Carbon-supported catalyst with varying atomic ratio of Pt to Ti, namely, 1:1, 2:1, and 3:1, is prepared by sol-gel method and its electrocatalytic activity toward oxygen-reduction reaction (ORR) is evaluated for the application in polymer electrolyte fuel cells (PEFCs). The optimum atomic ratio of Pt to Ti in and annealing temperature are established by cyclic voltammetry and fuel-cell-polarization studies. annealed at with Pt and Ti in atomic ratio of 2:1, namely, (2:1), shows enhanced electrocatalytic activity toward ORR. It is found that the incorporation of with Pt ameliorates both electrocatalytic activity and stability of cathode in relation to pristine Pt cathode, currently being used in PEFCs. A power density of is achieved at 0.6 V for the PEFC with (2:1) as compared with at 0.6 V achieved with the PEFC comprising Pt/C as cathode catalyst while operating under identical conditions. Interestingly, carbon-supported cathode exhibits only 6% loss in electrochemical surface area after 5000 potential cycles while it is as high as 25% for Pt/C.
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e-mail: selvarani80@gmail.com
e-mail: mahes.suma@gmail.com
e-mail: psridhar55@gmail.com
e-mail: spmanicecri@gmail.com
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April 2011
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
A PEFC With as Oxygen-Reduction Catalyst
G. Selvarani,
e-mail: selvarani80@gmail.com
G. Selvarani
CSIR-Central Electrochemical Research Institute
, CECRI-Madras Unit, CSIR Complex, Taramani, Chennai 600 113, India
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S. Maheswari,
e-mail: mahes.suma@gmail.com
S. Maheswari
CSIR-Central Electrochemical Research Institute
, CECRI-Madras Unit, CSIR Complex, Taramani, Chennai 600 113, India
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P. Sridhar,
e-mail: psridhar55@gmail.com
P. Sridhar
CSIR-Central Electrochemical Research Institute
, CECRI-Madras Unit, CSIR Complex, Taramani, Chennai 600 113, India
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S. Pitchumani,
e-mail: spmanicecri@gmail.com
S. Pitchumani
CSIR-Central Electrochemical Research Institute
, CECRI-Madras Unit, CSIR Complex, Taramani, Chennai 600 113, India
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A. K. Shukla
A. K. Shukla
Solid State and Structural Chemistry Unit,
e-mail: akshukla2006@gmail.com
Indian Institute of Science
, Bangalore 560 012, India
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G. Selvarani
CSIR-Central Electrochemical Research Institute
, CECRI-Madras Unit, CSIR Complex, Taramani, Chennai 600 113, Indiae-mail: selvarani80@gmail.com
S. Maheswari
CSIR-Central Electrochemical Research Institute
, CECRI-Madras Unit, CSIR Complex, Taramani, Chennai 600 113, Indiae-mail: mahes.suma@gmail.com
P. Sridhar
CSIR-Central Electrochemical Research Institute
, CECRI-Madras Unit, CSIR Complex, Taramani, Chennai 600 113, Indiae-mail: psridhar55@gmail.com
S. Pitchumani
CSIR-Central Electrochemical Research Institute
, CECRI-Madras Unit, CSIR Complex, Taramani, Chennai 600 113, Indiae-mail: spmanicecri@gmail.com
A. K. Shukla
Solid State and Structural Chemistry Unit,
Indian Institute of Science
, Bangalore 560 012, Indiae-mail: akshukla2006@gmail.com
J. Fuel Cell Sci. Technol. Apr 2011, 8(2): 021003 (8 pages)
Published Online: November 24, 2010
Article history
Received:
March 15, 2010
Revised:
July 16, 2010
Online:
November 24, 2010
Published:
November 24, 2010
Citation
Selvarani, G., Maheswari, S., Sridhar, P., Pitchumani, S., and Shukla, A. K. (November 24, 2010). "A PEFC With as Oxygen-Reduction Catalyst." ASME. J. Fuel Cell Sci. Technol. April 2011; 8(2): 021003. https://doi.org/10.1115/1.4002466
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