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Title:
ELECTRODE CATALYST, COMPOSITION FOR GAS DIFFUSION ELECTRODE FORMATION, GAS DIFFUSION ELECTRODE, MEMBRANE-ELECTRODE ASSEMBLY, AND FUEL BATTERY STACK
Document Type and Number:
Japanese Patent JP2015195210
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an electrode catalyst which can exhibit an adequate performance even if it includes a relatively high density of chlorine, and is suitable for mass production, and adequate for manufacturing cost cutting.SOLUTION: An electrode catalyst 1 having a core-shell structure comprises: a carrier 2; a core part 4 formed on the carrier 2; and a shell part 5 formed to cover at least part of the surface of the core part 4. The ratios of physical amounts (numbers of atoms) of bromine (X) and chlorine (X) calculated based on contents of bromine (Br) species and chlorine (Cl) measured according to fluorescent X-ray (XRF) spectroscopy to a physical amount (the number of atoms) (M) of a metal element making a constituent of the shell part 5, which is calculated by use of an electrochemical superficial area (ECSA) based on hydrogen desorption waves obtained by cyclic voltammetry satisfy the conditions given by the following expressions (1) and (2): (X/M)≤1.2 (1); and (X/M)≤17.0 (2).

Inventors:
NAGAMORI KIYOTAKA
MIZUSAKI TOMOTERU
NAKAMURA YOKO
TSUBAKI TAKUYA
IGARASHI HIROSHI
SEKI YASUHIRO
Application Number:
JP2015067730A
Publication Date:
November 05, 2015
Filing Date:
March 27, 2015
Export Citation:
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Assignee:
NE CHEMCAT CORP
International Classes:
H01M4/90; H01M4/86; H01M4/92; H01M8/02
Domestic Patent References:
JP2010214330A2010-09-30
JP2011218278A2011-11-04
JP2008126211A2008-06-05
JP2008511534A2008-04-17
JP2002249488A2002-09-06
Foreign References:
WO2011115012A12011-09-22
WO2014181873A12014-11-13
Attorney, Agent or Firm:
矢野 卓哉
牛木 護