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Preparation method of PdRh alloy electrocatalyst for fuel cell and application

An electrocatalyst and fuel cell technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve problems such as low yield and complexity, and achieve the effects of less energy consumption, accelerated release, and economical efficiency

Active Publication Date: 2019-11-05
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the method of synthesizing catalysts with complex morphology is relatively complicated, and the yield is not high. It may be necessary to use template method to prepare nanoparticles with complex morphology, so that crystals grow anisotropically on the surface.

Method used

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  • Preparation method of PdRh alloy electrocatalyst for fuel cell and application
  • Preparation method of PdRh alloy electrocatalyst for fuel cell and application
  • Preparation method of PdRh alloy electrocatalyst for fuel cell and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Weigh 0.5 g of P123 into a 50 ml beaker, add 25 ml H 2 O, ultrasonically stir to dissolve, pipette 0.1ml of 0.5M PEI solution into the mixed solution with a pipette gun, after ultrasonically mixing evenly, then add 2ml of 37% formaldehyde solution, and carry out magnetic stirring with a certain intensity at room temperature.

[0038] (2) Weigh 9.79 mg K respectively 2 PdCl 4 and 6.28 mg RhCl 3 to a 25 ml beaker, add 15 ml H to the beaker 2 O, after ultrasonic mixing, use a constant pressure dropping funnel to control the flow rate of one drop per second to drop into the mixed solution A, and carry out magnetic stirring at a certain intensity at room temperature, after stirring for 0.5 h.

[0039] (3) Transfer the mixed solution to a polytetrafluoroethylene reactor, maintain the oven reaction temperature at 120 °C, and keep the temperature for 12 h.

[0040] (4) Naturally cool to room temperature, keep standing, and centrifuge the black turbid liquid obtained aft...

Embodiment 2

[0045] Weigh 0.5 g of P123 into a 50 ml beaker, add 25 ml H 2 O, ultrasonically stir to dissolve, pipette 0.1ml of 0.5M PEI solution into the mixed solution with a pipette gun, after ultrasonically mixing evenly, then add 2ml of 37% formaldehyde solution, and carry out magnetic stirring with a certain intensity at room temperature.

[0046] (2) Weigh 9.79 mg K respectively 2 PdCl 4 and 2.10 mg RhCl 3 into a 25 ml beaker, add 15 ml H to the beaker 2 O, after ultrasonic mixing, use a constant pressure dropping funnel to control the flow rate of one drop per second to drop into the mixed solution A, and carry out magnetic stirring at a certain intensity at room temperature, after stirring for 0.5 h.

[0047] (3) Transfer the mixed solution to a polytetrafluoroethylene reactor, maintain the oven reaction temperature at 120 °C, and keep the temperature for 12 h.

[0048] (4) Naturally cool to room temperature, keep standing, and centrifuge the black turbid liquid obtained after...

Embodiment 3

[0053] (1) Weigh 0.5 g of P123 into a 50 ml beaker, add 25 ml H 2 O, ultrasonic stirring to dissolve, pipette 0.1ml 0.5M PEI solution into the mixed solution with a pipette gun, after ultrasonic mixing evenly, then add 2ml 37% formaldehyde solution, and carry out magnetic stirring with a certain intensity at room temperature.

[0054] (2) Weigh 9.79 mg K respectively 2 PdCl 4 and 18.83 mg RhCl 3 into a 25 ml beaker, add 15 ml H to the beaker 2 O, after ultrasonic mixing, use a constant pressure dropping funnel to control the flow rate of one drop per second to drop into the mixed solution A, and carry out magnetic stirring at a certain intensity at room temperature, after stirring for 0.5 h.

[0055] (3) Transfer the mixed solution to a polytetrafluoroethylene reactor, maintain the oven reaction temperature at 120 °C, and keep the temperature for 12 h.

[0056] (4) Naturally cool to room temperature, keep standing, and centrifuge the black turbid liquid obtained after the ...

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Abstract

The invention provides a preparation method of a PdRh alloy electrocatalyst for a fuel cell, and the method comprises the following steps: weighing P123, dissolving the P123 in deionized water, addinga complexing agent PEI, performing stirring, and adding a formaldehyde solution to obtain a mixed solution A; dissolving potassium chloropalladate and rhodium chloride powder in deionized water to obtain an orange-yellow solution B; dropwise adding the orange-yellow solution B into the mixed solution A, and obtaining a precursor solution after the solution is completely changed into a grey blackturbid solution; transferring the precursor liquid into a polytetrafluoroethylene high-pressure reaction kettle at room temperature, and putting the polytetrafluoroethylene high-pressure reaction kettle into a drying oven for reaction; after the reaction is finished, performing the natural cooling to the room temperature, and performing centrifugal washing to obtain the fuel cell PdRh alloy electrocatalyst. According to the method, the PEI is used as a complexing agent and complexed with precursor ions, so the reaction rate is decreased, and the anisotropic growth of the PdRh alloy has a moreopen structure. The prepared alloy catalyst has good methanol oxidation performances, and has a wide development prospect in direct methanol fuel cells.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a method for preparing an anode catalyst, in particular to a method for preparing a PdRh alloy electrocatalyst for a direct methanol fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC), as the main power source of electric vehicles in the future, is an important way to alleviate energy crisis and environmental problems. Due to the characteristics of high efficiency, high energy density and zero emission, PEMFC has been successfully applied to mobile power sources such as electric vehicles and notebook computers and mobile phones. Platinum (Pt), as an efficient catalyst, has been widely used in many important fields such as direct methanol fuel cells (DMFC). However, intrinsic properties of platinum, such as high price, scarcity, and susceptibility to poisoning by carbon-containing intermediates, pose major challenges to the further development of...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M8/1011B82Y30/00
CPCH01M4/921H01M8/1011B82Y30/00Y02E60/50
Inventor 张荣华胡青云陈迪周新文郭逸飞
Owner CHINA THREE GORGES UNIV
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