Scanning Photoelectron Microscopy Study of the Pt/Phosphoric-Acid-Imbibed Membrane Interface under Polarization

被引：23

作者：

Doh, Won H. ^{[1
]}

Gregoratti, Luca ^{[2
]}

Amati, Matteo ^{[2
]}

Zafeiratos, Spyridon ^{[1
]}

Law, Yeuk T. ^{[1
]}

Neophytides, Stylianos G. ^{[3
]}

Orfanidi, Alin ^{[3
]}

Kiskinova, Maya ^{[2
]}

Savinova, Elena R. ^{[1
]}

机构：

[1] CNRS UdS, UMR 7515, ICPEES, F-67087 Strasbourg, France

[2] Sincrotrone Trieste SCpA, ELETTRA, I-34012 Trieste, Italy

[3] Inst Chem Engn & High Temp Proc, Patras 26504, Greece

来源：

CHEMELECTROCHEM | 2014年 / 1卷 / 01期

关键词：

fuel cells; interfaces; membranes; phosphorus; photoelectron spectroscopy; FUEL-CELL ELECTROLYTES; KEY COMPONENTS; SPECTROSCOPY; IMPURITIES; MORPHOLOGY; SURFACE;

D O I：

10.1002/celc.201300134

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A model membrane-electrode assembly of a high-temperature polymer-exchange membrane fuel cell based on a phosphoric-acid-imbibed membrane is studied under polarization by using scanning photoelectron microscopy (SPEM). The ability of SPEM to simultaneously probe the morphology, surface composition, and chemical state of cell constituents provides essential information on processes relevant to fuel cells. Despite the low ambient pressure of 1 X 10(-5) mbar, by utilizing a dynamic high-pressure system, it is possible to monitor the Pt-catalyzed reduction of phosphoric acid with hydrogen and unveil the long-disputed nature of the ensuing products.

引用

页码：180 / 186

页数：7

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