An electron transfer in CuCl-CuCl2 melt at different Cl2 partial pressures
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Electron and ion transference numbers, conductivity, and Cu+/Cu2+ concentration ratio in the CuCl-CuCl2 melt are measured at temperature of 560 °C and partial pressure of chlorine from 0.1 to 1 atm. The electron transference numbers and the total conductivity grow with chlorine partial pressure; that is accompanied by decreasing of ionic conductivity both in contribution and absolute values. The total conductivity changes from ∼6 to ∼8 S cm−1 while pCl2 increases from 0.1 to 1 atm. The electron transference numbers increase from 67 to 95% in the same chlorine partial pressure range. The electronic conductivity is evaluated by two independent methods. Values of electronic conductivity obtained from the concentrations of Cu2+ ions are close to that obtained by Faraday efficiency measurements.
KeywordsIonic-electronic melt Electronic conductivity Transference numbers Copper chlorides Electron transfer
The reported study was funded by RFBR, according to the research project no. 16-33-60095 mol_а_dk.
The research has been carried out with the equipment of the Shared Access Center “Composition of Compounds” of the Institute of High Temperature Electrochemistry.
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