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Development of nanophase CeO2-Pt/C cathode catalyst for direct methanol fuel cell

Cited 98 time in Web of Science Cited 100 time in Scopus
Authors
Yu, Hwan Bae; Kim, Joon-Hee; Lee, Ho-In; Scibioh, M. Aulice; Lee, Jaeyoung; Han, Jonghee; Yoon, Sung Pil; Ha, Heung Yong
Issue Date
2005-01
Publisher
Elsevier
Citation
Journal of Power Sources 140 (2005) 59–65
Keywords
Air utilizationCathode catalystCeO2Direct methanol fuel cellOxygen storage materialMEA
Abstract
Incorporation of nanophase ceria (CeO2) into the cathode catalyst Pt/C increased the local oxygen concentration in an air atmosphere,
leading to enhanced single-cell performance of direct methanol fuel cell (DMFC). Ceria doped catalysts were effective at low oxygen partial
pressure (≤0.6 atm) conditions and 1 wt.% CeO2 doped Pt/C exhibited the highest performance. The effect of ceria was more prominent with
air as the cathode reactant and the ceria acted as a mere impurity in a pure oxygen atmosphere, decreasing the DMFC performance. Impedance
spectra showed a decrease in polarization resistance with the ceria addition to the cathode catalyst in low-potential regions confirming the
facile mass transfer of the reactant oxygen molecules to catalytic sites. Transmission electron microscopy (TEM) pictures showed a uniform
distribution of CeO2 around platinum sites.
ISSN
0378-7753
Language
English
URI
https://hdl.handle.net/10371/61790
DOI
https://doi.org/10.1016/j.jpowsour.2004.08.015
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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