced in pure 5 M H,SO, are composed of Pt + Pt(OH), with various Pt/O ratios, depending on the potential and time of polarization. Layers formed in solutions with added CNS-contain firmly bound nitrogen, but no sulphur.