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Ionic liquid modified oxygen reduction reaction catalyst and preparation method thereof

A technology of ionic liquids and catalysts, applied in the field of electrochemistry, can solve problems such as slow chemical kinetics, and achieve the effects of less pollution to the environment, simple process, and simple post-treatment

Pending Publication Date: 2020-11-20
郑州中科新兴产业技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The relatively slow chemical kinetics of cathodic ORR can be improved using ionic liquids as ORR modifiers, but additional ionic liquids are still to be developed to improve it

Method used

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  • Ionic liquid modified oxygen reduction reaction catalyst and preparation method thereof
  • Ionic liquid modified oxygen reduction reaction catalyst and preparation method thereof
  • Ionic liquid modified oxygen reduction reaction catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of the oxygen reduction reaction catalyst modified by ionic liquid, it comprises the steps:

[0033] 1) Mix 20mg 60% commercial Pt / C with 4mL deionized water, and sonicate for 30-60min until uniform;

[0034] 2) Mix 4mL of isopropanol with 5mg of two ionic liquid proton-type [C 2 im][NTf 2 ], aprotic type [C 4 C 1 im][NTf 2 ] Mix, ultrasonic 30-60min until uniform;

[0035] 3) Ultrasonicate the homogeneous mixture obtained in step 1) and step 2) for 60 minutes until uniform, and dry the obtained homogeneous mixture by rotary evaporation for 1 hour at a temperature of 60°C. The obtained dried product is the ionic liquid-modified oxygen reduction reaction catalyst, as follows Denoted as Pt / C-IL1 (proton type [C 2 im][NTf 2 ]), Pt / C-IL2 (aprotic [C 4 C 1 im][NTf 2 ]).

[0036] The oxygen reduction reaction catalyst contact angle test diagram of the target product obtained in Example 1 modified by ionic liquid is shown in figure 1 . Fouri...

Embodiment 2

[0042] The difference between Example 2 and Example 1 is that in step 2), the mass of ionic liquid added is 10 mg.

Embodiment 3

[0044] The difference between Example 3 and Example 1 is that in step 2), the mass of ionic liquid added is 20 mg.

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Abstract

The invention provides an ionic liquid modified oxygen reduction reaction catalyst and a preparation method thereof. The preparation method comprises the following steps: 1) mixing 60% commercial Pt / Cwith deionized water, and carrying out uniform ultrasonic treatment to obtain a mixture A; 2) mixing isopropanol with the hydrophobic ionic liquid, and carrying out uniform ultrasonic treatment to obtain a mixture B; and 3) uniformly mixing the mixture A and the mixture B under the assistance of ultrasonic waves, and carrying out rotary evaporation and drying on the obtained uniform mixture to obtain the ionic liquid modified oxygen reduction reaction catalyst. The ionic liquid is used for modifying the 60% commercial Pt / C catalyst, the method is simple, the surface of the 60% commercial Pt / Ccatalyst is effectively coated with the ionic liquid, and the oxygen reduction reaction performance of the catalyst under the acidic condition is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to an ionic liquid-modified oxygen reduction reaction catalyst and a preparation method. Background technique [0002] Proton exchange membrane fuel cells (PEMFCs) have the advantages of high power density, high specific energy, environmental friendliness, no emissions, and long battery life, making them ideal power sources for electric vehicles, stationary and portable devices. The cathodic oxygen reduction reaction of proton exchange membrane fuel cells is the rate-determining step of the electrode reaction. Currently, the electrode catalysts of proton exchange membrane fuel cells are highly dependent on the catalytic effect of platinum (Pt)-based materials. Although Pt-based catalysts have the best overall catalytic performance, the high cost, scarcity, and low durability of Pt limit their large-scale applications. Ionic liquids (ILs) have attracted much attention as a ...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J35/00H01M4/92
CPCB01J31/0284B01J31/0292H01M4/921H01M4/926B01J35/33Y02E60/50
Inventor 张锁江陈庆军乔越洋薛晓艺刘艳侠
Owner 郑州中科新兴产业技术研究院