期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 13, 期 36, 页码 16384-16394出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cp21717h
关键词
-
资金
- Christian Doppler Forschungsgesellschaft (Austria)
- voestalpine Stahl GmbH (Austria)
- Fonds der Chemischen Industrie (FCI)
The near-surface ion distribution at the solid-liquid interface during the Hydrogen Oxidation Reaction (HOR)/Hydrogen Evolution Reaction (HER) on a rotating platinum disc electrode is demonstrated in this work. The relation between reaction rate, mass transport and the resulting surface pH-value is used to theoretically predict cyclic voltammetry behaviour using only thermodynamic and diffusion data obtained from the literature, which were confirmed by experimental measurements. The effect of buffer addition on the current signal, the surface pH and the ion distribution is quantitatively described by analytical solutions and the fragility of the surface pH during reactions that form or consume H+ in near-neutral unbuffered solutions or poorly buffered media is highlighted. While the ideal conditions utilized in this fundamental study cannot be directly applied to real scenarios, they do provide a basic understanding of the surface pH concept for more complex heterogeneous reactions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据