Fuel cell anti-reversal catalyst and preparation method thereof

A catalyst and nano-catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of lack of precious metals, hindering the commercial application of proton exchange membrane catalyst layer additives, and high cost, to alleviate carbon carrier corrosion, easy to implement, The effect of reducing dosage

Active Publication Date: 2020-04-17
SHENZHEN GENERAL HYDROGEN ENERGY TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the lack of precious metals in the above-mentioned oxygen evolution catalysts and the high cost have hindered their commercial application as additives in the catalytic layer of proton exchange membranes.

Method used

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  • Fuel cell anti-reversal catalyst and preparation method thereof
  • Fuel cell anti-reversal catalyst and preparation method thereof
  • Fuel cell anti-reversal catalyst and preparation method thereof

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Experimental program
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preparation example Construction

[0042] see figure 2 , figure 2 It is a schematic flow diagram of an embodiment of the preparation method of the anti-reversal catalyst of the present invention. It should be noted that the preparation method of the present invention can prepare the above-mentioned catalyst. For a detailed description of the relevant content, please refer to the content of the above-mentioned catalyst. Let me tell you more. The method includes:

[0043] Step S101: providing a niobium-doped titania carrier and iridium oxide.

[0044] Step S102: Loading iridium oxide on a niobium-doped titania carrier to obtain an iridium oxide-composite niobium-doped titania nanocatalyst.

[0045] There are many existing methods and methods for providing niobium-doped titania carrier and iridium oxide, which will not be repeated here. The niobium-doped titania carrier and the iridium oxide are mixed together, and the iridium oxide composite niobium-doped titania nanometer catalyst can be prepared through r...

Embodiment 1

[0071] (1)Nb 0.05 Ti 0.95 o 2 Preparation of the carrier:

[0072] Add 10mL of anhydrous acetic acid into 40mL of absolute ethanol and stir for 5min, add 10.62mL of tetraisopropyl titanate and 0.4738mL of niobium ethoxide to the above solution, stir and age at 80°C for 12h, then dry in an oven at 120°C for 2h, grind Refinement, heat treatment at 700°C for 4 hours in a mixed atmosphere with a hydrogen:argon volume ratio of 1:8, and a total gas flow rate of 500mL / min, then naturally cool in a mixed atmosphere, take out the sample, grind and refine, and obtain the carrier Nb 0.05 Ti 0.95 o 2 .

[0073] (2) 20% loading of IrOx loaded on Nb 0.05 Ti 0.95 o 2 Preparation of the catalyst:

[0074] Measure 19.23mL IrCl 3 solution, add 30mL ethylene glycol, ultrasonically disperse for 20min, stir for 40min, add 2M NaOH solution to the above solution to adjust the pH to 12, then add 0.8g Nb 0.05 Ti 0.95 o 2 , vigorously stirred for 1 h, and the above reactant was refluxed at...

Embodiment 2

[0076] (1)Nb 0.2 Ti 0.8 o 2 Preparation of the carrier:

[0077] Add 10mL of anhydrous acetic acid into 40mL of absolute ethanol and stir for 5min, add 10.62mL of tetraisopropyl titanate and 2.2505mL of niobium ethoxide to the above solution, stir and age at 80°C for 12h, then dry in an oven at 120°C for 2h, grind Refinement, heat treatment at 700°C for 4 hours in a mixed atmosphere with a hydrogen:argon volume ratio of 1:8, and a total gas flow rate of 500mL / min, then naturally cool in a mixed atmosphere, take out the sample, grind and refine, and obtain the carrier Nb 0.2 Ti 0.8 o 2 .

[0078] (2) 20% loading of IrOx loaded on Nb 0.2 Ti 0.8 o 2 Preparation of the catalyst:

[0079] Measure 19.23mL IrCl 3 solution, add 30mL ethylene glycol, ultrasonically disperse for 20min, stir for 40min, add 2M NaOH solution to the above solution to adjust the pH to 12, then add 0.8g Nb 0.2 Ti 0.8 o 2 , vigorously stirred for 1 h, and the above reactant was refluxed at 140° C....

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Abstract

The invention discloses a fuel cell anti-reversal catalyst and a preparation method thereof, wherein the catalyst comprises an iridium oxide composite niobium doped titanium dioxide nano catalyst, andniobium doped titanium dioxide is a carrier. According to the technical scheme, the catalyst capable of effectively relieving carbon carrier corrosion and platinum particle agglomeration growth during fuel cell anode side reversal generation can be obtained, so that the fuel cell anti-reversal time is prolonged.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a fuel cell anti-reverse catalyst and a preparation method of the fuel cell anti-reverse catalyst. Background technique [0002] A fuel cell is an electrochemical energy conversion system whose main principle is to convert the chemical energy in fuel and oxidant directly into electrical energy through oxidation-reduction reactions. As an important branch of the fuel cell field, proton exchange membrane fuel cells not only have the general characteristics of fuel cells, but also have outstanding advantages such as high specific power, fast start-up speed at room temperature, and long life. [0003] Due to these outstanding advantages, the proton exchange membrane fuel cell stack can be used as a power source for vehicles. During the operation of proton exchange membrane fuel cells for vehicles, there will be the following operating conditions: start and stop, idle speed, high p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9016H01M4/9075Y02E60/50
Inventor 廖建华曾林赵志亮尧克光冯其王亚蒙陈会兵
Owner SHENZHEN GENERAL HYDROGEN ENERGY TECH CORP LTD
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