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Reaction Kinetics and Catalysis Letters

, Volume 7, Issue 1, pp 53–58 | Cite as

A study of pyridine adsorption on supported vanadium-aluminium catalysts by IR and UV spectroscopy

  • D. V. Spiridonova
  • E. A. Fokina
  • K. N. Spiridonov
  • O. V. Krylov
Article

Abstract

The acidic properties of supported vanadium-aluminum catalysts have been studied by the IR and UV spectroscopy of adsorbed pyridine. Introduction of vanadium ions does not result in the appearance of acidity of the Brönsted type in the temperature range under study (25–500°C). The adsorption of pyridine on samples containing large amounts of V2O5 reversibly increases the transmission in the IR region, which is due to the decrease of current carrier concentration. On pure Al2O3, pyridine is oxidized beginning with 400°C; V2O5 decreases the temperature of the beginning of oxidation to 200–300°C.

Keywords

Oxidation Spectroscopy Physical Chemistry Al2O3 Catalysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abstract

Методами ИК и УФ спектроскопии адсорбированного пиридина исследованы кислотные свойства нанесенных ванадий-алюминиевых катализатороб. Показаноб что введение ионов ванадия не приводит к появдению кислотности бренстедовского типа в исследюванном интервале температу⌕ (25°–500°C). Адсорбция пиридина на образцах, содержащих большое количество V2O5, обратимо увеличивает пропускание в ИК-области, что связамо с уменьшением концентрации носителей тока. На чистой Al2O3 начиная с 400°C пиридин окисляется, V2O5 снижает температуру начала окисления до 200–300°C.

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References

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Copyright information

© Akadémiai Kiadó 1977

Authors and Affiliations

  • D. V. Spiridonova
    • 1
  • E. A. Fokina
    • 1
  • K. N. Spiridonov
    • 1
  • O. V. Krylov
    • 1
  1. 1.Institute of Chemical PhysicsAcademy of Science of the USSRMoscow

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