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利用微电极在二氯甲烷溶液中研究了单分子层保护金纳米团簇 ( MPCs)的量子化电容充电效应 .用示差脉冲伏安法及循环伏安法获得了明显的 5对量子化电容充电峰 ,并测量出单个 MPCs的平均电容 .单阶跃计时库仑法的研究表明 ,每对峰对应于一个电子的充入或放出 .求得电荷传递系数α=0 .44和反应速率常数 k0 =1 .65× 1 0 -2 cm/s.与常规铂电极相比 ,微电极可获得更明显的量子化充电峰 .
Quantum capacitance charge effect of monolayer protected gold nanoclusters (MPCs) was investigated by using microelectrode in methylene chloride solution.An obvious five pairs of quantum capacitor charging were obtained by differential pulse voltammetry and cyclic voltammetry Peak and measured the average capacitance of a single MPCs .Study of single-step chrono-coulometry showed that each pair of peaks corresponded to an electron charge or discharge. The charge transfer coefficient α = 0.44 and the reaction rate constant k0 = 1 .65 × 10 -2 cm / s. Compared with the conventional platinum electrode, the microelectrode can obtain a more obvious quantumization charge peak.