Alloy nano-catalyst, preparation method thereof and fuel cell

A nano-alloy, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor catalytic activity and weak stability

Inactive Publication Date: 2020-10-23
SHENZHEN ACAD OF AEROSPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide an alloy nanocatalyst and its preparation method, as well as a fuel cell, aiming to solve the problem of poor catalytic activity and weak stability of the alloy nanocatalyst in the prior art

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  • Alloy nano-catalyst, preparation method thereof and fuel cell
  • Alloy nano-catalyst, preparation method thereof and fuel cell
  • Alloy nano-catalyst, preparation method thereof and fuel cell

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preparation example Construction

[0037] In a second aspect, the application provides a method for preparing an alloy nanocatalyst, comprising the steps of:

[0038] S01. In the protective gas, provide a reductive shape-oriented organic solvent, mix the metal precursor and the organic solvent to obtain a first mixed solution, and heat-treat the first mixed solution to obtain a metal colloid;

[0039] S02. mixing metal colloid and carbon-based carrier dispersion to obtain alloy nanocatalyst;

[0040] Wherein, the alloy nanocatalyst includes a carbon-based support and worm-like alloy nanoparticles adsorbed on the surface of the carbon-based support.

[0041] The preparation method is simple and easy to operate, and the alloy nanocatalyst of the worm-like alloy nanoparticles adsorbed on the surface of the carbon-based support can be prepared by only two steps. In the preparation process, no other polymers need to be added, and the reaction process is simple. The reaction conditions are mild, suitable for large-s...

Embodiment 1

[0065] A PtNi / C alloy nano-catalyst, the alloy nano-catalyst includes a carbon-based carrier, and alloy nanoparticles adsorbed on the surface of the carbon-based carrier, the alloy nano-particles are worm-like.

[0066] The preparation method of PtNi / C alloy nano catalyst comprises the steps:

[0067] in N 2 In the protective gas, mix the metal precursor and the organic solvent to obtain the first mixed liquid, wherein the metal precursor is 50 mL of H with a concentration of 1.4 mg / mL 2 PtCl 6 ·6H 2 O and Ni(NO) 3 The mixed solution of organic solvent is the oleylamine solution of 150mL;

[0068] Heat the first mixed solution in an oil bath to 100-110°C, heat up to 200-230°C and reflux for 2-5 hours, the color of the solution gradually changes from light yellow to dark brown, and a stable metal Pt colloidal solution is obtained;

[0069] Provide carbon black powder with a mass of 280 mg and an average particle size of 50 nm, mix it with 100 mL of n-hexane solution, and p...

Embodiment 2

[0074] A PtNi / C alloy nano-catalyst, the alloy nano-catalyst includes a carbon-based carrier, and alloy nanoparticles adsorbed on the surface of the carbon-based carrier, the alloy nano-particles are worm-like.

[0075] The preparation method of PtNi / C alloy nano catalyst comprises the steps:

[0076] in N 2 In the protective gas, mix the metal precursor and the organic solvent to obtain the first mixed liquid, wherein the metal precursor is 50 mL of Pt(acac) with a concentration of 1.4 mg / mL 2 and Ni(acac) 2 The mixed solution of organic solvent is the oleylamine solution of 150mL;

[0077] Heat the first mixed solution in an oil bath to 100-110°C, heat up to 200-230°C and reflux for 2-5 hours, the color of the solution gradually changes from light yellow to dark brown, and a stable metal Pt colloidal solution is obtained;

[0078] Provide carbon black powder with a mass of 280 mg and an average particle size of 50 nm, mix it with 100 mL of n-hexane solution, and perform u...

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Abstract

The invention relates to the technical field of catalysts, and provides an alloy nano-catalyst which comprises a carbon-based supporter and alloy nano-particles adsorbed on the surface of the carbon-based supporter, and the alloy nano-particles are wormlike. According to the alloy nano-catalyst provided by the invention, the alloy nano-catalyst takes a carbon base as a supporter, and the carbon base supporter is smooth in surface, few in gaps and relatively high in chemical stability; wormlike alloy nanoparticles are adsorbed on the surface of the carbon base supporter, the wormlike alloy nanoparticles have higher specific activity, and the structure exposes more alloy nanoparticle sites, so that the alloy nano-catalyst has good conductivity, higher chemical stability and high electrochemical stability; wormlike alloy nano-particles can be anchored on the surface of the carbon base supporter more stably, the stability is higher, and the alloy nano-catalyst can be applied more widely.

Description

technical field [0001] The application belongs to the technical field of catalysts, and in particular relates to an alloy nanocatalyst, a preparation method thereof, and a fuel cell. Background technique [0002] A fuel cell is an energy conversion device, which isothermally converts the chemical energy stored in the fuel and oxidant directly into electrical energy according to the electrochemical principle, that is, the working principle of the primary battery, so the actual process is an oxidation-reduction reaction. Fuel cells are mainly composed of four parts, namely anode, cathode, electrolyte and external circuit. Fuel gas and oxidant gas are passed through the anode and cathode of the fuel cell respectively. The fuel gas emits electrons on the anode, and the electrons are conducted to the cathode through an external circuit and combine with the oxidizing gas to form ions. Under the action of an electric field, the ions migrate to the anode through the electrolyte, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/8825H01M4/9041H01M4/9083Y02E60/50
Inventor 范洪东瞿威张胜刚涂婷
Owner SHENZHEN ACAD OF AEROSPACE TECH
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