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Reaction Kinetics and Catalysis Letters

, Volume 30, Issue 2, pp 345–351 | Cite as

Influence of reoxidation temperature on TPR of zirconia supported rhodium

  • W. K. Jóźwiak
Article

Abstract

Based on TPR investigations of oxidized 5 % Rh/ZrO2 catalyst a substantial effect of rhodium both on increase in degree of surface reduction of the support and lowering of reduction temperature range as compared to the support alone was observed. With growing reoxidation temperature, a gradual increase in degree of oxidation of rhodium takes place until Rh2O3 is formed at temperature about 770 K. Simultaneously, the support surface is gradually reoxidized until a prilmary state is reporduced at 720–779 K.

Keywords

Oxidation Physical Chemistry Zirconia Catalysis Gradual Increase 
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

Исходя из исследований ТПВ окисленного катлизатора 5% Rh/ZrO2, было однарузено значнтельное влияние родия как на увеличение степени поверхностного восстановления носителя, так и на понизение температурного интевала по савнению с самим носителем. С повышем температуры реокисления происходит постепенное повышение степени окисления родия, пока ни образуется Rh2O3 при 770 К. Одновременно, постепенно реокисляется поверхность носителя, пока ни возобновляется исходное состояние при 720–770 К.

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Copyright information

© Akadémiai Kiadó 1986

Authors and Affiliations

  • W. K. Jóźwiak
    • 1
  1. 1.Institute of General ChemistryTechnical University of ŁódźŁódźPoland

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