The structure of RuO2(110) and the mechanism for catalytic carbon monoxide oxidation on this surface were studied by Low-energy electron diffraction, scanning tunneling microscopy, and density-functional calculations. The RuO2(110) surface exposes bridging oxygen atoms and ruthenium atoms not capped by oxygen, The Latter act as coordinatively unsaturated sites-a hypothesis introduced Long ago to account for the catalytic activity of oxide surfaces-onto which carbon monoxide can chemisorb and from where it can react with neighboring Lattice-oxygen to carbon dioxide, Under steady-state conditions, the consumed Lattice-oxygen is continuously restored by oxygen uptake from the gas phase. The results provide atomic-scale verification of a general mechanism originally proposed by Mars and van Krevelen in 1954 and are likely to be of general relevance for the mechanism of catalytic reactions at oxide surfaces.

Atomic-scale structure and catalytic reactivity of the RuO2 (110) surface

MORGANTE, ALBERTO;
2000-01-01

Abstract

The structure of RuO2(110) and the mechanism for catalytic carbon monoxide oxidation on this surface were studied by Low-energy electron diffraction, scanning tunneling microscopy, and density-functional calculations. The RuO2(110) surface exposes bridging oxygen atoms and ruthenium atoms not capped by oxygen, The Latter act as coordinatively unsaturated sites-a hypothesis introduced Long ago to account for the catalytic activity of oxide surfaces-onto which carbon monoxide can chemisorb and from where it can react with neighboring Lattice-oxygen to carbon dioxide, Under steady-state conditions, the consumed Lattice-oxygen is continuously restored by oxygen uptake from the gas phase. The results provide atomic-scale verification of a general mechanism originally proposed by Mars and van Krevelen in 1954 and are likely to be of general relevance for the mechanism of catalytic reactions at oxide surfaces.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/1697073
 Avviso

Registrazione in corso di verifica.
La registrazione di questo prodotto non è ancora stata validata in ArTS.

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 846
  • ???jsp.display-item.citation.isi??? 822
social impact