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May 13-14, 2019 | Prague, Czech Republic
Chemistry and Medicinal Chemistry
9th World Congress on
Page 25
Asian Journal of Biomedical and Pharmaceutical Sciences | Volume 9 ISSN: 2249-622X
Mineo Hiramatsu
Meijo University, Japan
3D graphene network as catalyst support material for
electrochemical applications
Graphene-based materials have attracted much
attention due to their outstanding properties as well as
emerging applications. Carbon nanowalls (CNWs) are few-
layer graphenes standing vertically on a substrate forming
a self-supported network of 3-dimensional wall structures.
CNWs and similar vertical graphene structures are
sometimes decorated with metal nanoparticles. The maze-
like architecture of CNWs with large-surface-area graphene
planes would be useful as electrodes for energy devices
and electrochemical sensors. CNWs can be synthesized
by plasma enhanced chemical vapor deposition (PECVD)
techniques on heated substrates (600-750 ˚C) employing
methane and hydrogen mixtures. The height of CNWs
increases almost linearly with the growth period, while the
thickness of walls and interspaces between adjacent walls
are almost constant. We have carried out CNW growth
using PECVD, and the surface of CNWs was decorated with
Pt nanoparticles by the reduction of chloroplatinic acid
or by the metal-organic chemical deposition employing
supercritical fluid. We report the performances of fuel
cell and hydrogen peroxide sensor, where CNW electrode
was used. From the electrochemical evaluation, it was
confirmed that Pt-supported CNWs had seven times higher
durability than the conventional carbon black. In the case
of hydrogen peroxide sensing, amperometric response
results indicated that the Pt-decorated CNWs exhibited
a wide linear range of 10–1500 μM. Electrochemical
experiments demonstrate that CNWs offer great promise
for providing a new class of nanostructured electrodes for
fuel cell and electrochemical applications.
Speaker Biography
Mineo Hiramatsu is a Full Professor of Department of Electrical and
Electronic Engineering and the Director of Research Institute, Meijo
University, Japan. His main fields of research are plasma diagnostics and
plasma processing for the synthesis of thin films and nanostructured
materials. He served as chairman and member of organizing and
scientific committees of international conferences on plasma chemistry
and plasma processing. He was awarded the Japan Society of Applied
Physics Fellow in 2017.
e:
Mineo Hiramatsu, Asian J Biomed Pharmaceut Sci, Volume:9
DOI: 10.4066/2249-622X-C2-019
Notes: