@article{64b6063fad9a4fbaa7a9277b1f624bd4,
title = "Operando XAFS Imaging of Distribution of Pt Cathode Catalysts in PEFC MEA",
abstract = "Three-dimensional imaging using X-ray as a probe is state-of-the-art for the characterization of heterogeneous materials. In addition to simple imaging of sample morphology, imaging of elemental distribution and chemical states provides advanced maps of key structural parameters of functional materials. The combination of X-ray absorption fine structure (XAFS) spectroscopy and three-dimensional imaging such as computed tomography (CT) can visualize the three-dimensional distribution of target elements, their valence states, and local structures in a non-destructive manner. In this personal account, our recent results on the three-dimensional XAFS imaging for Pt cathode catalysts in the membrane electrode assembly (MEA) of polymer electrolyte fuel cell (PEFC) are introduced. The distribution and chemical states of Pt cathode catalysts in MEAs remarkably change under PEFC operating conditions, and the 3D XAFS imaging revealed essential events in PEFC MEAs.",
keywords = "Catalyst, Laminography, Operando analysis, PEFC, Tomography",
author = "Hirosuke Matsui and Naoyuki Maejima and Nozomu Ishiguro and Yuanyuan Tan and Tomoya Uruga and Oki Sekizawa and Tomohiro Sakata and Mizuki Tada",
note = "Funding Information: This work was supported in part by the NEDO program, the Kao Science Foundation, a JSPS KAKENHI Grant-in-Aid for Scientific Research (B) (26288005 and 18H01940), and JSPS KAKENHI Grant-in-Aid for Young Scientists (B) (16K18288). We thank Prof. Y. Iwasawa (Univ. Electro-Commun.) and Prof. M. Takata (RIKEN/Tohoku Univ.) for their helpful discussion. XAFS measurements were performed with the approval of SPring-8 No. 2011 A1537 (BL47XU), No. 2011 B1015 (BL01B1), and Nos. 2013 B7822, 2014 A7821, 2014 B7821, 2015 A7821, 2015B7821, 2016 A7821, 2016 A7822, 2016 B7821, 2016 B7822, 2017 A7820, 2017 B7820. SEM was measured at High Voltage Electron Microscope Laboratory, Institute of Materials and Systems for Sustainability, Nagoya University, supported by “Advanced Characterization Nanotechnology Platform” of MEXT, Japan. Funding Information: This work was supported in part by the NEDO program, the Kao Science Foundation, a JSPS KAKENHI Grant-in-Aid for Scientific Research (B) (26288005 and 18H01940), and JSPS KAKENHI Grant-in-Aid for Young Scientists (B) (16K18288). We thank Prof. Y. Iwasawa (Univ. Electro-Commun.) and Prof. M. Takata (RIKEN/Tohoku Univ.) for their helpful discussion. XAFS measurements were performed with the approval of SPring-8 No. 2011 A1537 (BL47XU), No. 2011 B1015 (BL01B1), and Nos. 2013 B7822, 2014 A7821, 2014 B7821, 2015 A7821, 2015B7821, 2016 A7821, 2016 A7822, 2016 B7821, 2016 B7822, 2017 A7820, 2017 B7820. SEM was measured at High Voltage Electron Microscope Laboratory, Institute of Materials and Systems for Sustainability, Nagoya University, supported by ?Advanced Characterization Nanotechnology Platform? of MEXT, Japan. Publisher Copyright: {\textcopyright} 2019 The Chemical Society of Japan & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2019",
month = jul,
doi = "10.1002/tcr.201800123",
language = "English",
volume = "19",
pages = "1380--1392",
journal = "Chemical Record",
issn = "1527-8999",
publisher = "John Wiley and Sons Inc.",
number = "7",
}