Preparation method of imidazole type dinitrile amine salt ionic liquid functionalized graphene supported platinum catalyst

A technology of methylimidazole dinitrile amine salt and ionic liquid, which is applied in the field of preparation of imidazole-type dinitrile amine salt ionic liquid functionalized graphene-supported platinum catalyst, which can solve the problem of reducing Pt catalytic activity, high price, and restricting the commercialization of DMFC Application and other issues

Active Publication Date: 2020-09-25
XINJIANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Platinum (Pt)-based catalysts are important catalysts in DMFCs, but Pt resources are scarce and expensive, and Pt easily adsorbs methanol oxidation intermediate products (mainly CO) to poison and deactivate them, thus greatly reducing the catalytic activity of Pt. Restricts the commercial application of DMFC

Method used

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  • Preparation method of imidazole type dinitrile amine salt ionic liquid functionalized graphene supported platinum catalyst
  • Preparation method of imidazole type dinitrile amine salt ionic liquid functionalized graphene supported platinum catalyst
  • Preparation method of imidazole type dinitrile amine salt ionic liquid functionalized graphene supported platinum catalyst

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Experimental program
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Embodiment 1

[0017] First, weigh 0.02 g of 1-ethyl-3-methylimidazole dinitrile amine salt emimN(CN) 2 and 0.04 g GO were placed in a round bottom flask, and 40 mL deionized water was added, and ultrasonically dispersed for 60 min. Subsequently, sequentially add 1 mL of 0.05 mol·L -1 Chloroplatinic acid (H 2 PtCl 6 •6H 2 O) solution and 0.4 mL 0.4 mol·L -1 Potassium hydroxide (KOH) aqueous solution was magnetically stirred for 3 h. Finally, 15 mL of 4 mg•mL was added dropwise -1 NaBH 4 , and continued magnetic stirring for 12 h, the obtained target product was fully washed with deionized water and absolute ethanol, and vacuum-dried at 60°C for 12 h to obtain imidazole-type dinitrile amine salt ionic liquid functionalized graphene-supported platinum catalyst Pt / emimN (EN) 2 / rGO.

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Abstract

The present invention adopts a one-pot room-temperature reduction method to prepare an imidazole type dinitrile amine salt ionic liquid functionalized graphene supported platinum catalyst with excellent electro-catalytic performance. The method is characterized by selecting the reduced graphene oxide (rGO) with large specific surface area and better electrochemical performance as a carrier; through non-covalent functionalization, giving the more excellent conductivity to the reduced graphene oxide (rGO), and taking chloroplatinic acid as a platinum source and taking sodium borohydride as a reducing agent to prepare the imidazole type dinitrile amine salt ionic liquid functionalized graphene supported platinum catalyst. The prepared catalyst has good methanol oxidation electrocatalytic activity, carbon monoxide poisoning resistance and stability, so that the method has certain reference significance for the development, research and application of a direct methanol fuel cell anode catalyst.

Description

technical field [0001] The invention relates to a preparation method of an imidazole-type dinitrile amine salt ionic liquid functionalized graphene-supported platinum catalyst. Background technique [0002] Direct methanol fuel cell (DMFC) is a new type of fuel cell, which has many advantages such as not being constrained by the Carnot cycle, high energy conversion efficiency, simple system design, convenient storage of liquid fuel, and low pollution emissions. It is used in automobiles, military and small Portable electronic devices and other fields have broad application prospects. Platinum (Pt)-based catalysts are important catalysts in DMFCs, but Pt resources are scarce and expensive, and Pt easily adsorbs methanol oxidation intermediate products (mainly CO) to poison and deactivate them, thus greatly reducing the catalytic activity of Pt. This restricts the commercial application of DMFC. Therefore, improving the activity, anti-CO poisoning performance, and stability ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M8/1011B01J31/02
CPCH01M4/926H01M8/1011B01J31/0281Y02E60/50Y02P70/50
Inventor 王瑞英杨莉莉
Owner XINJIANG UNIVERSITY
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