Elucidation of the electrodeposition mechanism of molybdenum oxide from iso- and peroxo-polymolybdate solutions

Todd M. McEvoy, Keith J. Stevenson

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

The cathodic electrodeposition of molybdenum oxide thin films prepared from aqueous solutions containing iso-polymolybdates and peroxo-polymolybdates is described. Chronocoulometry, x-ray photoelectron spectroscopy, spectroelectrochemistry, and electrochemical quartz crystal microgravimetry were used to establish corresponding reaction mechanisms for films grown at different deposition potentials. Electrodeposition from acidified iso-polymolybdate solutions proceeds by the reduction of molybdic acid, whereas deposition from aqueous peroxo-based solutions involves the graded reduction of several solution components, primarily comprising molybdic acid and peroxo-polymolybdates. Careful regulation of the deposition potential allows for controlled growth of distinct molybdenum oxide compositions producing films with varied water content and valency.

Original languageEnglish
Pages (from-to)429-438
Number of pages10
JournalJournal of Materials Research
Volume19
Issue number2
DOIs
Publication statusPublished - Feb 2004
Externally publishedYes

Fingerprint

Dive into the research topics of 'Elucidation of the electrodeposition mechanism of molybdenum oxide from iso- and peroxo-polymolybdate solutions'. Together they form a unique fingerprint.

Cite this