The State of Platinum and Structural Features of Pt/Al2O3 Catalysts in the Reaction of NH3 Oxidation


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The work is related to the fundamental research of the process of ammonia neutralization using catalytic oxidation over Pt/Al2O3 catalysts in an excess of oxygen. The catalysts are synthesized using nitrate precursors on the supports prepared from Pural SCF-55 aluminum hydroxide by the calcination in air at 550°C or 750°C for 4 h. A number of physicochemical methods are used to study morphology, dispersion, structure, and electronic state of the catalyst active component before and after the reduction in hydrogen. It is shown that the synthesized Pt/Al2O3 catalysts are characterized by high dispersion of the active component: the size of deposited platinum particles is in the range from 0.5 nm to 2.0 nm, while the proportion of oxidized and reduced Pt forms varies. Based on the results of kinetic measurements, the catalyst activity and the selectivity to all major products (N2, N2O, NO, NO2) are determined depending on the reaction temperature. The results of the catalytic testing are discussed in relation to the data on dispersion and oxidation state of platinum.

作者简介

D. Svintsitskiy

Boreskov Institute of Catalysis, Siberian Branch; Novosibirsk State University

Email: boronin@catalysis.ru
俄罗斯联邦, Novosibirsk; Novosibirsk

E. Slavinskaya

Boreskov Institute of Catalysis, Siberian Branch; Novosibirsk State University

Email: boronin@catalysis.ru
俄罗斯联邦, Novosibirsk; Novosibirsk

O. Stonkus

Boreskov Institute of Catalysis, Siberian Branch; Novosibirsk State University

Email: boronin@catalysis.ru
俄罗斯联邦, Novosibirsk; Novosibirsk

A. Romanenko

Boreskov Institute of Catalysis, Siberian Branch

Email: boronin@catalysis.ru
俄罗斯联邦, Novosibirsk

A. Stadnichenko

Boreskov Institute of Catalysis, Siberian Branch; Novosibirsk State University

Email: boronin@catalysis.ru
俄罗斯联邦, Novosibirsk; Novosibirsk

L. Kibis

Boreskov Institute of Catalysis, Siberian Branch; Novosibirsk State University

Email: boronin@catalysis.ru
俄罗斯联邦, Novosibirsk; Novosibirsk

E. Derevyannikova

Boreskov Institute of Catalysis, Siberian Branch

Email: boronin@catalysis.ru
俄罗斯联邦, Novosibirsk

A. Evtushkova

Novosibirsk State University

Email: boronin@catalysis.ru
俄罗斯联邦, Novosibirsk

A. Boronin

Boreskov Institute of Catalysis, Siberian Branch; Novosibirsk State University

编辑信件的主要联系方式.
Email: boronin@catalysis.ru
俄罗斯联邦, Novosibirsk; Novosibirsk

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