In situ investigation of dissociation and migration phenomena at the Pt/electrolyte interface of an electrochemical cell

被引：35

作者：

Law, Yeuk Ting ^{[1
]}

Zafeiratos, Spyridon ^{[1
]}

Neophytides, Stylianos G. ^{[2
]}

Orfanidi, Alin ^{[2
]}

Costa, Dominique ^{[3
]}

Dintzer, Thierry ^{[1
]}

Arrigo, Rosa ^{[4
,5
]}

Knop-Gericke, Axel ^{[4
]}

Schloegld, Robert ^{[4
,5
]}

Savinova, Elena R. ^{[1
]}

机构：

[1] UMR 7515 CNRS UdS ECPM, Inst Chim & Proc Energie Environm & Sante, F-67087 Strasbourg, France

[2] Inst Chem Engn Sci, GR-26504 Patras, Greece

[3] CHIMIE PARISTECH, ENSCP, Lab Physicochim Surfaces, F-75005 Paris, France

[4] MPG, Fritz Haber Inst, D-14195 Berlin, Germany

[5] Max Planck Inst Chem Energy Convers, D-45470 Mulheim, Germany

来源：

CHEMICAL SCIENCE | 2015年 / 6卷 / 10期

关键词：

RAY PHOTOELECTRON-SPECTROSCOPY; ULTRASOFT PSEUDOPOTENTIALS; ADSORPTION; PLATINUM; HYDROGEN; LIQUID; MEMBRANE; CORE; XPS;

D O I：

10.1039/c5sc01421b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The development of efficient energy conversion systems requires precise engineering of electrochemical interfaces and thus asks for in situ techniques to probe the structure and the composition of the dynamic electrode/electrolyte interfacial region. This work demonstrates the potential of the near ambient pressure X-ray photoelectron spectroscopy (NAPXPS) for in situ studies of processes occurring at the interface between a metal electrode and a liquid electrolyte. By using a model membrane-electrode assembly of a high temperature phosphoric acid-imbibed proton exchange membrane fuel cell, and combining NAPXPS measurements with the density functional theory, it was possible to monitor such fundamental processes as dissociation and migration of the phosphoric acid within a nanostructured Pt electrode under polarization.

引用

页码：5635 / 5642

页数：8

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