Self-assembled membrane electrode for producing hydrogen peroxide by electrochemistry and preparation thereof
A technology of hydrogen peroxide and self-assembled membrane, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc., to achieve the effect of less catalyst consumption, uniform distribution and high efficiency
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Embodiment 1
[0036] figure 1 shows the concrete structure of the present invention, by figure 1 It can be seen that the structure of the electrochemical hydrogen peroxide membrane electrode includes a cathode catalyst support layer 2, an anode catalyst support layer 4, a cathode catalyst layer 3, an anode catalyst layer 5 and an electrolyte membrane 1; the cathode catalyst layer 3 is combined with the cathode catalyst layer The cathode surface of the membrane electrode is formed on the support layer 2; the anode catalyst layer 5 is combined on the anode catalyst support layer 4 to form the anode surface of the membrane electrode; the cathode surface of the membrane electrode and the anode surface of the membrane electrode are simultaneously combined on both sides of the electrolyte membrane 1 , forming the self-assembled membrane electrode for electrochemically generating hydrogen peroxide of the present invention.
[0037] The cathode catalyst support layer 2 and the anode catalyst suppo...
Embodiment 2
[0039] The preparation method of electrochemically generating hydrogen peroxide self-assembled membrane electrode of the present invention comprises the following specific steps:
[0040](1) Pretreatment of the anode catalyst support layer and the cathode catalyst support layer: Soak the carbon paper in the PTFE emulsion for 1 to 3 hours, and then heat-treat it at 240°C for 0.5h to remove the surfactant in the PTFE emulsion (it is dry). The content of state PTFE is 5~15%).
[0041] (2) Preparation of the catalyst layer on the anode surface: put the pretreated carbon paper into 2 PtCl 6 and 0.5M H 2 SO 4 In the electrolytic cell of the mixed solution, the Pt catalyst particles are deposited on the surface or inner surface of carbon paper or carbon cloth by electrodeposition; the carbon paper obtained above is soaked in acid for 12 to 24 hours to remove the residual PtCl 6 2- , and then cleaned with distilled water, dried; finally bonded to the exchange membrane by hot pre...
Embodiment 3
[0044] (1) Referring to the method shown in Example 1, the anode catalyst support layer and the cathode catalyst support layer were pretreated, and the anode surface catalyst layer was prepared.
[0045] (2) Preparation of cathode surface catalyst layer: the polytetrafluoroethylene (PTFE) emulsion that is 20% by the carbon nanotube that purifies or catalyst coating, conductive carbon black (Valcan XC-72) and mass fraction, according to appropriate Ratio, use isopropanol as solvent, disperse in ultrasonic wave for 15 minutes; then put the paste made after drying to remove the solvent, put it into the mold under 15MPa, press for 3 minutes to form, take it out and put it into the muffle furnace Sinter at 300-360°C for 20 minutes; after cooling, take it out and soak it in acetone for 24 hours to obtain the catalyst layer on the cathode surface with a thickness of about 1 mm, and finally attach the catalyst layer on the cathode surface by hot pressing On the surface of the exchange...
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