Title

Selective oxidation of ammonia on RuO2(110) A combined DFT and KMC study

Authors

Authors

S. Hong; A. Karim; T. S. Rahman; K. Jacobi;G. Ertl

Comments

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Abbreviated Journal Title

J. Catal.

Keywords

Ruthenium; Oxide; Ammonia; Oxidation; Kinetic Monte Carlo; Density; functional theory; Catalysis; Selectivity; ROOM-TEMPERATURE; CO OXIDATION; SURFACE; MECHANISM; PRESSURE; KINETICS; POINTS; Chemistry, Physical; Engineering, Chemical

Abstract

We have used a combination of density functional theory (OFT) and kinetic Monte Carlo (KMC) simulations to calculate the reaction rates for the selective oxidation of ammonia on RuO2(1 1 0) Our KMC simulations of 18 reactions among NHx(x-0-3) and OHx(x-0-2) species on RuO2(1 1 0) show 93% selectivity for NO in close agreement with experiment (similar to 95%) The chief factor in the high selectivity for NO on the RuO2(1 1 0) surface is the significantly reduced N diffusion (via N blocking) caused by various intermediates present on the RuO2(1 1 0) surface which severely inhibits the recombination rate of N + N -> N-2 but interfere far less with that of N + O -> NO owing to the nearby availability of O from dissociation of O-2 (C) 2010 Elsevier Inc All rights reserved

Journal Title

Journal of Catalysis

Volume

276

Issue/Number

2

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

371

Last Page

381

WOS Identifier

WOS:000285322800017

ISSN

0021-9517

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