极化(电化学)
电极
化学
氢
动能
反应级数
分析化学(期刊)
无机化学
材料科学
动力学
物理化学
反应速率常数
色谱法
有机化学
物理
量子力学
作者
Osami Seri,Kazunao Furumata
出处
期刊:Catalysts
[MDPI AG]
日期:2021-10-30
卷期号:11 (11): 1322-1322
标识
DOI:10.3390/catal11111322
摘要
The hydrogen electrode reaction (HER) on Pt electrode in a H2SO4 solution when CO gas was injected/stopped was studied using polarization resistance curve. In order to elucidate and confirm the CO poisoning effect, a few curve techniques were proposed. Applying them, the kinetic parameters such as the number of electrons transferred (z) and the cathodic transfer coefficient (αc) were determined. The HER in a 0.5 mol dm−3 H2SO4 solution saturated with H2 was confirmed as a reversible reaction having z = 2. When the above solution was injected with CO, the reversible HER changed to an irreversible reaction having z = 1 and αc ≈ 0.6. Once we stopped the CO injection, alteration from the irreversible to quasireversible reaction was gradually made after several cyclic polarizations. The proposed curve techniques can provide a reliable way to determine the kinetic parameters changing among reversible, irreversible, and quasireversible reactions.
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