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Preparation method of carbonized Pd (palladium)-carrying hollow anion exchange resin microsphere H2O2 (hydrogen peroxide) electroreduction catalyst

A technology for exchanging resins and anions, which is applied in the field of preparation of H2O2 electroreduction catalysts, can solve the problems of poor electroreduction performance, low electroreduction performance, oxygen escape, etc., so as to improve the electrooxidation performance and utilization rate, and inhibit the hydrolysis reaction. , the effect of reducing the production of oxygen

Active Publication Date: 2014-10-08
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether in acidic medium or alkaline medium; and whether it is a noble metal catalyst or a non-noble metal catalyst, H 2 o 2 There are two problems in the electroreduction, one is the poor performance of electroreduction, and the other is the release of oxygen from hydrolysis, see (3) formula
This leads to H 2 o 2 Problems of low electroreduction performance and low utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] With carbonized Pd-loaded hollow anion-exchange resin microspheres as the working electrode, a carbon rod as the counter electrode, and Ag / AgCl as the reference electrode, in 2mol / L NaOH and 0.40mol / L H 2 o 2 In the solution, under the voltage of -0.5V vs.Ag / AgCl, the chronocurrent density reaches 230mA / cm 2 . h 2 o 2 No bubbles escaped during the electroreduction process.

Embodiment 2

[0033] Using carbonized Pd-loaded hollow anion-exchange resin microspheres as H 2 o 2 For the cathode of direct electroreduction, 3mol / L KOH is used as catholyte; Nafin-115 proton exchange film is used as diaphragm; nano-Pt loaded on foamed nickel is used as anode, 3mol / L KOH is used as anolyte solution, 1mol / L L of sodium borohydride as fuel; when H 2 o 2 The concentration is 0.6mol / L -1 , KOH concentration is 3mol / L -1 The maximum power density of the battery is 434mW / cm -2 . h 2 o 2 No bubbles escaped during the electroreduction process.

Embodiment 3

[0035] Using carbonized Pd-loaded hollow anion-exchange resin microspheres as H 2 o 2 For the cathode of direct electroreduction, 3mol / L KOH is used as the catholyte; Nafin-115 proton exchange film is used as the diaphragm; the metal Al plate is used as the anolyte solution, and 6mol / L KOH is used as the anolyte solution; 2 o 2 The concentration is 0.6mol / L -1 , KOH concentration is 3mol / L -1 The maximum power density of the battery is 589mW / cm -2 . h 2 o 2 No bubbles escaped during the electroreduction process.

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Abstract

The invention provides a preparation method of a carbonized Pd (palladium)-carrying hollow anion exchange resin microsphere H2O2 (hydrogen peroxide) electroreduction catalyst. The preparation method is characterized by comprising the following steps: mixing styrene, divinylbenzene and deionized water, introducing N2 (nitrogen), adding CCl4 (tetrachloromethane), then adding K2S2O8 (potassium persulfate) and NaCl (sodium chloride), enabling the mixture to react for 2h to 3h at the temperature of 70DEG C, adding methylacryloyl chloroethyl trimethyl ammonium chloride to carry out grafting polymerization reaction for 12h to 15h, washing the reaction product by utilizing ethanol in a low-temperature trough, centrifugally separating the reaction liquid, and carrying out vacuum drying on the reaction product for 4h to 5h at the temperature of 50 DEG C; immersing the anion exchange resin in H2PdCl4 solution for 5h to 6h, taking out the anion exchange resin, and drying the anion exchange resin for 4h to 5h at the temperature of 50 DEG C; calcining the Pd-carrying anion exchange resin microsphere for 5h to 6h in a nitrogen atmosphere at the temperature of 650 to 750DEG C to obtain the carbonized Pd-carrying anion exchange resin microsphere H2O2 electric reduction catalyst. By transplanting Pd catalyst in the hollow carbon microspheres, the electrochemical reduction activity of the catalyst on the H2O2 can be improved, the discharging performance of a H2O2 cathode can be improved, and the escaping of oxygen can be inhibited.

Description

technical field [0001] The present invention relates to a H 2 o 2 Preparation method of electroreduction catalyst. Background technique [0002] with H 2 o 2 The fuel cell as an oxidant has the advantages of high electrochemical activity, easy storage, transportation and operation, and can replace O in some special environments (space or underwater and other oxygen-free environments). 2 , especially in several representative low-temperature fuel cells has become a current research hotspot. The use of hydrogen peroxide instead of oxygen as the oxidant has the following advantages: the reduction of oxygen is a 4-electron process with a slow kinetic rate, while the reduction of hydrogen peroxide is a 2-electron process with a lower activation overpotential and thus has a faster Reaction kinetic rate; hydrogen peroxide is a liquid at room temperature, convenient for storage and transportation, especially suitable for space, underwater and other anaerobic environments; liqui...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J35/10H01M4/92
CPCY02E60/50
Inventor 王贵领蔡庄曲军张硕曹殿学王滨
Owner HARBIN ENG UNIV
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