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RAS Chemistry & Material ScienceЖурнал физической химии Russian Journal of Physical Chemistry

  • ISSN (Print) 0044-4537
  • ISSN (Online) 3034-5537

Effect of Chitosan on the Electronic State and Distribution of Rhodium on the Zeolite Catalyst Surface According to Data on IR Spectroscopy of Adsorbed Carbon Monoxide

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PII
10.31857/S0044453723070269-1
DOI
10.31857/S0044453723070269
Publication type
Status
Published
Authors
M. I. Shilina
  • Affiliation: Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences
Volume/ Edition
Volume 97 / Issue number 7
Pages
944-951
Abstract
Zeolite catalysts for the conversion of dimethyl ether to light olefins with a monoatomic distribution of rhodium are studied via infrared spectroscopy of the diffuse reflection of adsorbed carbon monoxide and X-ray absorption spectroscopy. The zeolite is preliminarily treated with ultrasound to obtain a monatomic distribution of the active component on the support’s surface, and a polymer (chitosan hydrochloride) is used as the medium for dispersing rhodium at the stage of impregnation. A sample prepared via the traditional impregnation of zeolite with an aqueous solution of rhodium chloride is studied for purposes of comparison. It is shown that rhodium in the structure of zeolite treated with ultrasound is in the form of isolated metal centers whether it is deposited with or without a polymer. Synthesis with chitosan results in a more disperse distribution of rhodium on the outer surface of the zeolite and greater oxidizing ability of the catalyst.
Keywords
цеолитные катализаторы модифицирование родием ИК-спектроскопия адсорбированного СО
Date of publication
12.09.2025
Year of publication
2025
Number of purchasers
0
Views
11

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