Electrodeposition of silver in choline chloride-ethylene glycol deep eutectic solvents
The deep eutectic solvent ( DES) is a new type of green solvent with the advantages of simple preparation,wide electrochemical window and high conductivity. In this paper,the electrochemical behavior of Ag in choline chloride-ethylene glycol ( ChCl-EG) deep eutectic solvent was investigated. The structure of ChCl-EG deep eutectic solvent was characterized by Raman spectroscopy and FTIR infrared spectroscopy,and the electrochemical behavior and nucleation mechanism of Ag electrodeposited in ChCl-EG deep eutectic solvent were studied by cyclic voltammetry and chronoamperometry. The phase composition and micro-morphology of the deposited products were analyzed by XRD and SEM. The results show that Ag is present in the form of[AgCl2]-after the addition of AgNO3 to the ChCl-EG deep eutectic solvent;the reduction of Ag+in the ChCl-EG system is a one-step deposition and a quasi-reversible process controlled by diffusion;the deposition of Ag in ChCl-EG is consistent with three-dimensional transient nucleation according to the Scharifker-Hills model;the surface of the deposited product is smooth with an irregular short rod-like structure.
万方数据
维普
