ON THE CATALYTIC BEHAVIOUR OF 2:18-HETEROPOLY-MOLYBDOPHOSPHORIC ACID (SALTS) IN THE DECOMPOSITION OF HO2

Chinese Journal of Applied Chemistry ›› 1988, Vol. 0 ›› Issue (3): 48-53.

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ON THE CATALYTIC BEHAVIOUR OF 2:18-HETEROPOLY-MOLYBDOPHOSPHORIC ACID (SALTS) IN THE DECOMPOSITION OF H_O₂

Qu Shuhua¹, Wu Yue¹, Wang Enbo², You Wanshen²

1. Changchun Institute of Applied Chemistry, Academia Sinica;
2. Department of Chemistry, Northeast Normal University Changchun

Received:1987-02-19 Revised:1987-11-19 Published:1988-06-10 Online:1988-06-10

Abstract

Abstract: The catalytic behaviour of 2:18 heteropoly molybdophosphoric acid and its salts(Dawson structure) in the decomposition of H₂O₂ has been studied in comparison with that of 1:12 heteropolymolybdophosphoric acid and its salts (Kcggin structure). The results show that H₆(P₂Mo₁₈O₆₂, so as Ha(PMo₁₂O₄₀ does not posses catalytic activity for H₂O₂ decomPosition, whereas their Fe³⁺, Cu²⁺ salts are more active and their kinetic behaviour toward H₂O₂ decomposition is different from that of 1:12 heteropolymolybdophosphate in that it obeys the second order equation. It is related to the environmental difference of the countercation in these two structures. The catalytic behaviour remains unchanged, when part of molybdenum ions in 2:18 heteropolymolybdophosphorie acid is substituted by vanadium ions. It indicates that the substtituted vanadium ions are not only the active species, but have the same environment in these two structures.

Key words: Heteropolyacid, Molybdate, Phosphate, Catalytic activity, Hydrogen peroxide, Decomposition

Qu Shuhua, Wu Yue, Wang Enbo, You Wanshen. ON THE CATALYTIC BEHAVIOUR OF 2:18-HETEROPOLY-MOLYBDOPHOSPHORIC ACID (SALTS) IN THE DECOMPOSITION OF H_O₂[J]. Chinese Journal of Applied Chemistry, 1988, 0(3): 48-53.

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ON THE CATALYTIC BEHAVIOUR OF 2:18-HETEROPOLY-MOLYBDOPHOSPHORIC ACID (SALTS) IN THE DECOMPOSITION OF H_O₂

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