Identification of Mo(V) commonly observed in passive films formed on stainless steels

✍ Scribed by Kim, Dongil; Kagwade, S. V.; Clayton, C. R.

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 324 KB
• Volume: 26
• Category: Article
• ISSN: 0142-2421
• DOI: 10.1002/(sici)1096-9918(199802)26:2<155::aid-sia353>3.0.co;2-b

✦ Synopsis

There has been a longstanding debate and controversy in the literature with regard to the determination by XPS of the exact oxidation state of a molybdenum species commonly observed in the passive Ðlms of stainless steel. In this paper we have compared both the XPS and ESR analyses of molybdenum oxyhydroxides previously postulated to contain Mo(V) as well as Mo(IV) and Mo(VI). The compositions of these compounds closely resemble those found in the passive Ðlms of Mo-bearing stainless steel. It has been shown that the same Mo species exhibiting an XPS Mo spectrum binding energy value of 230.8 eV is observed to exhibit an ESR spectra having a g factor of 3d 5¿2 1.921, which corresponds to Mo(V).