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Catkin hollow carbonization tube composite precious metal fuel-cell catalyst and preparation method of catkin hollow carbonization tube

A technology of fuel cells and precious metals, applied to battery electrodes, circuits, electrical components, etc., can solve the problems of complex preparation process, high requirements for experimental equipment, unfavorable large-scale production, etc., and achieve simple preparation process, many adsorption active points, and improved Effects on electrochemical performance and utilization

Active Publication Date: 2015-07-22
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of these carbon materials is complicated, and the required experimental equipment is demanding, which is not conducive to large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] With catkin hollow carbon tube composite Pt as the working electrode, 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 298mA / cm 2 ;H 2 o 2 No bubbles escaped during the electroreduction process.

[0033] With catkin hollow carbon tube composite Pt as the working electrode, carbon rod as the counter electrode, and Ag / AgCl as the reference electrode, in 3mol / L NaOH and 0.30mol / L NaBH 4 In the solution, under the voltage of -0.5V vs.Ag / AgCl, the chronocurrent density reaches 321mA / cm 2 ;NaBH 4 No air bubbles escaped during the electro-oxidation process.

example 2

[0035] Using Catkin Hollow Carbonized Tubes Composite with Pd as H 2 o 2 For the cathode of direct electroreduction, 3mol / L KOH is used as catholyte; Nafin-115 proton exchange membrane is used as diaphragm; nano-Pd 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 521mW / cm -2 . h 2 o 2 No bubbles escaped during the electroreduction process.

[0036] Using Catkin Hollow Carbonized Tube Composite Pd as NaBH 4 The anode of direct electrooxidation uses 3mol / L KOH as the catholyte; Nafin-115 proton exchange membrane as the diaphragm; nano-Pd loaded on the nickel foam as the anode, and 2mol / L KOH as the catholyte solution, 0.5mol / L of hydrogen peroxide is an oxidizing agent; when NaBH 4 The concentration is 0.6mol / L -1 , KOH concentration is 2mol / L -1 The maximum power density ...

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PUM

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Abstract

The invention provides a catkin hollow carbonization tube composite precious metal fuel-cell catalyst and a preparation method of a catkin hollow carbonization tube. The preparation method of the catkin hollow carbonization tube comprises the steps of: adding catkins to acetone, and carrying out ultrasonic treatment; violently stirring and washing by using distilled water; carrying out vacuum drying; adding the treated catkins to a potassium hydroxide solution, grinding into powder after drying by distillation, feeding the powder into a tubular furnace, heating, then naturally cooling after heat preservation to obtain the catkin hollow carbonization tube. The catkin hollow carbonization tube is put in precious metal solution-containing electrodeposition liquid and subjected to electrolytic deposition so as to obtain the catkin hollow carbonization tube composite precious metal fuel-cell catalyst. The catkin hollow carbonization tube composite precious metal fuel-cell catalyst can inhibit the hydrolysis reaction of an oxidizing agent and fuels and reduce the generation of gases. Lots of voids exist on the tube wall of the catkin hollow carbonization tube and can provide channels for electrolyte, and electrochemical reactions happen through catalysis of precious metals. Oxygen generated through hydrolysis can be sealed in the catkin hollow carbonization tube, reacts continuously and does not release O2, and the electrochemical property and utilization rate of an oxidizing agent and fuels are greatly increased.

Description

technical field [0001] The invention relates to a composite noble metal fuel cell catalyst. The invention also relates to a catalyst for a fuel cell composed of catkin hollow carbonized tubes and precious metals. Background technique [0002] Direct Borohydride-Hydrogen Peroxide Fuel Cell (DBHPFC) is a new type of direct liquid fuel cell using borohydride as anode fuel and hydrogen peroxide as cathode oxidant. DBHPFC has the characteristics of high energy density, compact structure, and can work under anaerobic conditions. In general, H 2 o 2 The occurrence of the electroreduction reaction involves two parallel reaction pathways, the direct pathway and the indirect pathway. h 2 o 2 The direct electroreduction reaction is a 2-electron transfer process, with O 2 Compared to (4e - ), with fast reduction kinetics, and H 2 o 2 The ratio of the solid-liquid two-phase reaction zone formed at the cathode to O 2 The solid / liquid / gas three-phase reaction zone formed at the ...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/88
CPCH01M4/8817H01M4/92H01M4/926Y02E60/50
Inventor 王贵领张栋铭李琳徐暘曹殿学李一举
Owner HARBIN ENG UNIV
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