Nanometer iron-manganese composite oxide loaded gas diffusion electrode and preparation and application thereof

Abstract

The invention discloses a nanometer iron-manganese composite oxide loaded gas diffusion electrode. A catalytic layer is added onto a gas diffusion layer of an electrode to form a catalytic gas diffusion electrode; the catalytic layer is composed of polytetrafluoroethylene and a nanometer-scale ferric oxide and manganese oxide loaded base material. The invention also provides a preparation method of the nanometer iron-manganese composite oxide loaded gas diffusion electrode. The nanometer iron-manganese composite oxide loaded gas diffusion electrode can be applied to poor-quality water treatment. The nanometer-scale iron-manganese composite oxide loaded on active carbon powder is prepared by a co-precipitation method, and finally, the nanometer iron-manganese composite oxide loaded catalytic gas diffusion electrode is prepared; by the loaded nanometer iron-manganese composite oxide, the catalytic efficiency of the electrode in a catalytic reaction is improved; the nanometer iron-manganese composite oxide loaded gas diffusion electrode can be applied at a neutral medium condition; the application range of the electrode is widened; the catalytic efficiency of the catalytic gas diffusion electrode is improved.

Description

technical field [0001] The invention belongs to the application of electrochemistry and nanotechnology in the field of environment, and relates to a heterogeneous catalytic Electro-Fenton (Electro-Fenton) inferior water treatment technology, in particular to a gas diffusion electrode loaded with nano-iron-manganese composite oxide and Its preparation and application. Background technique [0002] Fenton technology has been widely used in soil and groundwater remediation due to its wide application range and fast response speed. Electro-Fenton technology is an improved Fenton technology. The principle is to use the oxidation-reduction reaction on the electrode surface to directly generate hydrogen peroxide or ferrous ions in the electrolytic system. Hydrogen peroxide generates hydroxyl radicals under the catalysis of ferrous ions to degrade organic matter in the system. Using the gas diffusion electrode as the electro-Fenton cathode can greatly improve the generation effici...

AI Technical Summary

Problems solved by technology

The disadvantage is Fe 2+ A large amount of ferrous hydroxide is generated in the neutral pH range and eventually turns into sodium hydroxide and iron precipitation, which reduces the catalytic efficiency of the catalyst

Images