4,4′—联吡啶在银电极表面上吸附行为的研究

Study Of Adsorption Behaviour Of 4, 4'-Bipyridyl On Silvet Electrode Surface

本文使用恒电位方波慢扫描法,分别测量了不同浓度的4,4′—联吡啶在银电极表面的微分电容曲线,从而得到4,4′—联吡啶在银电极表面的吸附电位范围为-0.16V～-1.52V(VS:SCE)、吸附类型服从Frumkin型吸附、吸附自由能为-34.87kJ/mol。

The adsorption behaviour of 4,4'-bipyridyl on Silver electrode is studied by potentiostatic Square Wave Slow sweep methods. We have respectively measured 4,4'—bipyridyl solution of different concn—trations and obtained the differential capacity—potential curves on silver electrode. Expeimental results indicated that the adsorption of 4, 4'—bipyridyl on silver electrode are in the potential range from—0.16V t0—1.52V (VS: SCE). The Frumkin isotherm for adsorption is obeyed. The free energy of adsorption is obtained for ΔG=-34.87kJ/mol.