摘要
用电化学现场扫描遂道显微镜(in situ STM)和电化学调制紫外可见反射光谱(EMUV/VRS)技术研究了铂电极在KCl溶液中的电化学行为, 结果表明,在KCl溶液中,Pt电极阳极氧化/阴极还原过程为阳极溶解/阴极沉积过程,阳极溶解可能经历吸附的Cl^-离子与Pt表面原子生成表面铂氯化物步骤,实验表明STM比EMUV/VRS具有更高的空间分辨率。
The electrochemical behaviour of Pt polycrystalline electrode in 0. 1 mol/L KC1 solution was investigated by using in situ scanning tunneling microscopy (STM) and elect rochemically modulated UV-Vis reflection spectroscopy (EMUV-VRS). The results of STM and electrore-flectance effect show that the anodic dissolution/cathodic deposition is a dominant oxidation-reduction process of Pt electrode in the potential regions between 0. 0 and 1.0 V vs. SCE, and that the anodic process involves the formation of surface complex consisting of platinum ions and Cl- ions, and the heterogeneous dissolution of Pt electrode surface. It is also shown that STM can give much better spatial resolution than EMUV-VRS.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第5期662-665,共4页
Chemical Journal of Chinese Universities
关键词
铂
氯化钾
电反射谱
STM
EMUV/VRS
Platinum, Potassium chloride, Scanning tunneling microscopy, Electroreflectance spectrum
