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Name (Title):
Pavuluri Srinivasu (ICYS-MANA Researcher)
Affiliation:
International Center for Materials Nanoarchitectonics
(MANA), NIMS
Address:
1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
Email: Pavuluri.SRINIVASU@nims.go.jp
Home Page: http://www.nims.go.jp/mana/members/icys_mana_researcher/index.html
Presentation Title:
Development of Ordered Nanoporous Materials for Electrochemical Applications
Abstract:
Ordered nanoporous carbon materials are
potentially of great technological interest for
the development of electronic, catalytic,
hydrogen-storage systems and adsorption of
biomolecules [1-2]. The textural parameters
of the nanoporous carbon materials are
critical in many industrial applications
particularly, separation, adsorption and fuel
cells. However, a little attention has been
given in the studies to the textural parameters
control of nanoporous carbon materials. The
present study is focused on the preparation
ordered nanoporous carbon using a small
organic molecule namely glucose as a carbon
source.
The nanoporous carbons were prepared using MCM-48 as a template and samples are
designated as MCG-x where x denotes the glucose to template weight ratio. These materials
possess well ordered structure with regular particle size (Fig.). The specific pore volume is in the
range of 0.93-1.51 cm 3 /g and pore diameter in the range of 1.6-2.3 nm. The specific surface of
MCG-0.75 is 1384 m 2 /g and increases to 2073 m 2 Fig: HRSEM and TEM images of MCG-1.0 material
/g for MCG-1.0, which is higher than
nanoporous carbons prepared using sucrose as a carbon source. These exciting results indicate
that the carbon source with a small molecular size is critical to achieve the nanoporous carbon
materials with excellent textural characteristics. These results indicate that the textural parameters
of nanoporous carbon samples can be finely controlled using glucose as a carbon source. In
addition, the electro catalytic activity of MCG materials has been studied. It has been found that
the electric double layer capacitance is dependent on weight% of Pt loaded and textural
parameters of MCG materials. It has been found that MCG shows superior performance
compared with carbon black due to its large ordered pore channels which are continuous
connected with the large quantity of small pores in the carbon pore walls.
References:
[1] P. Srinivasu, S. Alam, V.V. Balasubramanian, S. Velmathi, D.P. Sawant, W. Bohlmann, S.P.
Mirajkar, K. Ariga, S.B. Halligudi, A.Vinu, Adv. Funct. Mater. 18 (2008) 640.
[2] A. Vinu, M. Miyahara and K. Ariga, J. Phys. Chem. B 109 (2005) 6436.
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Poster Session PIR-5