TY - GEN
T1 - Growth characteristics of self-assembled mesoporous nanospheres of platinum and platinum-ruthenium
AU - Knutson, Trevor L.
AU - Haglund, Kimberly A.
AU - Smyrl, William H.
PY - 2005
Y1 - 2005
N2 - Self assembled spheres of both Pt and Pt/Ru have been electrodeposited in a matrix of carbon black on a gold electrode, The spheres are roughly 200nm in diameter and have a high degree of surface porosity. As a fuel cell catalyst, the activity of the Pt/Ru toward methanol oxidation is the primary indication of performance. Catalysts deposited in the current limiting regime (i.e. low metal ion concentrations or more negative deposition potentials) show markedly higher oxidation current at 4.8-5.5mA as measured at +0.2V vs. saturated calomel electrode. Pt only deposits were also made and show identical morphology to Pt/Ru deposits. Surface area analysis of the Pt deposits correlate well with the oxidation activity of the Pt/Ru deposits, at similar deposition conditions. The maximum specific surface area measured for Pt, based on 100% coulombic efficiency, was about 35m2/g.
AB - Self assembled spheres of both Pt and Pt/Ru have been electrodeposited in a matrix of carbon black on a gold electrode, The spheres are roughly 200nm in diameter and have a high degree of surface porosity. As a fuel cell catalyst, the activity of the Pt/Ru toward methanol oxidation is the primary indication of performance. Catalysts deposited in the current limiting regime (i.e. low metal ion concentrations or more negative deposition potentials) show markedly higher oxidation current at 4.8-5.5mA as measured at +0.2V vs. saturated calomel electrode. Pt only deposits were also made and show identical morphology to Pt/Ru deposits. Surface area analysis of the Pt deposits correlate well with the oxidation activity of the Pt/Ru deposits, at similar deposition conditions. The maximum specific surface area measured for Pt, based on 100% coulombic efficiency, was about 35m2/g.
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U2 - 10.1557/proc-876-r12.7
DO - 10.1557/proc-876-r12.7
M3 - Conference contribution
AN - SCOPUS:34249977865
SN - 1558998306
SN - 9781558998308
T3 - Materials Research Society Symposium Proceedings
SP - 298
EP - 303
BT - Nanoporous and Nanostructured Materials for Catalysis, Sensor, and Gas Separation Applications
PB - Materials Research Society
T2 - 2005 MRS Spring Meeting
Y2 - 28 March 2005 through 1 April 2005
ER -
