BIMETALLIC Pt-Ag CATALYSTS SUPPORTED ON MESOPOROUS SILICON OXIDE MСM-41 IN THE 4-NITROPHENOL REDUCTION

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Mesoporous MCM-41 with a specific surface area of 1134 m2/g was synthesized. Based on it, supported mono- and bimetallic Pt-Ag catalysts with different metal ratios were prepared by incipient wetness impregnation. Using XRD and DRS methods, it was shown that after the reductive high-temperature treatment of Pt-Ag catalysts, metal nanoparticles in contact with Pt and Ag were formed on the surface. The TPR-H2 method showed an increase in the reactivity of bimetallic catalysts compared to monometallic catalysts due to the interaction of AgOx and PtOy centers. The catalysts were studied in the reduction reaction of 4-nitrophenol with sodium borohydride. A significant increase in the rate of reduction of 4-nitrophenol on bimetallic catalysts due to the synergistic effect of Pt and Ag was established.

作者简介

A. Savel’eva

National Research Tomsk State University

Tomsk, Russia

E. Evdokimova

National Research Tomsk State University

Tomsk, Russia

G. Mamontov

National Research Tomsk State University

Email: grigoriymamontov@mail.ru
Tomsk, Russia

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