Affordable Access

Publisher Website

Reactivity of hydrous rhodium oxide films in base

Journal of Electroanalytical Chemistry
Publication Date
DOI: 10.1016/s0022-0728(81)80009-5


Abstract Hydrous oxide films of appreciable thickness, produced on rhodium in base under potential cycling conditions, were observed to be only partially active with regard to charge-storage behaviour. A substantial increase in the charge capacity of such films, apparently to a level encompassing all cations in the film, was observed on prolonged, slow cycling, evidently due to restructuring of the more material in the surface layer. Subjecting the latter to polarization (under either cyclic or steady conditions) at potentials above about 1.6 V resulted in changes in both redox and electrochromic behaviour which were interpreted in terms of partial dehydration of the surface layer. Both the charge-storage and electrical conductivity behaviour of these films are discussed in terms of a recently proposed open polymer (or skeletal) model. The importance of stabilization of the lower oxidation state of the cations, due to complex formation with hydroxide ions, in the oxide growth reaction is also pointed out. Heating the charge-storage layer to about 170°C resulted in a more adherent, probably anhydrous, film which was inactive with regard to charge-storage and electrochromic behaviour.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

The thermal behavior of amorphous rhodium hydrous...

on Journal of Alloys and Compound... Jan 01, 2001

Properties of thin, hydrous Pd oxide films

on Journal of Electroanalytical C... Jan 01, 1997

Early stages of growth of hydrous platinum oxide f...

on Journal of Electroanalytical C... Jan 01, 1991

The stability of hydrous oxide films on gold

on Journal of Electroanalytical C... Jan 01, 1990
More articles like this..