Supported PtRu alloy catalyst and preparing method thereof

An alloy catalyst and a supported technology are applied in the field of supported PtRu alloy catalyst and its preparation, which can solve problems such as large environmental impact, achieve the effects of uniform distribution, improve crystallinity, and improve the ability to resist CO poisoning

Inactive Publication Date: 2008-07-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of toxic non-aqueous solvents in th

Method used

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  • Supported PtRu alloy catalyst and preparing method thereof
  • Supported PtRu alloy catalyst and preparing method thereof
  • Supported PtRu alloy catalyst and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1 g of chloroplatinic acid hydrate (H 2 PtCl6 xH 2 O) (37% by mass of metal Pt) and 0.5g of ruthenium trichloride hydrate (37% by mass of metal Ru) were added to 25ml of ethylene glycol, and stirred evenly to form a mixed metal solution. Add 0.370g of carbon black into 100g of ethylene glycol, stir to disperse evenly, and form a carrier solution. NaOH solution was added dropwise to the mixed metal solution to adjust the pH value of the solution to 13. Put the above solution in an oil bath, raise the temperature to 180°C and keep it for 30 minutes, then lower it to 170°C and keep it for 3 hours, the metal is reduced and a black catalyst colloid solution is formed. Add the carrier solution to the catalyst colloidal solution, mix well, and adjust the pH of the solution to 3 with hydrochloric acid, then filter, wash with deionized water, and dry at 80°C in vacuum. The obtained catalyst was treated in a tube furnace at 200° C. for 2 hours with hydrogen-argon mixed gas wit...

Embodiment 2

[0045] 1 g of chloroplatinic acid hydrate (H 2 PtCl6 xH 2 O) (37% by mass of metal Pt) and 0.5g of ruthenium trichloride hydrate (37% by mass of metal Ru) were added to 25ml of ethylene glycol, and stirred evenly to form a mixed metal solution. Add 0.140g of carbon black into 100g of ethylene glycol, stir to disperse evenly, and form a carrier solution. NaOH solution was added dropwise to the mixed metal solution to adjust the pH value of the solution to 13. Put the above solution in an oil bath, raise the temperature to 180°C and keep it for 30 minutes, then lower it to 170°C and keep it for 3 hours, the metal is reduced and a black catalyst colloid solution is formed. Add the carrier solution to the catalyst colloidal solution, mix well, and adjust the pH of the solution to 3 with hydrochloric acid, then filter, wash with deionized water, and dry at 80°C in vacuum. The obtained catalyst was treated in a tube furnace at 200° C. for 2 hours with hydrogen-argon mixed gas wit...

Embodiment 3

[0047] The catalyst preparation process is the same as in Example 1. The heat treatment condition is to treat at 200° C. for 30 minutes in a hydrogen-argon mixed gas with a hydrogen fraction of 10%.

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Abstract

The preparation of a supported PtRu alloying catalyst is realized by the following steps: First, the precursor solutions of Pt and Ru are mixed to prepare a metal salt solution, then the pH value of the solution is adjusted, and the solution is heated, so as to obtain a catalyst colloidal solution. Carriers are dispersed to a solution and mixed with the catalyst colloidal solution, and then the pH value of the mixed solution is adjusted for facilitating the deposition of the catalyst colloidal particles on the carriers. The catalyst is filtered, washed and heat treated in a reducing atmosphere with appropriate proportions to obtain the supported PtRu alloying catalyst. The invention improves the crystallinity of PtRu catalyst by combing the polyol method and heat treating in a reducing atmosphere, removes adsorption species on the catalyst surface effectively during polyol method process and also improves the methanol oxidability and the resistance of CO poisoning of alloying catalyst.

Description

technical field [0001] The invention relates to fuel cell technology, in particular to a supported PtRu alloy catalyst and a preparation method thereof. Background technique [0002] Direct methanol fuel cell (DMFC) is an electrochemical reaction device that directly converts the chemical energy of fuel (methanol) into electrical energy. It has the advantages of high theoretical energy density, simple structure, and environmental friendliness. It is used in electronic equipment and portable power supplies. with broadly application foreground. [0003] However, one of the main technical challenges currently hindering the commercialization of DMFCs is the slow electrocatalytic oxidation rate of methanol at low temperatures (<100 °C), and the noble metal catalysts are easily poisoned by CO intermediates, resulting in unsatisfactory battery performance and service life. Therefore, the research and development of highly active methanol oxidation catalysts and the improvement ...

Claims

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Application Information

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IPC IPC(8): B01J37/02B01J23/40H01M4/90H01M4/92
CPCY02E60/50Y02P70/50B01J23/42B01J23/462B01J35/023B01J37/0018H01M4/921H01M8/1011
Inventor 孙公权闫世友辛勤朴灿镐朱相熏张
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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