Anion replacement at Au(110)/electrolyte interfaces.

Anion replacement at Au(110)/electrolyte interfaces.
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Au(110)/电解质界面处的阴离子置换。

DOI:
10.1039/c6cp03576k
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发表时间:
2016
期刊:
PCCP
影响因子:
--
通讯作者:
Harrison P
Harrison P
中科院分区:
--
文献类型:
--
作者:
Harrison P

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在不同的电解液、pH值和外加电位下,观察到Au(110)表面的特征反射各向异性谱(RAS)。有人建议,这种常见的RAS配置文件产生之间的相互作用的电位施加到Au(110)电极和氧化物种的偶极矩,定位在一个共同的位置相对于Au的电子能带结构的费米能级。当电位在0.3 V和0.6 V之间切换时,观察到Au(110)/H2SO 4的RAS曲线的快速变化,在该电位范围内,表面未被重构并且低于表面氧化的电位范围。光谱的变化是在不到10毫秒完成,是可逆的,是由于吸附的阴离子的含氧物种的替代。
A characteristic reflection anisotropy spectrum (RAS) is observed from a Au(110) surface in a wide range of electrolytes and combinations of pH and applied potentials. It is suggested that this common RAS profile arises from an interaction between the potential applied to the Au(110) electrode and the dipole moments of oxidized species that locates the Fermi level at a common position with respect to the electronic band structure of Au. Rapid changes in this RAS profile are observed for Au(110)/H2SO4 as the potential is switched between 0.3 V and 0.6 V, a potential range in which the surface is not reconstructed and below the potential range of surface oxidation. The spectral changes are completed in less than 10 ms, are reversible and are attributed to the replacement of adsorbed anions by an oxygenated species.
DOI: --
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