Preparation method of binary metal platinum-palladium prismatic catalyst and application of binary metal platinum-palladium prismatic catalyst in direct methanol fuel cell

A binary metal, prismatic technology, applied in the field of fuel cell catalysts, can solve problems such as cost waste, and achieve the effect of simple synthesis steps, high activity and durability, and simple synthesis process

Inactive Publication Date: 2022-01-18
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure alloy nanoparticles will cause a certain amount of platinum metal to be buried inside the alloy, unable to contact the reactants to play a catalytic role, resulting in waste of cost

Method used

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  • Preparation method of binary metal platinum-palladium prismatic catalyst and application of binary metal platinum-palladium prismatic catalyst in direct methanol fuel cell
  • Preparation method of binary metal platinum-palladium prismatic catalyst and application of binary metal platinum-palladium prismatic catalyst in direct methanol fuel cell
  • Preparation method of binary metal platinum-palladium prismatic catalyst and application of binary metal platinum-palladium prismatic catalyst in direct methanol fuel cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of binary metal platinum palladium prismatic catalyst, comprises the following steps:

[0029] (1) Take 0.05mmol (19.665mg) platinum acetylacetonate and 0.05mmol (15.232mg) palladium acetylacetonate as metal precursors, add them to a beaker containing 30mL of DMF and 200mg of TTAB, stir for 10-20min and mix well; then add 60mg carbon powder, ultrasonic 20min, stirring 20min to get a mixed solution;

[0030] (2) Move the mixed solution to a reaction kettle and react at 160°C for 24 hours; cool to room temperature, wash and dry to obtain a binary metal platinum palladium prismatic catalyst.

[0031] The noble metal in the prepared catalyst is in a low loading range, and the overall loading is about 20wt%.

[0032] The prepared Pt-based metal nano-prism has a shape of a prism and a size of 5-10 nm.

[0033] Characterized by low power scanning transmission electron microscope and high power scanning transmission electron microscope:

[0034] ...

Embodiment 2

[0039] A kind of preparation method of binary metal platinum palladium direct methanol fuel cell catalyst, comprises the following steps:

[0040] (1) Take 0.05mmol (25.9mg) chloroplatinic acid hexahydrate and 0.05mmol (15.232mg) palladium acetylacetonate as metal precursors, add them to a beaker containing 30mL ultrapure water, 50mgAA and 200mg TTAB, and stir for 10-20min Mix evenly; then add 60mg of carbon powder, sonicate for 20 minutes, and stir for 20 minutes to obtain a mixed solution;

[0041] (2) Move the mixed solution to a reaction kettle and react at 200°C for 16 hours; cool to room temperature, wash and dry to obtain a binary metal platinum palladium prismatic catalyst.

[0042] After electrochemical tests, the methanol oxidation activity of the obtained binary metal platinum palladium catalyst was 0.960 A·mg -1 , better than PtRu / C (0.574A mg -1 ) and standard Pt / C (0.386 A mg -1 ).

Embodiment 3

[0044] A kind of preparation method of binary metal platinum palladium direct methanol fuel cell catalyst, comprises the following steps:

[0045] (1) Take 0.05mmol (19.665mg) of platinum acetylacetonate and 0.05mmol (8.87mg) of palladium chloride as metal precursors, add them to a beaker containing 30mL of DMF and 200mg of CTAB, stir for 10-20min to mix well; then add 75mg carbon powder, ultrasonic 40min, stirring 40min to get a mixed solution;

[0046] (2) Move the mixed solution to a reaction kettle and react at 180°C for 18 hours; cool to room temperature, wash and dry to obtain a binary metal platinum palladium prismatic catalyst.

[0047] After electrochemical tests, the methanol oxidation activity of the obtained binary metal platinum-palladium catalyst was 0.980 A·mg -1 , better than PtRu / C (0.574 A mg -1 ) and standard Pt / C (0.386 A mg -1 ).

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Abstract

The invention belongs to the technical field of fuel cell catalysts, and relates to a preparation method of a binary metal platinum-palladium prismatic catalyst, which comprises the following steps: dissolving a platinum precursor and a palladium precursor in a solvent containing a reducing agent, uniformly stirring, adding a surfactant for dispersion, then adding a carbon carrier, and ultrasonically and uniformly mixing to obtain a precursor solution; and then transferring the precursor solution to a reaction kettle, carrying out hydrothermal reaction at 120-200 DEG C for 16-28 hours, cooling to room temperature, centrifuging, washing with deionized water and absolute ethyl alcohol until no impurity exists, and drying to obtain the product. The method is simple in synthesis process, easy to operate, good in repeatability, capable of being produced on a large scale, high in yield, excellent in product performance and beneficial to commercialized popularization. The synthesized platinum-palladium direct methanol fuel cell alloy catalyst has prismoid morphology, has higher activity and durability compared with commercial platinum-carbon and platinum-ruthenium-carbon, has catalytic performance obviously superior to that of a commercial Pt/C catalyst, and has good application prospect and economic value.

Description

technical field [0001] The invention belongs to the technical field of fuel cell catalysts, and relates to methanol fuel cell catalysts, in particular to a preparation method of a binary metal platinum palladium prismatic catalyst and its application to direct methanol fuel cells. Background technique [0002] Since human beings entered the modern society, the rapid development of science and technology has promoted industrialization, and the process of urbanization has been accelerating. Traditional energy sources such as coal, oil, and natural gas have been drastically reduced due to massive consumption and non-renewable energy. For the long-term happiness and development of human beings, seeking clean and renewable new energy has become a hot research topic. Fuel cells have become a promising traditional substitute in the development of new energy due to the characteristics of easily available, renewable and environmentally friendly fuels. One of the types is the direct ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M8/1011B82Y30/00B82Y40/00
CPCH01M4/921H01M4/926H01M8/1011B82Y30/00B82Y40/00Y02E60/50
Inventor 苏华能李维聪彭凯张玮琦徐谦
Owner JIANGSU UNIV
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