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Effect of ceria nanoparticles into the Pt/C catalyst as cathode material on the electrocatalytic activity and durability for low-temperature fuel cell

Cited 70 time in Web of Science Cited 70 time in Scopus
Authors
Lim, Dong-Ha; Lee, Weon-Doo; Choi, Dong-Hyeok; Lee, Ho-In
Issue Date
2010
Publisher
Elsevier
Citation
Applied Catalysis B: Environmental 94 (2010) 85–96
Keywords
Continuous two-step processNano-sized metal oxidePt–CeO2/C electrocatalystOxygen reduction reactionAccelerated durabilityLow-temperature fuel cell
Abstract
An effective method is developed for preparing highly dispersed CeO2 nanoparticles on a Pt/C catalyst
synthesized by a continuous two-step process as a cathode material in low-temperature fuel cell. The
XRD patterns of the 20Pt–10CeO2/C catalyst reveal that both crystalline Pt and CeO2 phases coexist. The
HR-TEM images show that Pt and CeO2 nanoparticles have average particle sizes of approximately
3.4 nm and 4.2 nm, respectively, with quite a narrow distribution between 3 nm and 5 nm. Based on the
analysis of the polarization curves for the ORR, the optimum proportion of CeO2 into the 20Pt/C catalyst
is 10 wt%. In the ORR and single cell tests, the 20Pt–10CeO2/C catalyst shows higher performance than
the commercial 20Pt/C catalyst, owing to the oxygen storage capacity of CeO2 and its ability to exchange
oxygen rapidly with oxygen in the buffer. In the accelerated stability tests, the 20Pt–10CeO2/C catalyst
has a better durability compared to the commercial 20Pt/C catalyst due to the existence of CeO2, which
prevents the agglomeration and dissolution of Pt nanoparticles on the carbon support, extending the life
of the catalyst.
ISSN
0926-3373
Language
English
URI
https://hdl.handle.net/10371/61275
DOI
https://doi.org/10.1016/j.apcatb.2009.10.024
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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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