Particle electrode catalyst filling material for three-dimensional electrodes and preparation method thereof

Abstract

The invention discloses a particle electrode catalyst filling material for three-dimensional electrodes, and a preparation method thereof. The particle electrode catalyst filling material comprises alumina particle electrodes and graphene-modified stannic oxide coated on the alumina particle electrodes. The preparation method of the particle electrode catalyst filling material comprises the following steps of 1) carrying out a pretreatment on alumina particle electrodes, 2) preparing graphene-stannic chloride sol, and 3) mixing the pretreated alumina particle electrodes and the graphene-stannic chloride sol, stirring uniformly the mixture by a constant temperature magnetic heating stirrer, standing, aging, then carrying out a centrifugal separation process, drying and calcining to obtain a particle electrode catalyst filling material for three-dimensional electrodes. The preparation method has the advantages of simple process, low preparation cost, and easy popularization and application. The particle electrode catalyst filling material prepared through the preparation method has the advantages of stable property, high electrocatalysis efficiency and difficult stratification.

Description

technical field [0001] The invention belongs to the technical field of electrochemical catalysis, and in particular relates to a particle electrode catalyst filler for a three-dimensional electrode and a preparation method thereof. Background technique [0002] Three-dimensional electrodes (Three-Dimensional Electrodes) is a new type of electrochemical reactor, also known as particle electrodes or bed electrodes. It is to fill granular or other debris-like working electrode materials between the electrodes of the traditional two-dimensional electrolyzer and charge the surface of the particles, so that the charges are distributed in three-dimensional space. On the one hand, the three-dimensional nature of the electrode greatly increases the electrode reaction area, improves the electrode reaction speed, and greatly improves the space-time yield that characterizes the reaction yield compared with the flat electrode; on the other hand, due to the existence of internal resistanc...

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Problems solved by technology

However, the above-mentioned particle electrodes are all unipolar, which is not conducive to engineering applications, and PbO 2 There will be a large amount of Pb dissolved in the reaction, which will easily cause secondary pollution

However, activated carbon, mica, silica, and coated activated carbon are used as bipolar particle electrodes. Due to the inconsistency in the specific gravity and particle size of the filler, the electrode material and the insulating material are easily delaminated during actual operation, thereby causing the insulator to fail.