Mechanism of the hydroxide ion initiated decomposition of ozone in aqueous solution

verfasst von

L. Forni, D. Bahnemann, Edwin J. Hart

Abstract

Stopped-flow experiments are reported on the OH -catalyzed chain decomposition of ozone in the pH range 11-13. O₃^-• has been identified as a product by its 430-nm absorption band. Acetate and carbonate ions inhibit this reaction. In the carbonate-inhibited reaction, the radical anion CO₃^-• has been identified by its 600-nm absorption band. In this case an apparent second-order rate constant of 115 ± 40 dm³ mol^-1 s^-1 has been obtained. Evidence is provided to support the reaction OH^- + O₃ → HO₂^- + O₂ as the primary step. On this basis, k(OH^- + O₃) equals 48 ± 12 dm³ mol^-1 s^-1. Some aspects of the overall reaction are discussed.

Externe Organisation(en)

Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
Brunel University

Typ

Artikel

Journal

Journal of Physical Chemistry

Band

86

Seiten

255-259

Anzahl der Seiten

5

ISSN

0022-3654

Publikationsdatum

1982

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Ingenieurwesen (insg.), Physikalische und Theoretische Chemie

Elektronische Version(en)

https://doi.org/10.1021/j100391a025 (Zugang: Unbekannt)