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Advanced Electrodes for Solid Acid Fuel Cells by Platinum Deposition on CsH_(2)PO_4

Papandrew, Alexander B. and Chisholm, Calum R. I. and Elgammal, Ramez A. and Özer, Mustafa M. and Zecevic, Strahinja K. (2011) Advanced Electrodes for Solid Acid Fuel Cells by Platinum Deposition on CsH_(2)PO_4. Chemistry of Materials, 23 (7). pp. 1659-1667. ISSN 0897-4756.

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We demonstrate cathodes for solid acid fuel cells fabricated by vapor deposition of platinum from the metalorganic precursor Pt(acac)_2 on the solid acid CsH_(2)PO_4 at 210 °C. A network of platinum nanoparticles with diameters of 2−4 nm serves as both the oxygen reduction catalyst and the electronic conductor in the electrode. Electrodes with a platinum content of 1.75 mg/cm^2 are more active for oxygen reduction than previously reported electrodes with a platinum content of 7.5 mg/cm^2. Electrodes containing <1.75 mg/cm^2 of platinum show significantly reduced catalytic activity and increased ohmic resistance indicative of a highly discontinuous catalytic-electronic platinum network.

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Additional Information:© 2011 American Chemical Society. Published In Issue April 12, 2011; Article ASAP: March 15, 2011; Received: April 23, 2010; Revised: January 11, 2011. The authors thank Mandy Abbott, Dane Boysen, Suk Yal Cha, Matt Hettermann, and Sossina Haile for technical assistance and helpful discussions. A.B.P. gratefully acknowledges the use of the Caltech GPS Analytical facility and the assistance of Chi Ma, and he also thanks Hanno H. Weitering for the use of his facilities for XPS measurements.
Subject Keywords:catalysis and catalysts; nanomaterials (nanoparticles, nanotubes, etc.); ionic conductors (including solid (inorganic) and polymer electrolytes
Issue or Number:7
Record Number:CaltechAUTHORS:20110421-100326234
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Official Citation:Advanced Electrodes for Solid Acid Fuel Cells by Platinum Deposition on CsH2PO4 Alexander B. Papandrew, Calum R.I. Chisholm, Ramez A. Elgammal, Mustafa M. zer, Strahinja K. Zecevic Chemistry of Materials 2011 23 (7), 1659-1667
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23409
Deposited By: Jason Perez
Deposited On:21 Apr 2011 20:15
Last Modified:03 Oct 2019 02:46

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