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A kind of ionic liquid electrolyte and preparation method, alloy and preparation method and application

An ionic liquid and electrolyte technology, applied in electrolysis components, electrolysis process, electrodes, etc., to achieve the effect of good long-term stability, efficient catalytic oxygen reduction reaction, and high electrochemical active area

Active Publication Date: 2021-12-24
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defect that there is no ionic liquid electrolyte in the prior art that can be applied to the preparation of noble metal-rare earth metal alloys such as Pt-La alloys

Method used

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  • A kind of ionic liquid electrolyte and preparation method, alloy and preparation method and application
  • A kind of ionic liquid electrolyte and preparation method, alloy and preparation method and application
  • A kind of ionic liquid electrolyte and preparation method, alloy and preparation method and application

Examples

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Embodiment 1

[0069] 1. Preparation of ionic liquid electrolyte

[0070] First weigh 0.28mmol of La(TSFI) 3 , and 0.28 mmol of H 2 PtCl 6Place in a reaction flask, then add 7ml of [BMIM]TSFI ionic liquid, and stir magnetically at 80°C for 0.5h to La(TSFI) 3 and H 2 PtCl 6 Fully dissolved. Among them, the La(TSFI) in the ionic liquid electrolyte 3 The concentration is 0.04mol / L, H 2 PtCl 6 The concentration is 0.04mol / L.

[0071] 2. Preparation of Pt-La alloy

[0072] A three-electrode system is adopted: glassy carbon as the working electrode, platinum sheet as the counter electrode, and platinum wire as the reference electrode. The pretreatment of the working electrode is to sequentially polish and polish the deerskin surface dispersed with 500nm, 300nm, and 50nm alumina polishing powder, then rinse with deionized water and ethanol in sequence, and then ultrasonicate in deionized water. The pretreatment of the electrode and the reference electrode is to use metallographic sandpap...

Embodiment 2

[0076] 1. Preparation of ionic liquids

[0077] First weigh 0.28mmol of La(TSFI) 3 , and 0.84 mmol of H 2 PtCl 6 Place in a reaction flask, then add 7mL of [BMIM]TSFI ionic liquid, and stir magnetically at 80°C for 0.5h to La(TSFI) 3 and H 2 PtCl 6 Fully dissolved. Among them, the La(TSFI) in the ionic liquid electrolyte 3 The concentration is 0.04mol / L, H 2 PtCl 6 The concentration is 0.12mol / L.

[0078] 2, the preparation of Pt-La alloy is the same as embodiment 1

[0079] The molar ratio of Pt to La in the Pt—La alloy obtained in this example is 3.1:1.

[0080] figure 1 Among a is the La(TSFI) in the present embodiment 3 The cyclic voltammogram, b is H in the present embodiment 2 PtCl 6 The cyclic voltammogram. figure 2 It is the constant potential deposition performed when preparing the Pt-La alloy in this embodiment. image 3 It is a scanning electron microscope image of the Pt-La alloy prepared in this example, and it can be seen from the image that the ...

Embodiment 3

[0082] 1. Preparation of ionic liquids

[0083] First weigh 0.28mmol of La(TSFI) 3 , and 1.4 mmol of H 2 PtCl 6 Place in a reaction flask, then add 7mL of [BMIM]TSFI ionic liquid, and stir magnetically at 80°C for 0.5h to La(TSFI) 3 and H 2 PtCl 6 Fully dissolved. Among them, the La(TSFI) in the ionic liquid electrolyte 3 The concentration is 0.04mol / L, H 2 PtCl 6 The concentration is 0.2mol / L.

[0084] 2, the preparation of Pt-La alloy is the same as embodiment 1

[0085] The molar ratio of Pt to La in the Pt—La alloy obtained in this example is 3.4:1.

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Abstract

The invention discloses an ionic liquid electrolyte, a preparation method, an alloy, a preparation method and application. The ionic liquid electrolyte in the present invention contains R(TSFI) 3 , soluble precious metal salts and [BMIM]TSFI, based on the volume of ionic liquid electrolyte of 1 L, in which R(TSFI) 3 , the concentrations of precious metal salts are 0.001~0.04mol / L, 0.04~0.2mol / L, respectively, where R(TSFI) 3 R in the formula is a rare earth metal. The noble metal-rare earth metal alloy can be deposited on the working electrode by means of electrodeposition in the ionic liquid electrolyte, and the method for preparing the noble metal-rare earth metal alloy by using the ionic liquid electrolyte is simple, pollution-free and recyclable. The usage of precious metals is lower, the long-term stability is higher, and the oxygen reduction performance is stronger.

Description

technical field [0001] The invention mainly relates to an ionic liquid electrolyte, a preparation method, an alloy, a preparation method and an application. Background technique [0002] A proton exchange membrane fuel cell is a device that directly converts chemical energy into electrical energy through an electrochemical reaction. The hydrogen oxidation reaction occurs at the anode, and the oxygen reduction reaction occurs at the anode. Both cell reactions require the precious metal platinum (Pt). as a catalyst. The scarcity of platinum reserves, high price, and poor long-term stability of Pt catalysts lead to the high cost of current proton exchange membrane fuel cells. [0003] In order to solve the above problems, one is to alloy Pt with other metals, mainly forming alloys with transition metals and rare earth metals, and the other is to prepare noble metal Pt into single atoms. The long-term stability of Pt alloys can be improved through the interaction with other me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/24C25C7/02C22C5/04H01M4/90H01M4/92
CPCC25C1/24C25C7/02C22C5/04H01M4/9041H01M4/921Y02P10/20Y02E60/50
Inventor 李冰巩庆华杨妮田林谢刚闫森
Owner EAST CHINA UNIV OF SCI & TECH