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Mapping Platinum Species in Polymer Electrolyte Fuel Cells by Spatially Resolved XAFS Techniques
Author(s) -
Takao Shinobu,
Sekizawa Oki,
Nagamatsu Shinichi,
Kaneko Takuma,
Yamamoto Takashi,
Samjeské Gabor,
Higashi Kotaro,
Nagasawa Kensaku,
Tsuji Takuya,
Suzuki Motohiro,
Kawamura Naomi,
Mizumaki Masaichiro,
Uruga Tomoya,
Iwasawa Yasuhiro
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201408845
Subject(s) - x ray absorption fine structure , cathode , platinum , leaching (pedology) , electrolyte , catalysis , dissolution , polymer , chemical engineering , materials science , platinum nanoparticles , inorganic chemistry , chemistry , electrode , composite material , organic chemistry , spectroscopy , physics , environmental science , quantum mechanics , soil science , engineering , soil water
Abstract There is limited information on the mechanism for platinum oxidation and dissolution in Pt/C cathode catalyst layers of polymer electrolyte fuel cells (PEFCs) under the operating conditions though these issues should be uncovered for the development of next‐generation PEFCs. Pt species in Pt/C cathode catalyst layers are mapped by a XAFS (X‐ray absorption fine structure) method and by a quick‐XAFS(QXAFS) method. Information on the site‐preferential oxidation and leaching of Pt cathode nanoparticles around the cathode boundary and the micro‐crack in degraded PEFCs is provided, which is relevant to the origin and mechanism of PEFC degradation.