Atomic and Electronic Structure of V-Rh(110) Near-Surface Alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10192062" target="_blank" >RIV/00216208:11320/13:10192062 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/13:00433048

Výsledek na webu

<a href="http://dx.doi.org/10.1021/jp402985v" target="_blank" >http://dx.doi.org/10.1021/jp402985v</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jp402985v" target="_blank" >10.1021/jp402985v</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Atomic and Electronic Structure of V-Rh(110) Near-Surface Alloy

Popis výsledku v původním jazyce

Vanadia-promoted Rh catalysts and Rh-V alloys have shown enhanced reactivity in several heterogeneous catalytic processes. However, little is known about the role of electronic and geometrical effects of the alloy phase on the chemical reactivity. In this article, we present experimental study on geometric and electronic structure of near-surface ordered alloys prepared by depositing V on Rh(110) surface and by subsequent annealing. STM, LEED, and XPD measurements were combined to determine the atomic structure. The electronic influence of the subsurface vanadium on the Rh(110) surface was elucidated by means of core-level and angle-resolved valence band photoemission spectroscopy. The influence of the alloying on the interaction with gas molecules wasprobed by CO adsorption. It was found that annealing at 973 K results in a (2 x 1) surface reconstruction of Rh surface atoms along [110] rows induced by subsurface vanadium. Annealing at higher temperatures induces diffusion of vanadium

Název v anglickém jazyce

Atomic and Electronic Structure of V-Rh(110) Near-Surface Alloy

Popis výsledku anglicky

Vanadia-promoted Rh catalysts and Rh-V alloys have shown enhanced reactivity in several heterogeneous catalytic processes. However, little is known about the role of electronic and geometrical effects of the alloy phase on the chemical reactivity. In this article, we present experimental study on geometric and electronic structure of near-surface ordered alloys prepared by depositing V on Rh(110) surface and by subsequent annealing. STM, LEED, and XPD measurements were combined to determine the atomic structure. The electronic influence of the subsurface vanadium on the Rh(110) surface was elucidated by means of core-level and angle-resolved valence band photoemission spectroscopy. The influence of the alloying on the interaction with gas molecules wasprobed by CO adsorption. It was found that annealing at 973 K results in a (2 x 1) surface reconstruction of Rh surface atoms along [110] rows induced by subsurface vanadium. Annealing at higher temperatures induces diffusion of vanadium

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

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Svazek periodika

117

Číslo periodika v rámci svazku

24

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

12679-12688

Kód UT WoS článku

000320911100031

EID výsledku v databázi Scopus

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