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Volume 6 Research & Reviews: Journal of Material Sciences Advanced Materials 2018
September 19-21, 2018
September 19-21, 2018 Tokyo, Japan
22nd International Conference on
Advanced Materials and Nanotechnology
Se-Hun Kwon et al., Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C4-024
Synthesis and functionalization of nano-catalysts for using a fluidized-bed reactor type powder atomic
layer deposition
Se-Hun Kwon1, Ji-Hoon Ahn2, Chang-Min Kim1 and Cheol Min Hyun2
1Pusan National University, Republic of Korea
2Korea Maritime and Ocean University, Republic of Korea
Functional nano-catalysts have been received a great attention due to its technological and economical importance in water
splitting and purification, fuel cells, energy storages, etc. One of the major challenge in those areas is to find a practical way
to lower the use of expensive noble metals, while maintaining or improving its catalytic properties. Among various synthesis
techniques, Atomic Layer Deposition (ALD) is recently focused on these areas. ALD has many inherent merits such as an
excellent thickness control at the sub-angstrom scale, high conformality even on nano-sized complex structues with high
aspect ratios. When ALD process is utilized to deposit metals such as Pt, Ru, Ir, etc, it is possible to produce very small sized
nanoparticles during the initial growth stage. Using this initial growth stage of ALD, many researchers have tried to use ALD
in the application of catalysts. And, recently developed ALD technique, which is called as powder-ALD, enables this practical
this presentation, we introduce our recent research of Fluidized-Bed Reactor (FBR) type powder ALD for Pt
based nano-catalyst of polymer electrolyte fuel cells. With an optimized process condition, we showed that lower Pt loaded
nano-catalyst, compared with commercial one, can be succesfully prepared and can exhibit an improved catalytic properties
due to its higher electrochemical surface area.
Biography
Se-Hun Kwon has received his BS, MS, PhD and Post-doctoral Associate from Department of Materials Science and Engineering from Korea Advanced Institute of
Science and Technology (KAIST). His group is focusing on the design and synthesis of functional materials using Atomic Layer Deposition (ALD) techniques and on
the fabrication of nanostructures for semiconductors, photovoltaic devices and nanodevices by utilizing a hybrid bottom-up and top-down fabrication approaches.