Temperature dependence of hydrogen atom reaction with nitrate and nitrite species in aqueous solution

被引：45

作者：

Mezyk, SP ^{[1
]}

Bartels, DM ^{[1
]}

机构：

[1] ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 1997年 / 101卷 / 35期

关键词：

D O I：

10.1021/jp970934i

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Arrhenius parameters for the reaction of hydrogen atoms with NO3-, HNO2, and NO2- in aqueous solution have been determined by the use of pulse radiolysis and electron paramagnetic resonance free induction decay attenuation measurements. At 25.0 degrees C, the calculated rate constants for these compounds are (5.61 +/- 0.51) x 10(6), (3.86 +/- 0.09) x 10(8), and (1.62 +/- 0.05) x 10(9) dm(3) mol(-1) s(-1) respectively, with corresponding activation energies of 48.7 +/- 1.0 (15.2-84.5 degrees C), 21.54 +/- 0.69 (5.9-62.8 degrees C) and 15.59 +/- 0.36 (6.2-86.8 degrees C) kJ mol(-1). Computer modeling of these systems suggests that . H atom reaction with either anion directly produces hydroxide anion and the corresponding NOx radical.

引用

页码：6233 / 6237

页数：5

共 54 条

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