Optical Spectroscopy Methods in the Estimation of the Thermal Stability of Bimetallic Pd–Rh/Al 2 O 3 Three-Way Catalysts

Vladimir O. Stoyanovskii, Aleksey A. Vedyagin, Alexander M. Volodin, Roman M. Kenzhin, Elena M. Slavinskaya, Pavel E. Plyusnin, Yury V. Shubin

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5 Citations (Scopus)

Abstract

A series of three-way catalysts containing palladium and rhodium were prepared by an incipient wetness impregnation of support with aqueous solution of [Pd(NH 3 ) 4 ](NO 3 ) 2 and Na 3 [Rh(NO 2 ) 6 ] compounds. Both pure and La-doped aluminum oxides were used as a support. The catalysts showed very close activity under stoichiometric and reductive conditions, but were different in terms of thermal stability being tested in a prompt thermal aging regime. UV–Vis and luminescence spectroscopies were found to be informative for diagnostics of rhodium and palladium concentration and state, thus giving the possibility to follow the changes taking place with active components (migration, agglomeration, bulk diffusion).

Original languageEnglish
Pages (from-to)296-304
Number of pages9
JournalTopics in Catalysis
Volume62
Issue number1-4
DOIs
Publication statusPublished - 15 Feb 2019

Keywords

  • Luminescence spectroscopy
  • Metal migration
  • Prompt thermal aging
  • Three-way catalysts
  • UV–Vis spectroscopy

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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    Stoyanovskii, V. O., Vedyagin, A. A., Volodin, A. M., Kenzhin, R. M., Slavinskaya, E. M., Plyusnin, P. E., & Shubin, Y. V. (2019). Optical Spectroscopy Methods in the Estimation of the Thermal Stability of Bimetallic Pd–Rh/Al 2 O 3 Three-Way Catalysts. Topics in Catalysis, 62(1-4), 296-304. https://doi.org/10.1007/s11244-018-1112-1