Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of magnetic nano porous Fe-Pt alloy with electro-oxidation catalytic performance

An electro-oxidation catalysis, magnetic nanotechnology, applied in nanotechnology and other directions, can solve the problems of cumbersome dealloying process, strict requirements for thin-film alloy preparation process, brittleness, etc., to improve the controllability of pore size and good resistance to CO. Poisoning ability, the effect of improving the uniformity of the structure

Inactive Publication Date: 2016-06-08
DALIAN UNIV OF TECH
View PDF4 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low diffusion rate of Pt atoms at the alloy / electrolyte interface during the dealloying process of Pt-Cu alloy, the pore size of the obtained nanoporous Pt alloy is small, and the pore size needs to be adjusted by subsequent annealing treatment; thin film The preparation process of the alloy is demanding and the production efficiency is low; the dealloying process of the Fe-Pt-Al alloy is cumbersome and the morphology of the dealloyed nanoporous metal material is not easy to control, and there are defects such as brittleness and cracking, which are serious impedes its practical application in the field of catalysis

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of magnetic nano porous Fe-Pt alloy with electro-oxidation catalytic performance
  • Preparation method of magnetic nano porous Fe-Pt alloy with electro-oxidation catalytic performance
  • Preparation method of magnetic nano porous Fe-Pt alloy with electro-oxidation catalytic performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: now with Fe 60 Pt 10 B 30 Taking the amorphous precursor alloy as an example, the implementation of the preparation and performance testing of the Fe-Pt nanoporous alloy will be described in detail in conjunction with the accompanying drawings.

[0021] Step 1: Preparation of Amorphous Precursor Alloy Strips

[0022] 1.1 Select high-purity Fe (99.9wt.%), Pt (99.95wt.%) and B (99.5wt.%) raw materials according to Fe 60 Pt 10 B 30 (atomic percent) ingredients are weighed for batching.

[0023] 1.2 Alloy ingot melting

[0024] Mix the weighed metal raw materials into the water-cooled copper crucible of the arc melting furnace, and evacuate to 6×10 -3 Pa, and then filled with an appropriate amount of argon to start melting the alloy. After melting, the alloy ingot was turned upside down and smelted repeatedly 4 times to obtain Fe with uniform composition. 60 Pt 10 B 30 alloy ingot.

[0025] 1.3 Preparation of amorphous strips

[0026] Put the alloy...

Embodiment 2

[0041] Example 2: Precursor alloy composition Fe 60 Pt 10 B 25 Si 5

[0042] The preparation of the precursor alloy and the nanoporous alloy, as well as the magnetic and catalytic performance tests are the same as in Example 1. In the first step, the width of the precursor alloy strip is about 1-2 mm, the thickness is about 20 μm, and it is a completely amorphous structure. The dealloying voltage involved in the second step 2.2 is -190 mV, and the obtained nanometer The porous Fe-Pt alloy is mainly composed of fcc-FePt phase, and the pore size and pore wall thickness are about 6nm and 10nm, respectively. The data obtained in the magnetic and catalytic performance test of the third step are: M s 23.5emu / g at 0.856V f 1.047A / cm 2 , J at 0.419V b 0.533A / cm 2 , J f / J b is 1.964. The specific data are listed in the attached table.

Embodiment 3

[0043] Embodiment 3: Precursor alloy composition Fe 60 Pt 5 PD 5 B 30

[0044] The preparation of the precursor alloy and the nanoporous alloy, as well as the magnetic and catalytic performance tests are the same as in Example 1. The precursor alloy strip obtained in the first step has a width of about 1-2 mm, a thickness of about 20 μm, and a completely amorphous structure. The dealloying voltage involved in the second step 2.2 is -190 mV, and the obtained The nanoporous Fe-Pt alloy is mainly composed of fcc-FePt phase, and the pore size and pore wall thickness are about 7nm and 10nm, respectively. The data obtained in the magnetic and catalytic performance test of the third step are: M s 21.4emu / g, J at 0.821V f 0.484A / cm 2 , J at 0.456V b 0.204A / cm 2 , J f / J b is 2.373. The specific data are listed in the attached table.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Saturation magnetizationaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of magnetic nano porous Fe-Pt alloy with electro-oxidation catalytic performance and belongs to the technical field of new materials. An electric arc furnace or induction melting furnace is used for preparing Fe-Pt-(B, Si) system alloy master alloy ingots, and a precursor alloy strip with an amorphous or amorphous / nanocrystalline structure is prepared through a single-roller melt-spinning method; and precursor alloy is used as a working electrode, elements such as Fe, B and / or Si in the alloy are selectively etched off through a dealloying process in a room-temperature and acid environment, and the nano porous Fe-Pt alloy with the pore size ranging from 3 nm to 18 nm and the pore wall thickness ranging from 5 nm to 22 nm is obtained. According to the preparation method, the process is simple, the procedure is short, and high efficiency and energy conservation are achieved. The obtained magnetic nano porous Fe-Pt alloy is uniform and controllable in pore size, has good catalytic activity and anti-CO-poisoning capacity for an electro-oxidation reaction in methyl alcohol and other substances in acid liquid, is easy to recycle and serves as a catalyst for an anodic reaction in fuel cells such as acidic methanol.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a preparation method of a magnetic nanoporous Fe-Pt alloy with electro-oxidation catalytic performance. Background technique [0002] Nanoporous metals refer to metal materials with pore sizes on the nanometer scale and three-dimensional bicontinuous porous structures. Nanoporous metals have the characteristics of porous materials, metal materials and nanomaterials, and have excellent physical and chemical properties such as low density, high specific surface area, good electrical conductivity, thermal conductivity, and strong nanoscale effect. They are used in catalysis, sensing, and biological It has great application potential in fields such as medical treatment and new energy. [0003] Dealloying, also known as dealloying, is one of the methods for efficiently preparing nanoporous metals. Specifically, it refers to the selective dissolution and removal of active componen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C25C5/02C25F3/14C22C3/00C22C1/08C22C5/04B82Y40/00
CPCC25C5/02B82Y40/00C22C1/08C22C3/00C22C5/04C25F3/14
Inventor 张伟欧淑丽马殿国李艳辉王英敏
Owner DALIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com