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Issue 22, 1992
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Pulse radiolysis study of concentrated phosphoric acid solutions

Abstract

In the pulse radiolysis of concentrated phosphoric acid solutions, in the direct action on radiation on phosphoric acid gives rise to the phosphate radical. The yields of the phosphate radical and the hydroxyl radical are proportional, respectively, to the electron fractions of phosphoric acid and water, and can be quantified as G(˙OH + H2PO˙4)= 0.30fw+ 0.33fsµmol J–1. The forward and reverse rate constants of the equilibrium ˙OH + H3PO4⇄ H2O + H2PO˙4 were evaluated as 4.2 × 104 and 2.5 × 103 dm3 mol–1 s–1 respectively, from which E0(H2PO˙4, H+/H3PO4)= 2.65 V was derived. The decay kinetics and the reactions of the phosphate radical have also been studied.

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Article type: Paper
DOI: 10.1039/FT9928803319
Citation: J. Chem. Soc., Faraday Trans., 1992,88, 3319-3322
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    Pulse radiolysis study of concentrated phosphoric acid solutions

    P. Jiang, Y. Katsumura, M. Domae, K. Ishikawa, R. Nagaishi, K. Ishigure and Y. Yoshida, J. Chem. Soc., Faraday Trans., 1992, 88, 3319
    DOI: 10.1039/FT9928803319

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