Determination of the number of V=O species on the surface of vanadium oxide catalysts. 1. Unsupported V2O5 and V2O5/TiO2 treated with an ammoniacal solution

Akira Miyamoto, Yutaka Yamazaki, Makoto Inomata, Yuichi Murakami

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116 Citations (Scopus)

Abstract

The number of V=O species on the surface of V2O5 has been determined by using the rectangular pulse technique to detect the concentration profile of N2 produced by the following reaction, NO + NH3 + V=O → N2 + H2O + V-OH. The obtained number of V=O species on the surface of an unsupported V2O6 has been consistent with the BET surface area of the catalyst. The application of this method to a V2O5/TiO2 treated with an ammoniacal solution has shown the validity of the previous inference that the treatment of a supported vanadium oxide catalyst with an ammoniacal solution dissolves the isolated, massive vanadium oxide into the solution, while the residual oxide is regarded to interact chemically with the carrier. Furthermore, the simulation of both surface reaction and diffusion processes in V2O6 has proved the validity and soundness of the proposed method.

Original languageEnglish
Pages (from-to)2366-2372
Number of pages7
JournalJournal of physical chemistry
Volume85
Issue number16
Publication statusPublished - 1981 Dec 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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