Controlling the Nanostructure of RuO2/Carbon Nanotube Composites by Gas Annealing

We fabricated RuO2/carbon nanotube (CNT) composites by coating the CNTs with an amorphous RuOx layer using metallorganic chemical vapor deposition followed by postannealing at a relatively low temperature of 350DGC. It was found that the kind of gas used during the postannealing process should affec...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2005-01, Vol.152 (2), p.D23-D25
Main Authors: Kim, Jung Dae, Kang, B S, Noh, T W, Yoon, Jong-Gul, Baik, S I, Kim, Y-W
Format: Article
Language:English
Online Access:Get full text
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Summary:We fabricated RuO2/carbon nanotube (CNT) composites by coating the CNTs with an amorphous RuOx layer using metallorganic chemical vapor deposition followed by postannealing at a relatively low temperature of 350DGC. It was found that the kind of gas used during the postannealing process should affect the nanostructure of the RuO2/CNT composites quite significantly. Starting with a thin RuOx coating layer, we could obtain relatively uniform-sized spherical and elliptical RuO2 nanoparticles by using At and O2 gas, respectively, during the postannealing. The growth behaviors of the RuO2 nanoparticles could be explained in terms of surface self-diffusion. The surface diffusion process can provides a way to fabricate RuO2/CNT nanocomposites with a controllable geometrical shape and size, whose process can be used for diverse applications, such as high-performance supercapaciwr electrodes, electrocatalysts, gas sensors, and new electrodevices.
ISSN:0013-4651
DOI:10.1149/1.1847672