部分还原氧物种的电极电位，从氧气到水。

Electrode potentials of partially reduced oxygen species, from dioxygen to water.

机构信息

Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, Eidgenössische Technische Hochschule, CH-8093 Zürich, Switzerland.

出版信息

Free Radic Biol Med. 2010 Aug 1;49(3):317-22. doi: 10.1016/j.freeradbiomed.2010.04.011. Epub 2010 Apr 18.

DOI:10.1016/j.freeradbiomed.2010.04.011

PMID:20406682

Abstract

We use published Gibbs energies of formation and equilibrium constants to determine electrode potentials for the partially reduced intermediates along the pathway of reduction of dioxygen to water, as well as of ozone and singlet dioxygen. The results are summarized in an oxidation state (Frost) diagram. Our review of the literature on electrode potentials leads us to revise values for the O(2)/O(2)(-) couple to E degrees (O(2g)/O(2)(-))=-0.35+/-0.02V and E degrees (O(2aq)/O(2)(-))=-0.18+/-0.02V from -0.33 and -0.16V, respectively. Other electrode potentials (pH 7) for the radical species covered are E degrees '(O(3g)/O(3)(-))=+0.91V, E degrees '(HO(2)(), H(+)/H(2)O(2))=+1.05V, E degrees '(H(2)O(2), H(+)/HO(), H(2)O)=+0.39V, and E degrees '(HO(*), H(+)/H(2)O)=+2.31V.

摘要

我们利用已发表的生成吉布斯自由能和平衡常数来确定部分还原中间产物沿氧气还原为水的途径以及臭氧和单线态氧气的电极电位。结果总结在一个氧化态（弗罗斯特）图中。我们对电极电位文献的综述导致我们修正了 O(2)/O(2)(-) 对的数值，E 度（O(2g)/O(2)(-))=-0.35+/-0.02V 和 E 度（O(2aq)/O(2)(-))=-0.18+/-0.02V，分别从-0.33 和-0.16V。涵盖的自由基物种的其他电极电位（pH 7）为 E 度 '(O(3g)/O(3)(-))=+0.91V，E 度 '(HO(2)(), H(+)/H(2)O(2))=+1.05V，E 度 '(H(2)O(2), H(+)/HO(), H(2)O)=+0.39V 和 E 度 '(HO(*), H(+)/H(2)O)=+2.31V。