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单词 Underpotential deposition
释义

Underpotential deposition

中文百科

欠电势沉积

欠电势沉积 (Underpotential Deposition, UPD) 是指在平衡电位以上发生的电沉积现象,其中最常见的是金属离子沉积为金属。

目前认为,欠电势沉积是发生沉积的金属M与电极表面的底物S之间强相互作用的结果。发生欠电势沉积的前提是M-S之间的作用力比起纯金属M的晶体中的M-M作用力更强。实验观察到的欠电势沉积主要是单层的,这为上面的机理提供了支持。

欠电势沉积在单晶表面比在多晶表面要显着得多。

英语百科

Underpotential deposition 欠电势沉积

Underpotential deposition (UPD), in electrochemistry, is a phenomenon of electrodeposition of a species (typically reduction of a metal cation to a solid metal) at a potential less negative than the equilibrium (Nernst) potential for the reduction of this metal. The equilibrium potential for the reduction of a metal in this context is the potential at which it will deposit onto itself. Underpotential deposition can then be understood to be when a metal can deposit onto another material more easily than it can deposit onto itself.

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更新时间:2025/6/17 3:09:42