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.
|Number of pages||7|
|Journal||Journal of physical chemistry|
|Publication status||Published - 1981 Dec 1|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry