Title

Selective Oxidation Of Ammonia On Ruo2(1 1 0): A Combined Dft And Kmc Study

Keywords

Ammonia; Catalysis; Density functional theory; Kinetic Monte Carlo; Oxidation; Oxide; Ruthenium; Selectivity

Abstract

We have used a combination of density functional theory (DFT) 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 RuO 2(1 1 0) show 93% selectivity for NO, in close agreement with experiment (∼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 O2.© 2010 Elsevier Inc. All rights reserved.

Publication Date

12-15-2010

Publication Title

Journal of Catalysis

Volume

276

Issue

2

Number of Pages

371-381

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.jcat.2010.09.029

Socpus ID

78449250732 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/78449250732

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