Abstract: The redox potentials (E) and the pH values for 0.01-0.2 M solutions of molybdovanadophosphoric heteropoly acids H3 ± nPVVmMo12 - nO40 (HPA-n, 1 ≤ n ≤ 4) and of their reduced forms H3 + m + nPVIVmVVn - m Mo12 - nO40 (HmHPA-n, O ≤ m ≤ n) were measured. The E values are determined by the redox potential of the VO+2 /VO2+ pair, which exists in an equilibrium with the heteropoly anions. The equilibrium fraction of the VO2+ cation (βIV = [VO2+]eq/[VIVΣ] detached from the heteropoly anion HmHPA-n is greater than the fraction of the detached VO+2 cation (βv = [VO+2 ]eq/[VVΣ]). The βIV/βV ratio decreases as n increases and passes through a maximum with an increase in m. The resulting dependences were interpreted in terms of the concept that the HPA-n and HmHPA-n anions participate in one-electron transfer.

Cite: Odyakov V.F. , Zhizhina E.G. , Matveev K.I.
Redox Potentials of Molybdovanadophosphoric Heteropoly Acids in Aqueous Solutions
Russian Journal of Inorganic Chemistry. 2000. V.45. N8. P.1258-1266. WOS Scopus РИНЦ

Original: Одяков В.Ф. , Жижина Е.Г. , Матвеев К.И.
Окислительно-восстановительные потенциалы молибдованадофосфорных гетерополикислот в водных растворах
Журнал неорганической химии. 2000. Т.45. №8. С.1379-1387. Scopus РИНЦ ANCAN

Dates:

Submitted:	Mar 17, 1999
Published print:	Aug 1, 2000

Identifiers:

Web of science:	WOS:000089032200020
Scopus:	2-s2.0-0012776860
Elibrary:	13353744

Citing:

DB	Citing
Web of science	23
Scopus	20
Elibrary	22