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Ordered membrane electrode based on metal oxide nanoribbon as well as preparation and application thereof

A technology of oxides and membrane electrodes, applied in nanotechnology for materials and surface science, battery electrodes, nanotechnology, etc., can solve the problems of low catalyst utilization, large thickness of catalytic layer, high catalyst dosage, etc., and achieve the goal of catalyst group Adjustable temperature, mild preparation conditions, and thin catalytic layer

Active Publication Date: 2018-05-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional CCM electrode and GDE electrode have mature preparation technology, but the thickness of the catalytic layer of the electrode is large, and the catalyst is piled up disorderly, which makes the amount of catalyst used high and the utilization rate of catalyst low
In order to solve the problems of high consumption of precious metals and low catalyst utilization in fuel cells, the NSTF electrode developed by 3M has the characteristics of microscopic order and low catalyst loading, which can effectively reduce mass transfer resistance and improve catalyst utilization.

Method used

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  • Ordered membrane electrode based on metal oxide nanoribbon as well as preparation and application thereof
  • Ordered membrane electrode based on metal oxide nanoribbon as well as preparation and application thereof
  • Ordered membrane electrode based on metal oxide nanoribbon as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Preparation of Co-OH-CO by hydrothermal method using stainless steel as substrate 3 array. The reaction solution was 10 mM ammonium fluoride, 25 mM urea, and 5 mM cobalt nitrate. React in a high-pressure reactor at 120°C for 5 hours to prepare Co-OH-CO on the substrate 3 array. figure 2 a) shows the prepared Co-OH-CO 3 SEM image of the array. It can be seen from the figure that Co-OH-CO 3 The nanorod array grows uniformly on the substrate, and the growth direction is substantially perpendicular to the substrate. Co-OH-CO 3 The length of the nanorod is about 3μm, the diameter is about 100nm, Co-OH-CO 3 The areal density of nanorods is 3-4e 9 / cm 2 .

[0067] Co-OH-CO was deposited by magnetron sputtering 3 Nb loaded on the array 2 o 5 . The magnetron sputtering power is 100W, the sputtering time is 20min, and the operating pressure is 1.0Pa. Then magnetron sputtering method was used on Nb 2 o 5 The surface of the nanorod array was loaded with Pt, the ma...

Embodiment 2

[0074] Co-OH-CO 3 See Example 1 for the preparation of nanorod arrays.

[0075] Co-OH-CO was deposited by magnetron sputtering 3 Ta 2 o 5 . The magnetron sputtering power is 100W, the sputtering time is 20min, and the operating pressure is 1.0Pa. Then using magnetron sputtering method on Ta 2 o 5 The surface of the nanorod array was loaded with Pt, the magnetron sputtering power was 100W, the sputtering time was 10min, and the operating pressure was 1.0Pa. Figure 5 Shown is the prepared platinum-loaded Ta 2 o 5 SEM image of the nanorod array. It can be seen from the figure that Ta loaded with platinum 2 o 5 The nanorod array is perpendicular to the substrate, the length of the array is 2-5 μm, and the diameter of the nanorod is 100nm-200nm.

[0076] Will be loaded with platinum Ta 2 o 5 The nanorod array was transferred on one side of the ion exchange membrane, the transfer pressure was 10 MPa, the transfer temperature was 140° C., and the transfer time was 2 mi...

Embodiment 3

[0080] Co-OH-CO 3 See Example 1 for the preparation of nanorod arrays.

[0081] Co-OH-CO was deposited by magnetron sputtering 3 Nb loaded on the array 2 o 5 . The magnetron sputtering power is 100W, the sputtering time is 20min, and the operating pressure is 1.0Pa.

[0082] Prepare H at a concentration of 0.05M 2 IrCl 6 isopropanol solution, the Nb 2 o 5 Nanorod arrays were impregnated in the configured H 2 IrCl 6 In the isopropanol solution, control the immersion time to 3.0min and the immersion temperature to 25°C. After the impregnation is finished, take out the Nb 2 o 5 For nanorod arrays, absorb the remaining precursor solution on the surface and dry at room temperature. Nb impregnated with catalyst precursor 2 o 5 The nanorod array was placed in a tube furnace and calcined at 450°C for 1 hour to prepare the catalytic layer, and the calcining atmosphere was air.

[0083] Hot press the catalytic layer on 212 (DuPont) membrane, the transfer pressure was 3...

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Abstract

The invention provides an ordered membrane electrode based on metal oxide nanoribbon as well as a preparation method and application thereof. The ordered membrane electrode based on the metal oxide nanoribbon as well as the preparation method and application thereof comprise preparation of metal oxide nanoribbon, modification of surface of metal oxide nanoribbon and assembly of ordered membrane electrode. First, a regularly oriented Co-OH-CO3 array is grown on a substrate, then a metal oxide nanoribbon array is prepared by using a Co-OH-CO3 nanorod array as a template, and then a catalyst is supported on the surface of the metal oxide nanorod array, finally, the array is heated and pressed on an ion exchange membrane to obtain the membrane electrode, and the membrane electrode is subjectedto purification treatment. The ordered membrane electrode can be applied to a fuel cell, a solid polymer water electrolysis cell, and an integrated renewable fuel cell. The membrane electrode constructed by the invention has the advantages of low catalyst loading, high catalyst utilization, easy amplification and the like.

Description

technical field [0001] The invention relates to a method for preparing an ordered membrane electrode, which belongs to the fields of fuel cells and solid polymer water electrolysis cells. Background technique [0002] With the continuous development of technology and economy, the demand for energy in human society continues to increase. A clean and efficient energy storage technology has become the appeal of all mankind. The deteriorating ecological environment forces people to increase research and development efforts. [0003] As a clean and efficient energy carrier, hydrogen has become the research focus of governments and research institutions around the world. Electrolytic lye hydrogen production technology was once the mainstream technology for large-scale hydrogen production. However, the electrolyte is prone to loss, and the asbestos diaphragm used is harmful to the environment, which led to the elimination of this technology. The solid polymer electrolysis techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M8/1004B82Y30/00
CPCB82Y30/00H01M4/8842H01M4/8867H01M4/9075H01M8/1004Y02E60/50
Inventor 邵志刚曾亚超俞红梅张洪杰秦晓平宋微衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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