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

被引：103

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

共 26 条

[1] ALNOT M, 1982, SURF SCI, V114, pL48
[2] Effect of hydrogen adsorption on the x-ray absorption spectra of small Pt clusters
Ankudinov, AL
Rehr, JJ
Low, J
Bare, SR
[J]. PHYSICAL REVIEW LETTERS, 2001, 86 (08) : 1642 - 1645
[3] Real-space multiple-scattering calculation and interpretation of x-ray-absorption near-edge structure
Ankudinov, AL
Ravel, B
Rehr, JJ
Conradson, SD
[J]. PHYSICAL REVIEW B, 1998, 58 (12): : 7565 - 7576
[4] Coadsorption of nitric oxide and oxygen on the Ag(110) surface
Bao, X
Wild, U
Muhler, M
Pettinger, B
Schlögl, R
Ertl, G
[J]. SURFACE SCIENCE, 1999, 425 (2-3) : 224 - 232
[5] The Bronsted-Evans-Polanyi relation and the volcano curve in heterogeneous catalysis
Bligaard, T
Norskov, JK
Dahl, S
Matthiesen, J
Christensen, CH
Sehested, J
[J]. JOURNAL OF CATALYSIS, 2004, 224 (01) : 206 - 217
[6] MOLECULAR ORBITAL VIEW OF CHEMISORBED CARBON MONOXIDE
BLYHOLDER, G
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1964, 68 (10) : 2772 - &
[7] Influence of CO poisoning on hydrogen chemisorption onto a Pt6 cluster
Chen, Liang
Chen, Bei
Zhou, Chenggang
Wu, Jinping
Forrey, Robert C.
Cheng, Hansong
[J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (36) : 13937 - 13942
[8] PHOTOEMISSION SPECTRA OF ADSORBED LAYERS ON PD SURFACES
CONRAD, H
ERTL, G
KUPPERS, J
LATTA, EE
[J]. FARADAY DISCUSSIONS, 1974, 58 : 116 - 124
[9] de Groot F, 2008, ADV CONDENS MAT SCI, V6, P1
[10] Ertl G., 2008, Handbook of Heterogeneous Catalysis, V8

← 1 2 3 →