Experimental study by cyclic voltametry of standard potential of Se(IV)/Se(VI) redox system

Doi, Reisuke ; Yui, Mikazu

The standard potential of Se(IV)/Se(VI) couple has been obtained by cyclic voltametry in the relatively pure system. The formal potentials of the selenium redox reaction have been determined in NaClO $_{4}$ medium of various ionic strength (I (mol/kg) = 0.500, 1.00, 1.50, 2.00) at room temperature. These data have been interpreted by using the Specific Ion Interaction Theory to give the following standard potential. In addition, the reactive chemical species have been identified by the dependence of peak potential of oxidation wave on Se concentration. As a result, the following standard potential was determined: HSeO $_{3}$ $^{-}$ + H $_{2}$ O = SeO $_{4}$ $^{2-}$ + 3H $^{+}$ + 2e $^{-}$ E $^{0}$ = 0.8210.002 V vs. SHE.

Language	:	Japanese
Journal	:	Genshiryoku Bakkuendo Kenkyu (CD-ROM)
Volume	:	16
Number	:	1
Pages	:	p.35 - 42
Publication Year/Month	:	2009/12
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Paper URL	:	https://doi.org/10.3327/jnuce.16.35
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Keywords	:	no keyword
Research Facility	:	ENTRY(地層処分基盤研究施設)
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Registration No. : AA20090130
JAEA Abstracts No. : 38000652
Paper Submission No. : 7257

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