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Preparation of Pt Catalysts Supported on ACF with CNF via Catalytic Growth
Preparation of Pt Catalysts Supported on ACF with CNF via Catalytic Growth
Carbon letters. 2010. Mar, 11(1): 38-40
Copyright ©2010, Korean Carbon Society
  • Received : December 12, 2009
  • Accepted : March 03, 2010
  • Published : March 30, 2010
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About the Authors
Sang-Sun Park
Department of Chemical Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
Jun Ki Rhee
The Specialized Graduate School of Hydrogen & Fuel Cell, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
Yu Kwon Jeon
The Specialized Graduate School of Hydrogen & Fuel Cell, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
Sung won Choi
Department of Chemical Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
Yong-Gun Shul
The Specialized Graduate School of Hydrogen & Fuel Cell, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
shulyg@yonsei.ac.kr
Abstract
Carbon supported electrocatalysts are commonly used as electrode materials for polymer electrolyte membrane fuel cells(PEMFCs). These kinds of electrocatalysts provide large surface area and sufficient electrical conductivity. The support of typical PEM fuel cell catalysts has been a traditional conductive type of carbon black. However, even though the carbon particles conduct electrons, there is still significant portion of Pt that is isolated from the external circuit and the PEM,resulting in a low Pt utilization. Herein, new types of carbon materials to effectively utilize the Pt catalyst are being evaluated.Carbon nanofiber/activated carbon fiber (CNF/ACF) composite with multifunctional surfaces were prepared through catalytic growth of CNFs on ACFs. Nickel nitrate was used as a precursor of the catalyst to synthesize carbon nanofibers(CNFs). CNFs were synthesized by pyrolysising CH 4 using catalysts dispersed in acetone and ACF(activated carbon fiber). The as-prepared samples were characterized with transmission electron microscopy(TEM), scanning electron microscopy(SEM). In TEM image, carbon nanofibers were synthesized on the ACF to form a three-dimensional network. Pt/CNF/ACF was employed as a catalyst for PEMFC. As the ratio of prepared catalyst to commercial catalyst was changed from 0 to 50%, the performance of the mixture of 30 wt% of Pt/CNF/ACF and 70wt% of Pt/C commercial catalyst showed better perfromance than that of 100% commercial catalyst. The unique structure of CNF can supply the significant site for the stabilization of Pt particles.CNF/ACF is expected to be promising support to improve the performance in PEMFC.
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Acknowledgements
2. This work was supported by NEW & Renewable Energy R&D program (2009T100100606) under the Ministry of Knowledge Economy, Republic of Korea.
References
Shinn-shyong T. , Kai-Hsuan H. , Tse-Hao K 2006 Carbon 44 859 -
Huang H. X , Chen S. X. , Yuan C 2008 J. Power Sources 175 166 -
Chen S. , Xu R. , Huang H. , Yi F. , Zhou X. , Zeng H 2007 J.Mater. Sci 42 9572 -
De Miguel S. J. , Villella J. I. , Jablonski E. L. , Scelza O.A. , de Lecea C. S. M. , Linares-Solano A 2002 Appl. Catal. A 232 237 -
Rodriguez N. M. , Chambers A. , Baker R. T. K 1995 Langmuir 11 3862 -
Park C , Baker R. T. K 1998 J. Phys. Chem. B 102 5168 -
Park C. , Baker R. T. K 1999 J. Phys. Chem. B 103 2453 -
Steigerwalt E. S. , Deluga G. A. , Cliffel D. E. , Lukehart C. M 2001 J. Phys. Chem. B 105 8097 -
Park I. S. , Park K. W. , Choi J. H. , Park C. R. , Sung Y. E 2007 Carbon 45 28 -
Downs W. B. , Baker R. T. K 1995 J. Mater. Res 10 625 -
Downs W. B. , Baker R. T. K 1991 Carbon 29 1173 -
Antolini E 2009 Applied catalysis B: Environmental 88 24 -