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The Decomposition of Hydrazine in the Gas Phase and over an Iridium Catalyst

TitleThe Decomposition of Hydrazine in the Gas Phase and over an Iridium Catalyst
Publication TypeJournal Article
Year of Publication2013
AuthorsSchmidt, M, Gordon, MS
Journal Chemical Physics
Date Published11
Type of ArticleArticle
ISBN Number0942-9352
Accession NumberWOS:000327861100009
Keywordsab-initio, basis-sets, gamma-alumina surfaces, Gas Phase, Hydrazine, Ir Catalyst, methods, molecular-orbital, open-shell, pd automotive catalysts, perturbation-theory, Quantum Chemistry, reverse hydrogen spillover, supported metal-clusters, systems, tetrairidium clusters

ridium catalyst used in thrusters was developed. Self-Consistent Field and electron correlation calculations (with core potentials and associated basis sets) find a rich chemistry for hydrazine on this catalyst model. The model catalyst provides dramatically lower NN and NH bond cleavage energies and an even smaller barrier to breaking the NH bond by NH2 abstractions. Thus, the low temperature decomposition over the catalyst is interpreted in terms of consecutive NH2 abstractions to produce ammonia and nitrogen. The higher temperature channel, which has hydrogen and nitrogen products, may be due to a mixture of two mechanisms. These two mechanisms are successive NH cleavages with surface H + H recombinations, and the same type of assisted H-2 eliminations found to occur in the gas phase part of this study.

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