CO-Assisted Subsurface Hydrogen Trapping in Pd(111) Films

被引：16

作者：

Cerda, J. I. ^{[1
]}

Santos, B. ^{[2
]}

Herranz, T. ^{[2
]}

Puerta, J. M. ^{[1
]}

de la Figuera, J. ^{[2
]}

McCarty, K. F. ^{[3
]}

机构：

[1] CSIC, Inst Ciencia Mat, Madrid 28049, Spain

[2] CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, Spain

[3] Sandia Natl Labs, Livermore, CA 94550 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2012年 / 3卷 / 01期

关键词：

CARBON-MONOXIDE; ELECTRON; METHANOL; SURFACE; DECOMPOSITION; NANOPARTICLES; COADSORPTION; DISSOLUTION; CHEMISTRY; GAS;

D O I：

10.1021/jz201455s

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：

We use low-energy electron microscopy to image CO displacing adsorbed H from the Pd(111) surface. Quantitative electron diffraction reveals that upon codosing atomic H and CO the latter assists the absorption of hydrogen, which ends up trapped between the first and second palladium layers, and blocks its desorption. Density functional calculations reproduce, this effect, which is found to originate from the antibonding character of the interaction between the adsorbed hydrogen and the CO pi states.

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页码：87 / 91

页数：5

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