Polarization effects on the surface chemistry of PbTiO3-supported Pt films

被引：93

作者：

Kolpak, Alexie M. ^{[1
]}

Grinberg, Ilya ^{[1
]}

Rappe, Andrew M. ^{[1
]}

机构：

[1] Univ Penn, Dept Chem, Makineni Theoret Labs, Philadelphia, PA 19104 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.98.166101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

To demonstrate a new paradigm of dynamical control of surface structure and reactivity, we perform density functional theory calculations of the adsorption of several molecules and atoms to the surface of ultrathin Pt(100) films supported on ferroelectric PbTiO3. We show that reorienting the polarization direction of the substrate can dramatically change the chemisorption energies of CO, O, C, and N and alter the reaction pathways for dissociation of CO, O-2, N-2, and NO. We discuss the structural and electronic effects of a polarized substrate on the metal surface, and we suggest potential applications in tunable catalysis.

引用

页数：4

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