Electrochemical Behavior of Graphite Felt Electrodes in the Indirect Electrochemical Synthesis Reaction with Ce3+/Ce4+ as the Medium
WANG Xiumei1, YANG Fengjuan1, LI Zhaohua1, MA Xinhui1, PANG Long2
1. National Quality Supervision and Inspection Center for Aluminum and Aluminum Products, Sanmenxia 472000, China;
2. College of Material and Chemical Engineering‚ Zhengzhou University of Light Industry‚ Zhengzhou 450001‚ China
Abstract：The electrochemical behavior of graphite felt electrodes in the indirect electrochemical synthesis reaction with Ce3+/Ce4+ as the medium was investigated by cyclic voltammetry, constant current electrolysis, scanning electron microscopy and X-ray energy spectroscopy techniques. The results showed that the oxidation response current density of graphite felt electrodes to cerium sulfate (Ⅲ) was much higher than that of graphite and lead electrodes, and the current density increased with the increase of the thickness of graphite felt. The constant current electrolysis experiments showed that under the conditions of 27 ℃, high current density of 100 mA/cm², and sulfuric acid concentration of 1.0 mol/L, the current efficiency could reach more than 95%. It was concluded by scanning electron microscopy and X-ray energy spectrometer that after 30 times of electrolysis at 27 ℃, the surface morphology of graphite felt electrodes remained stable and unchanged, and there were only carbon elements and a small amount of sulfur elements on the electrode surface. Graphite felt electrodes can greatly improve the space-time yield of indirect electrochemical synthesis reaction in industrial production, achieve the effect of reducing energy consumption, and have an extremely high service life.
WANG Xiumei,YANG Fengjuan,LI Zhaohua et al. Electrochemical Behavior of Graphite Felt Electrodes in the Indirect Electrochemical Synthesis Reaction with Ce3+/Ce4+ as the Medium[J]. Chemical Reaction Engineering and Technology, 2024, 40(5): 445-451.
