Electrocatalyst for a fuel cell and the method of preparing thereof

A technology for electrode catalysts and fuel cells, applied in battery electrodes, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor durability, affecting performance, and affecting the efficiency of direct methanol fuel cells

Inactive Publication Date: 2013-12-18
NANO & ADVANCED MATERIALS INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other drawbacks are that conventional anode electrode catalysts are known to have very low electrode catalytic activity and poor durability
These defects have significantly affected the efficiency of direct methanol fuel cells (DMFCs) and therefore their performance

Method used

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  • Electrocatalyst for a fuel cell and the method of preparing thereof
  • Electrocatalyst for a fuel cell and the method of preparing thereof
  • Electrocatalyst for a fuel cell and the method of preparing thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Step 1: Carbon nanotubes (CNTs) were dispersed in ruthenium trichloride aqueous solution by sonication, wherein the mass ratio of CNTs to ruthenium was in the range of 1:0.02, and the sonication time was 0.5 hours. Hydrogen peroxide (30% (volume)) was added dropwise at a rate of 9 mL / h, and the ratio of the volume of hydrogen peroxide (30% (volume)) to the mass of ruthenium was 1 ml: 1 mg. The suspension was refluxed for 3 hours at a temperature of 60°C. After filtering, washing and drying at a temperature of 90 °C, carbon nanotubes loaded with ruthenium dioxide (RuO 2 / CNTs complex).

[0063] Step 2: Incorporate the RuO 2 / CNTs were dispersed into ethylene glycol added with chloroplatinic acid, in which the mass ratio of ruthenium to platinum to ethylene glycol was 1:0.5:200. The pH value of the suspension was adjusted to 6.5, and then the suspension was heated and refluxed at a temperature of 90° C. for 1.5 hours. After filtering, washing and drying at a temperatu...

Embodiment 2

[0066] Step 1: Carbon nanotubes (CNTs) were dispersed in ruthenium trichloride aqueous solution by sonication, wherein the mass ratio of CNTs to ruthenium was in the range of 1:0.04, and the sonication time was 1 hour. Hydrogen peroxide (30% (volume)) was added dropwise at a rate of 12 ml / h, and the ratio of the volume of hydrogen peroxide (30% (volume)) to the mass of ruthenium was 1.3 ml: 1 mg. The suspension was refluxed for 4 hours at a temperature of 80°C.

[0067] After filtering, washing and drying at a temperature of 100 °C, carbon nanotubes loaded with ruthenium dioxide (RuO 2 / CNTs complex).

[0068] Step 2: RuO 2 / CNTs were dispersed into ethylene glycol added with chloroplatinic acid, in which the mass ratio of ruthenium to platinum to ethylene glycol was 1:1:250. The pH value of the suspension was adjusted to 8, and then the suspension was heated and refluxed at a temperature of 130° C. for 2 hours. After filtering, washing and drying at a temperature of 70 °C...

Embodiment 3

[0072] Step 1: Carbon nanotubes (CNTs) were dispersed in ruthenium trichloride aqueous solution by sonication, wherein the mass ratio of CNTs to ruthenium was in the range of 1:0.08, and the sonication time was 2 hours. Add hydrogen peroxide (30% (volume)) dropwise at a rate of 15 mL / h, and the ratio of the volume of hydrogen peroxide (30% (volume)) to the mass of ruthenium is 1.5 mL: 1 mg. The suspension was refluxed for 4.5 hours at a temperature of 85°C. After filtering, washing and drying at a temperature of 110 °C, carbon nanotubes loaded with ruthenium dioxide (RuO 2 / CNTs complex).

[0073] Step 2: RuO 2 / CNTs were dispersed into ethylene glycol added with chloroplatinic acid, in which the mass ratio of ruthenium to platinum to ethylene glycol was 1:1.2:270. The pH value of the suspension was adjusted to 8.5, and then the suspension was heated and refluxed at a temperature of 135° C. for 2.5 hours. After filtering, washing and drying at a temperature of 75 °C, the R...

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Abstract

The invention relates to an electrocatalyst for a fuel cell comprising carbon nanotubes as substrate, ruthenium oxide deposited on the substrate, platinum particles supported on the ruthenium oxide, and manganese dioxide layer coated on the surface of the ruthenium oxide-platinum particles deposited carbon nanotubes. The invention also relates to the method of preparing the electrocatalyst for a fuel cell comprising the steps of depositing ruthenium oxide on the surface of carbon nanotubes, depositing platinum particles on the ruthenium oxide, and coating a manganese dioxide layer on the surface of the ruthenium oxide-platinum particles deposited carbon nanotubes.

Description

technical field [0001] The present invention relates to an electrode catalyst suitable for a fuel cell, and particularly but not exclusively relates to an anode electrode catalyst suitable for a fuel cell and a preparation method of the electrode catalyst. Background technique [0002] Fuel cells have been considered as an environmentally clean, economical, and efficient alternative energy source, which has attracted more and more attention from governments, industries, and academic institutions. A fuel cell is a device that generates electricity from the chemical reaction process of fuel and oxidant. Electrochemical fuel cells generally include an anode electrode and a cathode electrode separated by an electrolyte. The proton exchange membrane fuel cell (PEMFC) is the most widely studied type of fuel cell, in which hydrogen is used as fuel. However, in consideration of the in-situ production of hydrogen and the high purity and storage aspects of hydrogen required for prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92B01J23/42B01J23/46
CPCH01M4/926Y02E60/50H01M4/8657H01M4/8663H01M4/8825H01M4/8892
Inventor 王红娟彭峰余皓郑家道
Owner NANO & ADVANCED MATERIALS INST
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