In situ time-resolved dynamic surface events on the Pt/C cathode in a fuel cell under operando conditions

被引：131

作者：

Tada, Mizuki

Murata, Shigeaki

Asakoka, Takahiko

Hiroshima, Kazutaka

Okumura, Kazu

Tanida, Hajime

Uruga, Tomoya

Nakanishi, Haruyuki

Matsumoto, Shin-ichi

Inada, Yasuhiro

Nomura, Masaharu

Iwasawa, Yasuhiro ^{[1
]}

机构：

[1] Univ Tokyo, Dept Chem, Grad Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan

[2] Toyota Motor Co Ltd, Fuel Cell Syst Dev Ctr, Shizuoka 4101193, Japan

[3] Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan

[4] Tottori Univ, Fac Engn, Dept Mat Sci, Tottori 6808552, Japan

[5] Japan Synchrotron Radiat Res Inst Kouto, Sayo, Hyogo 6795198, Japan

[6] High Energy Accelerator Res Org, Photon Factory, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2007年 / 46卷 / 23期

关键词：

electrochemistry; fuel cells; kinetics; reaction mechanisms; XAFS spectroscopy;

D O I：

10.1002/anie.200604732

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

(Figure Presented) On the Pt/C cathode in a fuel cell, dynamic surface events were investigated by novel X-ray absorption techniques (see Fourier transform for the oxidation process, 0.4→1.0 V). Evidence for Pt dissolution at the cathode was found, and the reaction kinetics of the electron-transfer processes, as well as redox structural changes and a significant time lag between the events, were observed for the first time under operando conditions. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA.

引用

页码：4310 / 4315

页数：6

共 25 条

[1] DIRECT OBSERVATION OF SURFACE OXIDE FORMATION AND REDUCTION ON PLATINUM CLUSTERS BY TIME-RESOLVED X-RAY-ABSORPTION SPECTROSCOPY [J].