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Pt-IrO2 double-effect oxygen electrocatalyst, preparation thereof and application of Pt-IrO2 double-effect oxygen electrocatalyst in integrated regenerated proton exchange membrane fuel cell

An electrocatalyst, pt-iro2 technology, applied in the field of electrocatalysis, can solve the problems of large diameter and low efficiency of nanowires, and achieve the effects of simple preparation method, environmental friendliness, and improved oxygen evolution performance.

Pending Publication Date: 2021-11-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent application (application number: CN201910559444.1) discloses a method for preparing Pt-IrO by electrospinning 2 Nanowire electrocatalysts, but due to the low efficiency of electrospinning and the large diameter of nanowires, it is not conducive to the cost reduction of electrocatalysts

Method used

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  • Pt-IrO2 double-effect oxygen electrocatalyst, preparation thereof and application of Pt-IrO2 double-effect oxygen electrocatalyst in integrated regenerated proton exchange membrane fuel cell
  • Pt-IrO2 double-effect oxygen electrocatalyst, preparation thereof and application of Pt-IrO2 double-effect oxygen electrocatalyst in integrated regenerated proton exchange membrane fuel cell
  • Pt-IrO2 double-effect oxygen electrocatalyst, preparation thereof and application of Pt-IrO2 double-effect oxygen electrocatalyst in integrated regenerated proton exchange membrane fuel cell

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Preparation of Pt nanowire mesh: Potassium chloroplatinite (20mM, 10mL) aqueous solution was added to 10mL chloroform containing hexadecyltrimethylammonium bromide (145.8mg), and heated at 25°C at 150rpm Stir for 1 h to completely transfer the compound containing Pt ions into chloroform, then take the chloroform phase and dilute with water to keep the Pt concentration in the system at 2 mM, adjust the rotation speed to 1600 rpm, and quickly add NaBH 4 (10mL, 300mM) solution, react for 10min, the reaction system gradually turns into a black suspension, keep it for later use;

[0033] (2) Take 5 mL of the above suspension, add sodium chloroiridate (62.6 μL, 20 mM) aqueous solution, react at 100 ° C for 12 h, then centrifuge and dry to obtain Pt-IrO 2 Nanowire mesh (electrocatalyst).

[0034] figure 1For Pt-IrO in Example 1 2 TEM image of the electrocatalyst, Pt-IrO 2 It is a nanowire network structure.

[0035] figure 2 For Pt-IrO in Example 1 2 Electrocatalys...

Embodiment 2

[0038] (1) Preparation of Pt nanowire mesh: Potassium chloroplatinite (20mM, 10mL) aqueous solution was added to 10mL chloroform containing hexadecyltrimethylammonium bromide (145.8mg), and heated at 25°C at 150rpm Stir for 1 h to completely transfer the compound containing Pt ions into chloroform, then take the chloroform phase and dilute with water to keep the Pt concentration in the system at 2 mM, adjust the rotation speed to 1600 rpm, and quickly add NaBH 4 (10mL, 300mM) solution, react for 10min, the reaction system gradually turns into a black suspension, keep it for later use;

[0039] (2) Take 5 mL of the above suspension, add sodium chloroiridate (141 μL, 20 mM) aqueous solution, react at 100 ° C for 12 h, then centrifuge and dry to obtain Pt-IrO 2 Nanowire mesh (electrocatalyst).

[0040] Figure 4 (a-b)Pt-IrO in Example 2 2 TEM image of the electrocatalyst, (c) Pt-IrO 2 The HAADF-STEM photo of , (d) is the Ir element distribution photo in Figure c, (e) is the P...

Embodiment 3

[0044] (1) Preparation of Pt nanowire mesh: Add chloroplatinic acid (20mM, 10mL) aqueous solution to 10mL chloroform containing hexadecyltrimethylammonium bromide (145.8mg), and stir at 150rpm at 25°C for 1h , so that the compound containing Pt ions is completely transferred to chloroform, then take the chloroform phase, add water to dilute, keep the concentration of Pt in the system at 2mM, adjust the rotation speed to 1600rpm, quickly add oxalic acid (10mL, 300mM) solution, and react for 30min , the reaction system gradually turned into a black suspension, which was kept for later use;

[0045] (2) Take 5 mL of the above suspension, add iridium chloride (62.6 μL, 20 mM) aqueous solution, react at 100 ° C for 12 h, then centrifuge and dry to obtain Pt-IrO 2 Nanowire mesh (electrocatalyst).

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Abstract

The invention belongs to the field of electrocatalysis, and particularly relates to a Pt-IrO2 double-effect oxygen electrocatalyst, a preparation method thereof and application of the Pt-IrO2 double-effect oxygen electrocatalyst in an integrated regenerated proton exchange membrane fuel cell. By controlling the components, size, morphology and the like of the electrocatalyst, the good oxygen reduction / oxygen evolution double-effect oxygen electrocatalyst is obtained, and the Pt-IrO2 electrocatalyst is simple in preparation method, environmentally friendly, short in preparation period, easy to amplify and synthesize and capable of being applied to the field of electrocatalysis.

Description

technical field [0001] The present invention relates to a kind of Pt-IrO 2 A double-effect oxygen electrocatalyst and its preparation and application in an integrated regenerative proton exchange membrane fuel cell belong to the field of electrocatalysis. Background technique [0002] The growing energy demand has prompted intensive research on electrochemical technologies for energy storage and energy conversion, such as integrated regenerative proton exchange membrane fuel cells (UR-PEMFC). UR-PEMFC combines a proton exchange membrane fuel cell (PEMFC) and a proton exchange membrane water electrolysis cell (PEMEC), has a high specific energy (0.4-1.0kWh / kg), has long-term storage capacity due to the elimination of self-discharge, and at the same time It has the advantages of power output capacity and energy storage capacity, and has been widely concerned. Nevertheless, UR-PEMFC still needs to be further improved and optimized to reach the level of fuel cells and electrol...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/9041H01M4/9016H01M4/9058H01M4/8825Y02E60/50
Inventor 宋玉江吕洋
Owner DALIAN UNIV OF TECH
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