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H2O2 electroreduction catalyst of youngia japonica stamen hollow carbonization tube composite Co3O4

A catalyst, yellow quail technology, applied in circuits, electrical components, battery electrodes and other directions, can solve the problems of poor electrochemical performance, low electro-oxidation performance, low utilization rate, etc. Effect

Pending Publication Date: 2020-04-10
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

h 2 o 2 There are two problems in the electroreduction of , one is poor electrochemical performance, and the other is hydrolysis to gas evolution, see (1) and (2)
This leads to H 2 o 2 Electroreduction performance and NaBH 4 Problems with low electro-oxidation performance and low utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Co 3 o 4 The catalyst is the working electrode, the carbon rod is the counter electrode, and Ag / AgCl is the reference electrode. In 2mol / L NaOH and 0.40mol / L H 2 o 2 In the solution of -0.5V vs.Ag / AgCl, the chronocurrent density reaches 225mA / cm 2 , H 2 o 2 No bubbles escaped during the electroreduction process.

Embodiment 2

[0026] Composite NiCo with yellow quail flower stamen hollow carbonized tube 2 o 4 The catalyst is the working electrode, the carbon rod is the counter electrode, and Ag / AgCl is the reference electrode. 2 o 2 In the solution, under the voltage of -0.5V vs.Ag / AgCl, the chronocurrent density reaches 243mA / cm 2 ;H 2 o 2 No bubbles escaped during the electroreduction process.

[0027] A H2O2 electroreduction catalyst based on hollow carbonized tubes of yellow quail flower stamens composited with Co3O4, the hollow carbonized yellow quail flower stamens loaded with Co 3 o 4 Catalyst, promoting H 2 o 2 The electroreduction reaction can also absorb the O produced by hydrolysis. 2 . The hollow yellow quail flower stamen carbonized tube wall has many pores, which can provide channels for reactants, and the yellow quail flower stamen carbonized tube can convert H 2 o 2 O produced by electroreduction and hydrolysis 2 closed in the tube, greatly improving the H 2 o 2 The ele...

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PUM

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Abstract

The invention provides an H2O2 electroreduction catalyst of youngia japonica stamen hollow carbonization tube composite Co3O4. The H2O2 electroreduction catalyst is prepared by the following methods of preparing a youngia japonica stamen hollow carbonization tube; adding the obtained youngia japonica stamen hollow carbonization tube into a 0.6 mol / L CoSO4 and 5mol / L NH4NO3 solution, then dropwiseadding 20mL of ammonia water into the solution, and uniformly stirring; preheating the uniformly stirred solution in a drying oven at 90 DEG C for 90 minutes, reacting at 90 DEG C for 12-15 hours, andnaturally cooling to room temperature to obtain the H2O2 electroreduction catalyst of the youngia japonica stamen hollow carbonization tube composite Co3O4. The H2O2 electroreduction catalyst effectively improves the rapid permeation of electrolyte, the conduction of electrons and the electrochemical performance of an electrode; the youngia japonica stamen carbonization tube can seal the O2 generated by H2O2 electroreduction and hydrolysis in the tube, so that the electroreduction performance and the utilization rate of H2O2 are greatly improved.

Description

technical field [0001] The invention relates to a catalyst, in particular to a hollow carbonized tube composite Co 3 o 4 H 2 o 2 electroreduction catalyst. Background technique [0002] Oxidants in fuel cells are mainly O 2 and H 2 o 2 Two kinds, hydrogen peroxide (molecular formula H 2 o 2 ) is a very common industrial product, which has good oxidizing properties, is safe and non-toxic during use, and does not emit harmful substances. Therefore, it is widely used in many fields such as papermaking, textiles, military affairs, and medicine. due to H 2 o 2 is one of the strongest oxidizing agents than O 2 has a lower activation overpotential, so H 2 o 2 As an oxidizing agent, it has greater advantages. Choose H 2 o 2 The advantage of being an oxidizing agent is firstly because H 2 o 2 If it is a liquid oxidant, the whole battery system will appear more compact, easy to operate, and easy to carry; secondly, the H 2 o 2 The reduction is a 2-electron process,...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/9016H01M4/9083H01M4/8878Y02E60/50
Inventor 李昕航王贵领周春良赵婧
Owner HARBIN ENG UNIV
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