Porous model type electrodes by induced dewetting of thin Pt films on YSZ substrates

被引：30

作者：

Baumann, Nils ^{[1
]}

Mutoro, Eva ^{[1
]}

Janek, Juergen ^{[1
]}

机构：

[1] Univ Giessen, Inst Phys Chem, D-35392 Giessen, Germany

来源：

SOLID STATE IONICS | 2010年 / 181卷 / 1-2期

关键词：

Dewetting; Exchange current density; Three phase boundary; Platinum; PLD; YSZ; YTTRIA-STABILIZED ZIRCONIA; PLATINUM-ELECTRODES; POLYMER-FILMS; SURFACE; DEGRADATION; MORPHOLOGY; INTERFACE; MICROSTRUCTURE; SEGREGATION; DYNAMICS;

D O I：

10.1016/j.ssi.2009.11.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thin Platinum films, prepared by Pulsed Laser Deposition (PLD) on single-crystalline yttria-stabilized zirconia (YSZ), show microstructurally uncontrolled dewetting upon heating to elevated temperatures. We tested several methods to induce the dewetting process, yielding a regular pattern - including structuring by masking of the surface with a Pt net and pre-coating of the YSZ surface with different substances. Electrochemical measurements prove that these electrodes show a higher exchange current density compared to untreated, fully covering Pt YSZ systems and are morphologically stable upon electrochemical polarization and heating. Thin films structured by induced dewetting at high temperature may become useful tools as model type electrodes for surface analytical studies of electrode reactions at lower temperatures than their dewetting treatment. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：7 / 15

页数：9

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