Browse > Article
http://dx.doi.org/10.3740/MRSK.2011.21.8.419

Methanol Electro-Oxidation of Electro-Spun RuO2 Nanowire Supported Pt Catalysts  

Yeom, Yong-Sik (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Ahn, Hyo-Jin (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Publication Information
Korean Journal of Materials Research / v.21, no.8, 2011 , pp. 419-424 More about this Journal
Abstract
Pt nanoparticle catalysts incorporated on $RuO_2$ nanowire support were successfully synthesized and their electrochemical properties, such as methanol electro-oxidation and electrochemically active surface (EAS) area, were demonstrated for direct methanol fuel cells (DMFCs). After fabricating $RuO_2$ nanowire support via an electrospinning method, two different types of incorporated Pt nanoparticle electrocatalysts were prepared using a precipitation method via the reaction with $NaBH_4$ as a reducing agent. One electrocatalyst was 20 wt% Pt/$RuO_2$, and the other was 40 wt% Pt/$RuO_2$. The structural and electrochemical properties of the Pt nanoparticle electrocatalysts incorporated on electrospun $RuO_2$ nanowire support were investigated using a bright field transmission electron microscopy (bright field TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry. The bright field TEM, XRD, and XPS results indicate that Pt nanoparticle electrocatalysts with sizes of approximately 2-4 nm were well incorporated on the electrospun $RuO_2$ nanowire support with a diameter of approximately 50 nm. The cyclic voltammetry results showed that the Pt nanoparticle catalysts incorporated on the electrospun $RuO_2$ nanowire support give superior catalytic activity in the methanol electro-oxidation and a higher electrochemically active surface (EAS) area when compared with the electrospun Pt nanowire electrocatalysts without the $RuO_2$ nanowire support. Therefore, the Pt nanoparticle catalysts incorporated on the electrospun $RuO_2$ nanowire support could be a promising electrode for direct methanol fuel cells (DMFCs).
Keywords
electrocatalysts; electrospinning; nanowires; $RuO_2$; methanol electro-oxidation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
연도 인용수 순위
1 H. -J. Ahn, J. -S. Jang, Y. E. Sung and T. -Y. Seong, J. Alloy. Comp., 473, L28 (2009).   DOI   ScienceOn
2 S. Barth, F. Hernandez-Ramirez, J. D. Holmes and A. Romano-Rodriguez, Progr. Mater. Sci., 55, 563 (2010).   DOI   ScienceOn
3 H. -J. Ahn, H. -C. Choi, K. -W. Park, S. -B. Kim and Y. -E. Sung, J. Phys. Chem. B, 108, 9815 (2004).   DOI   ScienceOn
4 X. Ye, J. Sha, Z. Jiao and L. Zhang, Nanostruct. Mater., 8, 919 (1997).   DOI   ScienceOn
5 J. F. Moulder, W. F. Stickle, P. E. Sobol and K. D. Bomben, Handbook of X-ray Photoelectron Spectroscopy, p.114-115, p.180-181, Physical Electronics, Eden Pairie, MN,U.S.A (1995).
6 Z. Liu, L. Hong and S. W. Tay, Mater. Chem. Phys., 105, 222, (2007).   DOI   ScienceOn
7 B. R. Rauhe, F. R. Mclarnon and E. J. Cairns, J.Electrochem. Soc., 142, 1073 (1995).   DOI
8 A. Pozio, M. De Francesco, A. Cemmi, F. Cardellini and L. Giorgi, J. Power Sourc., 105,13 (2002).   DOI   ScienceOn
9 A. S. Arico, S. Srinivasan and V. Antonucci, Fuel Cells, 1,133 (2001).   DOI
10 S. Yoo, S. M. Kang, J. Lee, C. K. Rhee and H. Ryu, Kor.J. Mater. Res. 21(3). 180 (2011) (in Korean).   DOI   ScienceOn
11 M. Winter and R. J. Brodd, Chem. Rev., 104, 4245 (2004).   DOI   ScienceOn
12 H. -J. Ahn, H. -S. Shim, W. B. Kim, Y. E. Sung and T. -Y. Seong, J. Alloy. Comp., 471, L39 (2009).   DOI   ScienceOn
13 H. -J. Ahn, W. J. Moon, T. -Y. Seong and D. Wang, Electrochem. Comm., 11, 635 (2009).   DOI   ScienceOn
14 K. -W. Park and Y. -E. Sung, J. Ind. Eng. Chem., 12, 165 (2006).