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Preparation method of antipolar alloy catalyst for fuel cell

An alloy catalyst and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of reducing the catalytic effect of platinum on the HOR reaction of batteries, hindering the contact between hydrogen and platinum, and large particle size of iridium oxide. The effect of reverse polarity time, increased difficulty, and simple preparation process

Pending Publication Date: 2022-04-19
QINGDAO CHUANGQI XINNENG CATALYSIS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This anti-reversal scheme has two deficiencies: one is that the particle size of iridium oxide is relatively large, and the utilization rate of iridium is relatively low at tens of nanometers; It will hinder the contact between hydrogen and platinum, reducing the catalytic effect of platinum on the HOR reaction of the battery

Method used

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  • Preparation method of antipolar alloy catalyst for fuel cell
  • Preparation method of antipolar alloy catalyst for fuel cell
  • Preparation method of antipolar alloy catalyst for fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh 100 mg of chloroplatinic acid and 61.86 mg of iridium chloride into a three-necked flask, add 100 ml of ethylene glycol, stir ultrasonically to dissolve them completely, and adjust the pH of the solution to 11 with 1M sodium hydroxide solution.

[0039](2) Start heating under the protection of nitrogen, heat to a temperature of 140° C., react for 3 hours to obtain a black platinum-iridium colloid, and cool down.

[0040] (3) Select 74.79 mg of VXC72 carbon carrier from Carbot Corporation of the United States to prepare a carbon carrier solution, and the concentration of the carbon carrier solution is 1 mg C / ml (异丙醇) .

[0041] (4) After the platinum-iridium colloid was lowered to room temperature, it was mixed with the VXC72 carbon carrier solution, stirred and ultrasonicated for 2 hours, so that the platinum-iridium alloy was evenly loaded on the carbon carrier, and a PtIr / C solution was obtained.

[0042] (5) Suction filter the above solution, wash with a...

Embodiment 2

[0044] (1) Weigh 100 mg of chloroplatinic acid and 61.86 mg of iridium chloride into a three-necked flask, add 100 ml of ethylene glycol, stir ultrasonically to dissolve them completely, and adjust the pH of the solution to 11 with 1M sodium hydroxide solution.

[0045] (2) Heating was started under the protection of nitrogen, heated to a temperature of 150° C., and reacted for 5 hours to obtain a black platinum-iridium colloid, and the temperature was lowered.

[0046] (3) Put 74.79 mg of Ketjen Black EC300J carbon carrier from Lion King of Japan into a high-temperature tube furnace, perform graphitization treatment at a high temperature of 1600 °C for 3 hours under the protection of nitrogen, and cool down to room temperature for use.

[0047] (4) The carbon carrier after the graphitization treatment is formulated into a carbon carrier solution, and the concentration of the carbon carrier solution is 1 mg C / ml (乙醇+水) .

[0048] (5) After the platinum-iridium colloid is lo...

Embodiment 3

[0051] (1) Weigh 150 mg of chloroplatinic acid and 30.93 mg of iridium chloride into a three-necked flask, add 100 ml of ethylene glycol, stir ultrasonically to dissolve them completely, and adjust the pH of the solution to 12 with 1M sodium hydroxide solution.

[0052] (2) Heating was started under the protection of nitrogen, and the temperature was heated to 160° C., and reacted for 5 hours to obtain black platinum-iridium colloid, and the temperature was lowered.

[0053] (3) Put 299.16 mg of Ketjen Black EC600J carbon carrier from Lion King of Japan into a high-temperature tube furnace, conduct graphitization treatment at 1600°C for 3 hours under nitrogen protection, and cool down to room temperature for use.

[0054] (4) The carbon carrier after the graphitization treatment is formulated into a carbon carrier solution, and the concentration of the carbon carrier solution is 5 mg C / ml (乙醇+异丙醇) .

[0055] (5) After the platinum-iridium colloid was lowered to room tempera...

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Abstract

The preparation method comprises the following steps: mixing and uniformly stirring a platinum precursor, an iridium precursor and ethylene glycol to obtain a mixed solution, then adding alkali into the mixed solution, adjusting the pH value of the solution to be alkaline, heating and reacting under the protection of nitrogen, after the reaction is finished, cooling to room temperature, filtering, washing, and drying to obtain the anti-reverse-pole alloy catalyst for the fuel cell. Platinum-iridium colloid is obtained; selecting a carbon carrier, and fully dispersing the carbon carrier to obtain a carbon carrier solution; mixing the platinum-iridium colloid with the carbon carrier solution, stirring and carrying out ultrasonic treatment to obtain a loaded PtIr / C catalyst solution; and carrying out suction filtration, vacuum drying and grinding on the PtIr / C catalyst solution, and then carrying out annealing treatment at a certain temperature to obtain a PtIr / C alloy catalyst solid with anti-polarity reversal capability. The preparation method of the catalyst is improved on the basis of a very mature polyhydric alcohol reduction method, and the catalyst is simple in preparation process, mild in reaction, safe, non-toxic and easy for large-scale production.

Description

technical field [0001] The invention belongs to the field of fuel cell anode catalysts, in particular to a method for preparing an anode catalyst used for fuel cell anti-reversal. Background technique [0002] Fuel cells have the advantages of high energy conversion efficiency because they are not limited by the Carnot cycle. Because the fuel is hydrogen and air, and the product is only water, it has the advantage of being environmentally friendly. Therefore, it has become a very promising energy conversion device, especially for Cars, ships, planes and other large vehicles. However, for fuel cell vehicles, due to start-stop or uneven distribution of hydrogen fuel in the flow field, the anode of one or more membrane electrodes in the stack will lack the required hydrogen. At this time, due to the lack of hydrogen, the hydrogen oxidation reaction of the anode will The hydrogen protons and electrons generated by (HOR) are not enough to satisfy the oxygen reduction reaction (O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCH01M4/8825H01M4/8803Y02E60/50
Inventor 赵宏杨向雨
Owner QINGDAO CHUANGQI XINNENG CATALYSIS TECH CO LTD
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