In Situ Characterization of the 5d Density of States of Pt Nanoparticles upon Adsorption of CO

被引：106

作者：

Glatzel, Pieter ^{[1
]}

Singh, Jagdeep ^{[2
]}

Kvashnina, Kristina O. ^{[1
]}

van Bokhoven, Jeroen A. ^{[2
]}

机构：

[1] European Synchrotron Radiat Facil, F-38043 Grenoble 9, France

[2] ETH, Inst Chem & Bioengn, CH-8093 Zurich, Switzerland

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 08期

基金：

瑞士国家科学基金会;

关键词：

X-RAY-ABSORPTION; ENERGY-RESOLUTION FLUORESCENCE; CARBON-MONOXIDE; SPECTROSCOPY; OXYGEN; SCATTERING; CATALYSTS; SURFACES; SPECTRA; CLUSTERS;

D O I：

10.1021/ja907760p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An element-selective study of the occupied and unoccupied density of electronic states in Pt nanoparticles was performed using hard X-ray resonant inelastic X-ray scattering (RIXS). An opening In the valence d band is observed when CO is adsorbed. The gap originates from bonding and antibonding orbitals between Pt and CO. The adsorption of CO blocks sites and changes the electronic structure, thus Further passivating the catalytic activity of Pt. The experimental results are Supported by full Multiple scattering calculations.

引用

页码：2555 / +

页数：4

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