A kind of fuel cell catalyst with nano cable as carrier and preparation method thereof

A nano-cable and fuel cell technology, which is applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of reduced catalyst utilization, difficulty in noble metal particles, lack of active sites, etc., and achieves improved stability, Prevents oxidation and corrosion, improves activity

Active Publication Date: 2017-09-19
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Commonly used supports include carbon black (XC-72), carbon nanotubes (MWCNTs) and mesoporous carbon. Carbon black is one of the widely used catalyst supports at present, but its corrosion resistance is weak and its stability is poor; the surface of carbon nanotubes It is inert and lacks active sites, and it is difficult for noble metal particles to deposit uniformly on its surface; the porous nature of mesoporous carbon makes it possible for some catalyst metal nanoparticles to be coated in the pores, resulting in a decrease in the utilization rate of the catalyst

Method used

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  • A kind of fuel cell catalyst with nano cable as carrier and preparation method thereof
  • A kind of fuel cell catalyst with nano cable as carrier and preparation method thereof
  • A kind of fuel cell catalyst with nano cable as carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Taking Ag@C nanocables loaded with noble metal Pt as a catalyst as an example, the noble metal loading is 5% for illustration.

[0031] Take 0.25g silver nitrate and 1.1mL glycerin (molar ratio is 1:13, silver nitrate 0.0012mol, glycerin 0.015mol) and add 35mL sulfuric acid solution with a molar concentration of 1mol / L, stir well and transfer to 50mL In a polytetrafluoroethylene reactor, react at 170°C for 10h, cool to room temperature, wash with deionized water and ethanol several times, and dry in vacuum;

[0032] Put the product into a tubular atmosphere furnace and calcined under the protection of nitrogen at a temperature of 600°C. Add the calcined product to 150 mL of potassium hydroxide solution with a molar concentration of 2 mol / L, and heat to reflux in a boiling water bath for 2 hours. , after cooling down to room temperature, wash with deionized water to neutrality, collect after drying to obtain Ag@C nanocable carrier, figure 1 It is the XRD pattern of the ...

Embodiment 2

[0036] Taking Cu@C nanocables loaded with noble metal Pt as a catalyst as an example, the noble metal loading is 20% for illustration.

[0037] Take 0.51g copper chloride and 13g glucose (the molar ratio is 1:20, including 0.0037mol copper chloride and 0.074mol glucose), add 35mL deionized water, stir evenly, transfer to a 50mL polytetrafluoroethylene reactor, and React at 160°C for 36 hours, wash with deionized water several times after cooling to room temperature, and dry in vacuum;

[0038] Put the product into a tubular atmosphere furnace and calcined under the protection of nitrogen at a temperature of 700°C. Add the calcined product to 100 mL of sodium hydroxide solution with a molar concentration of 2 mol / L, and heat to reflux in a boiling water bath for 3 hours. , after cooling down to room temperature, washed with deionized water until neutral, dried and collected to obtain Cu@C nanocable carrier.

[0039]Take 40mg of Cu@C nanocable carrier and 100mg of sodium oxalat...

Embodiment 3

[0042] Taking Zn@C nanocables loaded with noble metal Pt as a catalyst as an example, the noble metal loading is 5% for illustration.

[0043] Take 1g of zinc sulfate and 1.7mL of ethylene glycol (the molar ratio is 1:5, of which zinc sulfate is 0.0062mol and ethylene glycol is 0.031mol), add it to 35mL of ethylene glycol, stir well and transfer to 50mL polytetrafluoroethylene for reaction In the kettle, react at 100°C for 48h, cool to room temperature, wash with deionized water and ethanol several times, and dry in vacuum;

[0044] Put the product into a tubular atmosphere furnace and calcinate under the protection of nitrogen. The calcining temperature is 500 ° C. Add the calcined product to 200 mL of ammonia solution with a molar concentration of 1 mol / L, heat and reflux in a boiling water bath for 1 hour, and drop to After reaching room temperature, it was washed with deionized water to neutrality, and collected after drying to obtain Zn@C nano-cable carrier.

[0045] Tak...

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Abstract

The invention discloses a fuel cell catalyst taking a nanocable as a carrier and a preparation method thereof, and belongs to the technical field of fuel cell catalysts. According to the technical scheme provided by the invention, the fuel cell catalyst taking the nanocable as the carrier is characterized in that the fuel cell catalyst is formed by loading unitary, binary or multiple precious metal active components on the nanocable carrier, wherein the nanocable carrier is of a one-dimensional nanocable structure taking a metal nanofiber as a core and graphite carbon as a shell. The invention also discloses a preparation method of the fuel cell catalyst taking the nanocable as the carrier. The catalyst disclosed by the invention is relatively wide in application range, can be used for catalytic oxidation of small molecular acid and alcohol substances including formic acid, methanol, ethanol, ethylene glycol, glycerin and isopropyl alcohol, and has excellent electrochemical performance, so that the fuel cell catalyst has a broad application prospect on proton exchange membrane fuel cells.

Description

technical field [0001] The invention belongs to the technical field of fuel cell catalysts, and in particular relates to a fuel cell catalyst with a nano cable as a carrier and a preparation method thereof. Background technique [0002] As a clean energy source, the proton exchange membrane fuel cell (PEMFC) has renewable fuel, wide sources, safe storage, and environmental friendliness. Its power generation process does not involve hydrogen and oxygen combustion, so it is not limited by the Carnot cycle, and the energy conversion rate is high. , No pollution during power generation, modular power generation unit, high reliability, convenient assembly and maintenance, low noise during operation, especially suitable for portable power sources and electric vehicles. In addition, the use of proton exchange membrane fuel cell hydrogen power generation can greatly improve the reliability of power supply for important equipment and building electrical systems, and greatly improve t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J23/52B01J32/00H01M4/92H01M4/88
CPCY02E60/50
Inventor 白正宇石敏张庆房立黄茹梦杨林
Owner HENAN NORMAL UNIV
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