Authors: Koduri, P.¹; Sunkara, M.K.¹; Dickey, E.C.²; Frazier, C.²; Babu, S.V.³

Source: Surface Engineering, Volume 15, Number 5, October 1999 , pp. 373-376(4)

Publisher: Maney Publishing

Abstract:

The structural and electrochemical characteristics of metal doped diamondlike carbon films with conductivities higher that 5 Ω^-1 cm^-1 are investigated using TEM and electrochemical characterisation techniques. Cyclic voltammetry of hafnium doped diamondlike carbon films in acidic solutions shows that these films are electrochemically stable compared with pure hafnium metal surfaces. Highly doped Cr–DLC films show the presence of metal dopant in the form of nanoclusters while moderately doped films show randomly dispersed chromium metal dopant. In addition, these Cr–DLC films with nanoclusters of metal dopant show two orders of magnitude enhancement in electrochemical activity with gas evolution in acidic environments compared with the Cr–DLC films with randomly dispersed metal dopant. This difference is attributed to possible electrocatalytic activity of nanoclusters.

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/026708499101516713

Affiliations: 1: The Department of Chemical Engineering, University of Louisville, Louisville, 40292 KY, USA 2: The Department of Chemical and Materials Engineering, University of Kentucky, Lexington, 40506 KY, USA 3: The Department of Chemical Engineering, Clarkson University, Potsdam, 13699 NY, USA

Publication date: 1999-10-01

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