摘要
用电化学和现场红外反射吸收光谱方法研究了Pt电极上吡啶的吸附取向。结果表明,在-0.80～0.80 V(vs SCE)范围内皆存在吡啶吸附,在较负电势下(约-0.80～-0.20 V),吡啶环可能以2种方式吸附于电极表面上,随电势变正(约-0.20～0.80V)由垂直取向向平躺取向转变,该平躺吸附降低了电极表面及其附近水分子结构的有序性。
The adsorption and orientation of pyridine on platinum electrode surface were studied by using cyclic voltammetry and in-situ FTIR reflection-absorption spectroscopy(SNIFTIRS). The experimental results obtained show that the adsorption of pyridine occurred over the whole potential range of- 0. 80-0. 80 V(vs SCE). In the potential range of - 0. 80--0. 20 V, pyridine rings were toproposed absorb in the direction perpendicular to the electrode surface in one or two different modes, while in the range of -0. 20-0. 8 V, the flat orientation was found to be predominant. The flat orientation of adsorption probably also weakened the ordering of water molecules at and near the electrode surface.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第8期868-872,共5页
Chemical Journal of Chinese Universities
基金
国家教育委员会博士点基金
关键词
铂电极
吡啶
吸附
取向
In-situ reflection-absorption spectroelectrochemisty, Adsorption and orientation of pyri-dine, Platinum electrode
