Catalyst for solid polymer fuel cells and method for manufacturing the same
AssigneeTanaka Kikinzoku Kogyo K.K.
InventorsTakeshi Kaieda, Koichi Matsutani
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Abstract
The present invention relates to a catalyst for solid polymer fuel cells in which catalyst particles including platinum or platinum alloy are supported on a carbon powder carrier. The catalyst of the present invention is a catalyst for solid polymer fuel cells in which the bond energy (Ec) at a gravity center position is 2.90 eV or more and 3.85 eV or less as calculated from a spectrum area of a Pt5d orbit-derived spectrum which is obtained by measuring a valence band spectrum in a range of 0 eV or more and 20 eV or less in the result of subjecting the catalyst particles to X-ray photoelectron spectroscopic analysis.
Claims14
A catalyst for solid polymer fuel cells in which catalyst particles consisting of platinum or a single phase platinum alloy are supported on a carbon powder carrier, wherein
- a bond energy (Ec) at a gravity center position is 2.90 eV or more and 3.85 eV or less as calculated from a spectrum area of a Pt5d orbit-derived spectrum which is obtained by subjecting the catalyst particles to X-ray photoelectron spectroscopic analysis to measure a valence band spectrum in a range of 0 eV or more and 20 eV or less wherein the X-ray photoelectron spectroscopic analysis uses a monochromatized Al-KαX-ray source.
Dependencies are inferred from the claim text.