钻氣化纳 / 氣化纳 固体溶液微晶体的 电化学制备及其特性

Although the molecular structures are similar to each other, the redox property of Co(CN)⁶₃ at solid/liquid interface is not so good as Fe(CN)⁶₃. In this paper, scanning electrochemical microscopy (SECM) was adopted to construct an electrochemical microsystem with a volume of fL∼pL, in which a micropipette with micrometer-sized orifice was employed as the scanning tip. Due to the evaporation of water, the NaCl electrolyte is concentrated to form a microcrystal. During the crystallization, the redox species Co(CN)⁶₃ replaced the sites of NaCl65- unit due to their matching lattice parameters, i.e., the solid solution. Single Na₃Co(CN)₆/NaCl microcrystal was assembled in-situ between a pair of gold microelectrodes on a microchip to construct the solid/solid interface, which was found to have good voltammetric behavio.