Peroxide-like intermediate observed at hydrogen rich condition on Pt(111) after interaction with oxygen

被引：16

作者：

MacNaughton, Janay B. ^{[1
]}

Naslund, Lars-Ake ^{[1
]}

Anniyev, Toyli ^{[1
]}

Ogasawara, Hirohito ^{[1
]}

Nilsson, Anders ^{[1
]}

机构：

[1] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2010年 / 12卷 / 21期

基金：

加拿大自然科学与工程研究理事会;

关键词：

CORE-LEVEL SPECTROSCOPY; MEMBRANE DEGRADATION; REDUCTION REACTION; FUEL-CELLS; SURFACE; WATER; ACID; O-2; DURABILITY; ADSORPTION;

D O I：

10.1039/b926409b

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：

Hydrogen peroxide has been found to form as a byproduct during fuel cell operation, which is linked to the degradation of the ion exchange membrane resulting in a shorter lifetime of the fuel cell. Using O 1s X-ray photoelectron spectroscopy and X-ray absorption spectroscopy we investigated the molecular oxygen adsorption on hydrogenated Pt(111) and found that adsorbed hydrogen promotes the formation of a hydrogen peroxide-like intermediate. Polarization dependent X-ray absorption spectroscopy reveals that the O-O molecular axis is close to parallel and the OH group is perpendicular to the surface.

引用

页码：5712 / 5716

页数：5

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