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.
| Original language | English |
|---|---|
| Pages (from-to) | 59-65 |
| Number of pages | 7 |
| Journal | Journal of Power Sources |
| Volume | 140 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2005 Jan 1 |
| Externally published | Yes |
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Keywords
- Air utilization
- Cathode catalyst
- Ceo
- Direct methanol fuel cell
- MEA
- Oxygen storage material
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
Cite this
Development of nanophase CeO2-Pt/C cathode catalyst for direct methanol fuel cell. / Yu, Hwan Bae; Kim, Joon Hee; Lee, Ho In; Scibioh, M. Aulice; Lee, Jaeyoung; Han, Jonghee; Yoon, Sung Pil; Ha, Heung Yong.
In: Journal of Power Sources, Vol. 140, No. 1, 01.01.2005, p. 59-65.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Development of nanophase CeO2-Pt/C cathode catalyst for direct methanol fuel cell
AU - Yu, Hwan Bae
AU - Kim, Joon Hee
AU - Lee, Ho In
AU - Scibioh, M. Aulice
AU - Lee, Jaeyoung
AU - Han, Jonghee
AU - Yoon, Sung Pil
AU - Ha, Heung Yong
PY - 2005/1/1
Y1 - 2005/1/1
N2 - 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.
AB - 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.
KW - Air utilization
KW - Cathode catalyst
KW - Ceo
KW - Direct methanol fuel cell
KW - MEA
KW - Oxygen storage material
UR - http://www.scopus.com/inward/record.url?scp=10644229958&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=10644229958&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2004.08.015
DO - 10.1016/j.jpowsour.2004.08.015
M3 - Article
AN - SCOPUS:10644229958
VL - 140
SP - 59
EP - 65
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 1
ER -