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Catalyst carrier for fuel cell, catalyst and preparation method of catalyst carrier

A catalyst carrier and fuel cell technology, applied in battery electrodes, carbon preparation/purification, circuits, etc., can solve problems such as high concentration polarization and ohmic polarization

Inactive Publication Date: 2021-05-28
浙江高成绿能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, carbon corrosion can also lead to large changes in electrode morphology. Carbon corrosion caused by local hydrogen starvation leads to the collapse of the entire electrode porous structure, which prevents gas and water from entering the catalytic layer, resulting in higher concentration polarization and ohmic polarity. change

Method used

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  • Catalyst carrier for fuel cell, catalyst and preparation method of catalyst carrier
  • Catalyst carrier for fuel cell, catalyst and preparation method of catalyst carrier
  • Catalyst carrier for fuel cell, catalyst and preparation method of catalyst carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 0.5g of carbon carrier Vulcan XC72R into a beaker, add 0.4g of 5wt% metavanadate ammooxalic acid solution, 30g of 10wt% ethanol aqueous solution, sonicate for 20min, and stir with a glass rod; after the end, stir the beaker on a magnetic stirrer for 90min at room temperature , and finally settled overnight, filtered with suction, air-dried at 80°C for 60 minutes, and calcined at 300°C for 60 minutes to finally obtain the desired composite carrier.

[0039] Preparation of composite oxide supported platinum catalyst by liquid phase reduction method: 0.3g of composite carrier, 2.7g of 20wt% chloroplatinic acid aqueous solution, and 18g of ethylene glycol were placed in a three-necked flask, ultrasonically dispersed for 20min, and then 2.7g of sodium hydroxide was added, 0.3 g formaldehyde, stirred and reacted at 80°C for 300min in a water bath, cooled and settled after the reaction, filtered, dried at 100°C for 120min, and finally obtained the desired 40% Pt / VOx-C cat...

Embodiment 2

[0041] Weigh 0.5g of carbon carrier Vulcan XC72R into a beaker, add 0.6g of 5wt% metavanadate ammooxalic acid solution, 30g of 10wt% ethanol aqueous solution, sonicate for 20min, and stir with a glass rod; after the end, stir the beaker on a magnetic stirrer for 90min at room temperature , and finally settled overnight, filtered with suction, air-dried at 80°C for 60 minutes, and calcined at 300°C for 60 minutes to finally obtain the desired composite carrier.

[0042] Preparation of composite oxide supported platinum catalyst by liquid phase reduction method: 0.3g of composite carrier, 2.7g of 20wt% chloroplatinic acid aqueous solution, and 18g of ethylene glycol were placed in a three-necked flask, ultrasonically dispersed for 20min, and then 2.7g of sodium hydroxide was added, 0.3 g formaldehyde, stirred and reacted at 80°C for 300min in a water bath, cooled and settled after the reaction, filtered, dried at 100°C for 120min, and finally obtained the desired 40% Pt / VOx-C cat...

Embodiment 3

[0044] Weigh 0.5g of carbon carrier BP2000 into a beaker, add 0.9g of 5wt% metavanadate ammooxalic acid solution, 30g of 10wt% ethanol aqueous solution, ultrasonicate for 20min, and stir with a glass rod; after the end, stir the beaker on a magnetic stirrer for 90min at room temperature, Finally, settle overnight, filter with suction, air-dry at 80°C for 60 minutes, and bake at 300°C for 60 minutes to obtain the desired composite carrier.

[0045] Preparation of composite oxide supported platinum catalyst by liquid phase reduction method: 0.3g of composite carrier, 2.7g of 20wt% chloroplatinic acid aqueous solution, and 18g of ethylene glycol were placed in a three-necked flask, ultrasonically dispersed for 20min, and then 2.7g of sodium hydroxide was added, 0.3 g formaldehyde, stirred and reacted at 80°C for 300min in a water bath, cooled and settled after the reaction, filtered, dried at 100°C for 120min, and finally obtained the desired 40% Pt / VOx-C catalyst.

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Abstract

The invention relates to a catalyst carrier for a fuel cell, a catalyst and a preparation method thereof, and the catalyst carrier is prepared by the following steps: adding a carbon carrier into a mixed solution, and then sequentially carrying out ultrasonic dispersion, stirring, sedimentation, suction filtration, drying and roasting to obtain the catalyst carrier for the fuel cell, wherein the mixed solution is a mixture of an oxalic acid solution containing a vanadium precursor and an ethanol water solution. According to the prepared composite carrier, the vanadium oxide with the advantage of acid and alkali resistance is adopted, conversion among vanadium ions with different valence states is preferentially carried out at high potential, carbon corrosion is slowed down, and the durability of the catalyst is improved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a catalyst carrier for a fuel cell, a catalyst and a preparation method thereof. Background technique [0002] PEMFC as a H 2 for fuel, O 2 The fuel cell as an oxidant has the advantages of zero emission, high efficiency, fast start-up, and low-temperature operation. It can be used as a power source in automobiles, aerospace, drones, etc., and can also be used in distributed power generation and household combined heat and power supply. , Standby power supply and other fields; PEMFC is mainly composed of MEA, bipolar plate, collector plate and end plate. Among them, the MEA is the place where the catalytic reaction occurs and is the core component of the PEMFC. It consists of a catalytic layer, a proton exchange membrane and a gas diffusion layer. [0003] The durability of PEMFC is closely related to the durability of the appealing components; the catalyst is the place whe...

Claims

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Application Information

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IPC IPC(8): C01G31/02C01B32/05B22F9/24B22F1/00H01M4/92
CPCB22F1/0007C01G31/02C01B32/05B22F9/24H01M4/926H01M4/921C01P2006/40Y02E60/50
Inventor 宁星杰侯向理姚宇希
Owner 浙江高成绿能科技有限公司
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