Anti-antipolar PtIr/CNT catalyst for proton exchange membrane fuel cell and preparation method of anti-antipolar PtIr/CNT catalyst

A proton exchange membrane and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of battery initial performance decline, poor conductivity of oxides, additional preparation, etc., to improve reverse electrode tolerance, good The effect of simple performance and preparation method

Pending Publication Date: 2021-07-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst provided by this invention is an anti-reversal additive, which needs to be added to the anode catalyst, and the anti-reversal additive needs to be prepared additionally and requires high temperature. In addition, due to the poor conductivity of the oxide, the initial performance of the battery will be significantly reduced.

Method used

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  • Anti-antipolar PtIr/CNT catalyst for proton exchange membrane fuel cell and preparation method of anti-antipolar PtIr/CNT catalyst
  • Anti-antipolar PtIr/CNT catalyst for proton exchange membrane fuel cell and preparation method of anti-antipolar PtIr/CNT catalyst
  • Anti-antipolar PtIr/CNT catalyst for proton exchange membrane fuel cell and preparation method of anti-antipolar PtIr/CNT catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take 1 g of carbon nanotubes and disperse them in a mixed acid solution with a volume ratio of concentrated sulfuric acid and concentrated nitric acid of 3:1 (the total volume is 200 mL). The concentrated sulfuric acid and concentrated nitric acid used are both commercially available concentrated sulfuric acid and concentrated nitric acid. Heat for 3 hours, add a large amount of deionized water to filter and wash until the pH is 7.0, and dry in an oven.

[0043]Take 155 mg of acid-treated carbon nanotubes and add them to a three-necked flask, add 20 mL of deionized water and 20 mL of ethylene glycol, ultrasonically disperse for 30 min, then add 3.7 mg / mL of chloroplatinic acid and 2.7 mg / mL of iridium trichloride, so that The molar ratio of Pt and Ir is 3:1, and the total metal molarity is 0.2mM. Then nitrogen is passed through to remove oxygen for 30min, and then the pH is adjusted to above 10 with 2mol / L NaOH solution. Move the three-necked flask to an oil bath at 140...

Embodiment 2

[0056] Take 1 g of carbon nanotubes and disperse them in a mixed acid solution with a volume ratio of concentrated sulfuric acid and concentrated nitric acid of 3:1. The deionized water was filtered and washed until the pH was 7.0, and dried in an oven.

[0057] Take 155 mg of acid-treated carbon nanotubes and put them into a three-necked flask, add 20 mL of deionized water and 20 mL of ethylene glycol with a volume ratio of 1:1 (40 mL in total), ultrasonically disperse for 30 min, and then add 3.7 mg / mL of chlorine Platinic acid and 2.7mg / mL iridium trichloride, so that the molar ratio of Pt and Ir is 2:1, and the total metal molar weight is 0.2mM chloroplatinic acid and iridium trichloride, followed by nitrogen deoxygenation for 30min, Then adjust the pH to above 10 with 2mol / L NaOH solution. Move the three-necked flask to an oil bath at 140°C and heat it for 10 hours. During this period, nitrogen gas is kept flowing. After the reaction is completed, it is naturally cooled ...

Embodiment 3

[0061] Take 1 g of carbon nanotubes and disperse them in a mixed acid solution with a volume ratio of concentrated sulfuric acid and concentrated nitric acid of 3:1. The deionized water was filtered and washed until the pH was 7.0, and dried in an oven.

[0062] Take 155 mg of acid-treated carbon nanotubes and put them into a three-necked flask, add 20 mL of deionized water and 20 mL of ethylene glycol with a volume ratio of 1:1 (40 mL in total), ultrasonically disperse for 30 min, and then add 3.7 mg / mL of chlorine Platinic acid and 2.7mg / mL iridium trichloride, so that the molar ratio of Pt and Ir is 6:1, the total metal molar weight is 0.2mM chloroplatinic acid and iridium trichloride, followed by nitrogen deoxygenation for 30min, Then adjust the pH to above 10 with 2mol / L NaOH solution. Move the three-necked flask to an oil bath at 140°C and heat it for 10 hours. During this period, nitrogen gas is kept flowing. After the reaction is completed, it is naturally cooled to r...

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Abstract

The invention provides an anti-antipolar anode catalyst for a proton exchange membrane fuel cell, the anti-antipolar anode catalyst takes a PtIr alloy as an active component and takes a carbon nanotube as a carrier, and the molar ratio of Pt to Ir is (6-1): 1; when the anode catalyst provided by the invention is used for the anode catalyst layer of the fuel cell, an anti-reverse pole additive does not need to be additionally added, agglomeration caused by direct addition of iridium oxide or iridium is avoided, good performance can be maintained after frequent reverse pole of the fuel cell occurs, and the reverse pole tolerance performance of a membrane electrode is remarkably improved.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a fuel cell anti-reversal anode catalyst and a preparation method thereof, which can effectively alleviate the adverse effects caused by frequent electrode reversals during battery operation, thereby prolonging the durability and service life of the battery. Background technique [0002] Due to its high efficiency, quietness, and pollution-free characteristics, proton exchange membrane fuel cells have been developed rapidly in recent years, but durability is still an obstacle to its large-scale commercialization. During the operation of the fuel cell, the battery voltage reversal phenomenon caused by insufficient fuel supply occurs. In this case, the anode voltage rises rapidly above 1.5 V, and the carbon carrier and water electrolysis are forced to occur to maintain the current balance. At this time, the potential of the anode is higher than the potential of the cathode, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/921H01M4/926H01M4/8825H01M2004/8684Y02E60/50
Inventor 宋微李咏焕姜广俞红梅邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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