PbO2电极上S2O82-离子阳极形成过程的研究

摘要/Abstract

摘要： 用分解稳态极化曲线的方法,在PbO₂阳极上,H₂SO₄和H₂SO₄-(NH₄)₂SO₄溶液中得到了相应于S₂O₈^2-形成和O₂发生的动态力学数据。在高于+2.25V的电位区,这两个反应的Tafel斜率都是2.303RT/βF(β=0.52～O.55),S₂O₈^2-形成的电流效率低于29%,且几乎不随阳极电位而改变。S₂O₈^2-的形成速度与溶液中硫酸离子浓度无关,而O₂发生速度随硫酸离子浓度的增大稍有减慢。提出了在高电位区S₂O₈^2-形成及O₂发生的机理。

Abstract: The kinetic data related respectively to S₂O₈^2- formation and O₂ evolution on PbO₂ anode in H₂SO₄ and H₂SO₄-(NH₄)₂SO₄ solutions were obtained by methoed of resolving the steady state polarization curve. The Tafel slopes for both S₂O₈^2- formation and O₂ evolution were 2.303 RT/βF (β=0.52-0.55) at potential higher than + 2.25V vs SHE. The current efficiency of S₂O₈^2- formation was lower than 29% and it almost remained unchanged with potentials. The reaction order of S₂O₈^2- formation with respect to sulfate ions was found to be zero, while the O₂ evolution rate was found to deerease slightly with the increase of sulfate concentration at high potential. A mechanism for above two processes was proposed.

石崇铁, 朱荣昭. PbO₂电极上S₂O₈^2-离子阳极形成过程的研究[J]. 应用化学, 1987, 0(4): 35-39.

Shi Chongtie, Zhu Rongzhao. STUDY ON ANODIC FORMATION OF SO₈^2- ION ON PbO₂ ELECTRODE[J]. Chinese Journal of Applied Chemistry, 1987, 0(4): 35-39.

PbO₂电极上S₂O₈^2-离子阳极形成过程的研究

STUDY ON ANODIC FORMATION OF SO₈^2- ION ON PbO₂ ELECTRODE

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价