The Electrochemical Synthesis And Application Research Of Fe-Mo And Its Carbon Composites

Fe-Mo and its carbon composites have a wide range of applications in metallurgical industry, industrial catalysis and related fields for many years. In recent years, researchers have also showed that Fe-Mo and its doped materials have unique structure and properties, especially in the fields of electromagnetic, catalysis, sensors and so on. So far, the methods of preparing Fe-Mo materials are liquid-phase co-precipitation, solid-state reaction method, sol-gel method,etc. Among them, the two main methods for preparation of Fe-Mo catalyst are co-precipitation method using ferric chloride as raw material and sol-gel method using ferric nitrate as raw material.This paper adopts the double chamber cation membrane electrolysis to prepare the molybdenum acid iron (Fe2(MoO4)3) powder,and its physical and electrical catalytic properties were characterized. The carbon-doped Fe-Mo materials was prepared by mixing calcination of iron molybdenum oxide with glucose, and its electrochemical performance was tested in supercapacitor.The main content of this paper:1. Electrolytically prepare three morphologies of iron molybdate powder using two-chamber cationic membrane electrolyzer. The physical and chemical properties of the product powder were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD),high-resolution transmission electron microscope (TEM), surface area analysis (BET),fluorescence spectroscopy (PL), X-ray photoelectron spectroscopy (XPS), etc. The crystal structures of the three molybdates were also simulated using Material Studio software.2. The electrocatalytic performance of the three molybdate powders was tested by three-electrode system. The peak current density was compared with that prepared by three kinds of powders, and compared with the platinum electrode, the capacity retention rate of Sphere-Fe2(MoO4)3/GCE,Nanorod--Fe2(MoO4)3/GCE and Nanotube--Fe2(MoO4)3/GCE is 91%, 92%,88%, respectively.3. The samples of carbon-doped Fe-Mo materials were characterized by X-ray diffraction(XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (TEM), fluorescence spectroscopy (PL), surface area analysis (BET), and X-ray photoelectron spectroscopy (XPS), etc. The electrochemical properties of the carbon-doped Fe-Mo materials were tested by CV, GCD, the capacity of the electrode is 380.8F / g, 190.2F / g and 260.9F / g in 1 M lithium sulfate, sodium hydroxide and sulfuric acid electrolyte at 2 mV /s, respectively. Under the condition of 5A / g, after the discharge cycle, the capacity retention rate in 1M lithium sulfate, sodium hydroxide and sulfuric acid electrolyte was 81.8%, 75.4%and 56.8%,respectively.