Mechanism of Electron-Induced Hydrogen Desorption from Hydroxylated Rutile TiO2 (110)

被引：26

作者：

Acharya, D. P. ^{[1
]}

Ciobanu, C. V. ^{[2
]}

Camillone, N., III ^{[3
]}

Sutter, P. ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[2] Colorado Sch Mines, Div Engn, Golden, CO 80401 USA

[3] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 49期

关键词：

FIELD; TIO2(110); SURFACES; WATER; STM; DISSOCIATION; MANIPULATION; ADSORPTION; DIFFUSION; SCALE;

D O I：

10.1021/jp107262b

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：

The mechanism of hydrogen desorption from rutile TiO2(110)-(1 x 1) was studied by injecting electrons with controlled energy and flux into single surface hydroxyls (OH) in cryogenic scanning tunneling microscopy (STM). Desorption proceeds without a clear threshold already at much lower energies than reported previously.(1) Our analysis identifies a transfer of H atoms from the TiO2 surface to the STM tip, triggered by vibrational heating due to inelastic electron tunneling, as the desorption mechanism. The reversible H-atom transfer between sample and tip can be used as a tool to discriminate OH from other surface species on TiO2 and to control the density and configuration of OH by selective removal and redeposition of H atoms on the oxide surface.

引用

页码：21510 / 21515

页数：6

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