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• W2046376237 abstract "The catalytic reduction of nitric oxide by hydrogen over a Pt surface is studied using a dynamic Monte Carlo (MC) method on a square lattice under low pressure conditions. Using a Langmuir–Hinshelwood reaction mechanism, a simplified model with only four adsorbed species (NO, H, O, and N) is constructed. The effect on the NO dissociation rate, the limiting step in the whole reaction, is inhibited by co-adsorbed NO and H 2 molecules and is enhanced both by the presence of empty sites and adsorbed N atoms at nearest neighbors. In these simulations, several experimental parameter values are included, such as: adsorption, desorption and diffusion of the reactants. The phenomenon is studied while varying the temperature over the 300–550 K range. The model reproduces well-observed TPD and TPR experimental results. For the whole NO+H 2 reaction, the phenomena of “surface explosion” is observed and can be explained as the result of the abrupt production of N 2 due to both the autocatalytic NO decomposition favored by the presence of vacant sites and the development of inhomogeneous fluctuations. MA simulations also allow a visualization of the spatial development of the surface explosion as heating proceeds. ► The catalytic reduction of NO by H 2 over Pt(100) is studied by dynamic Monte Carlo. ► For NO+H 2 reaction, the phenomenon of “surface explosion” is observed. ► The abrupt production of N2 is due to the autocatalytic NO decomposition. ► It is favored by vacant sites and the development of inhomogeneous fluctuations." @default.
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• W2046376237 date "2011-11-01" @default.
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• W2046376237 title "Dynamic Monte Carlo simulation of the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si37.gif display=inline overflow=scroll><mml:mstyle mathvariant=normal><mml:mi>NO</mml:mi></mml:mstyle><mml:mo>+</mml:mo><mml:msub><mml:mrow><mml:mstyle mathvariant=normal><mml:mi>H</mml:mi></mml:mstyle></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> reaction on Pt(100): TPR spectra" @default.
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• W2046376237 doi "https://doi.org/10.1016/j.physa.2011.06.051" @default.
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