Optical second harmonic generation during the electrocatalytic oxidation of formaldehyde on Pt(111): Potentiostatic regime versus galvanostatic potential oscillations

被引：17

作者：

Mishina, E ^{[1
]}

Karantonis, A

Yu, QK

Nakabayashi, S

机构：

[1] Saitama Univ, Dept Chem, Fac Sci, Urawa, Saitama 3388570, Japan

[2] Moscow Inst Radio Engn Elect & Automat, Moscow 117454, Russia

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2002年 / 106卷 / 39期

关键词：

D O I：

10.1021/jp026146x

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：

The electrocatalytic oxidation of formaldehyde on Pt(111) under potentiostatic conditions and periodic potential oscillations was studied by using optical second harmonic generation (SHG). Under potentiostatic conditions, order-disorder and order-order phase transitions were observed. Under galvanostatic conditions, oscillations of the SHG field occurred, corresponding to the potential oscillations. However, in the dynamic regime only the evidence of a structural order-disorder phase transition is present in SHG data, This might be due to a much higher time constant of the surface ordering in comparison to the oscillation period.

引用

页码：10199 / 10204

页数：6

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