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Preparation method of core-shell structured catalyst for direct hydroboron fuel cell anode

A borohydride, fuel cell technology, used in fuel cells, battery electrodes, nanotechnology for materials and surface science, etc. Catalytic oxidation activity, low cost effect

Active Publication Date: 2014-12-17
清创人和生态工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN102380400 B discloses a kind of M core -Au shell A direct borohydride fuel cell with a core-shell structure as an anode catalyst and a preparation method thereof. This method can produce core-shell particles with a particle size of 10-50 nm, but the particle size distribution range is not related to the reaction temperature, the concentration of the reducing agent, and the reduction It is related to factors such as the drip rate of the agent, and cannot be adjusted and controlled artificially.

Method used

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Examples

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Effect test

Embodiment 1

[0041] Preparation of Cu-Ni alloy nanoparticles: the preparation concentration is 0.5 mol L -1 NiCl 2 and CuCl 2 Aqueous solution, respectively take 0.5mL and successively add 30 drops·min -1 The dropping speed was added to the mixed solution containing 4mL polyoxyethylene lauryl ether and 32 mL n-octane, at this time, ω=9, x=8, argon gas was always passed through during the dropping process and mechanical stirring and ultrasonic dispersion were maintained. Formulated as an inverse microemulsion containing two metal precursors. In the same way as above, 1ml of 2.0 mol L ?1 NaBH 4 In the mixed solution of aqueous solution, 4ml polyoxyethylene lauryl ether and 32ml n-octane, configure the reducing agent inverse microemulsion, and then reduce the reducing agent inverse microemulsion with 30 drops min -1 Add the reactant microemulsion at a dropping speed of 100%. During the dropping process, argon gas is always passed through and mechanical stirring and ultrasonic dispersion ...

Embodiment 2

[0046] Preparation of Cu-Fe alloy nanoparticles: the preparation concentration is 0.5 mol L -1 CuCl 2 and FeCl 2 Aqueous solution, respectively take 0.5mL and successively add 30 drops·min -1 The dropping speed was added to the mixed solution containing 3 mL polyoxyethylene stearyl ether and 18 mL n-heptane, at this time ω=7, x=6, argon gas was always passed through during the dropping process and mechanical stirring was maintained. Ultrasonic dispersion, formulated as an inverse microemulsion containing two metal precursors. In the same way as above, 1ml of 2.0 mol L ?1 hydrazine aqueous solution, 3 ml of polyoxyethylene stearyl ether and 18 ml of n-heptane mixed solution, configured as a reducing agent inverse microemulsion, and then the reducing agent inverse microemulsion was mixed with 30 drops·min -1 Add the reactant microemulsion at a dropping speed of 100%. During the dropping process, argon gas is always passed through and mechanical stirring and ultrasonic disper...

Embodiment 3

[0051] Preparation of Cu-Zn alloy nanoparticles: the preparation concentration is 0.5 mol L -1 CuCl 2 and ZnCl 2 Aqueous solution, respectively take 0.5mL and successively add 30 drops·min -1 The dropping speed is added to the mixed solution containing 6 mL sodium sulfosuccinate and 30 mL isooctane, at this time, ω=4, x=5, and argon gas is always passed through during the dropping process, and mechanical stirring and ultrasonic dispersion are maintained. , formulated as an inverse microemulsion containing two metal precursors. In the same way as above, 1ml of 2.0 mol L ?1 NaBH 4 Aqueous solution mixed with 6 ml sodium sulfosuccinate and 30 ml isooctane to form a reducing agent inverse microemulsion, and then reduce the reducing agent inverse microemulsion with 30 drops min -1 Add the reactant microemulsion at a dropping speed of 100%. During the dropping process, argon gas is always passed through and mechanical stirring and ultrasonic dispersion are maintained for 30 min...

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Abstract

A preparation method of a core-shell structured catalyst for a direct hydroboron fuel cell anode comprises the following steps: 1, preparing alloy nanoparticles of a core: preparing a core reactant micro-emulsion, preparing a reducing agent inverse micro-emulsion, and preparing alloy nanoparticles; and 2, preparing the core-shell structured catalyst: preparing a shell reactant micro-emulsion, and preparing a shell structured catalyst. The core-shell structured catalyst prepared through the method adopts a micro-emulsion method to effectively control the size of the particles in order to obtain particles with uniform dimensions, and a non-noble metal is used as a core element, so the noble metal is substantially reduced, the catalytic oxidation activity is improved, the surface morphology controllability of the metal nanoparticles is realized, and the preparation method has the advantages of simple operation, repeatability, low cost and easy realization of large scale production.

Description

technical field [0001] The invention relates to a method for preparing a direct borohydride fuel cell anode core-shell structure catalyst, in particular to a method for using a core-shell structure nanocomposite particle as the direct borohydride fuel cell anode. Background technique [0002] Direct liquid feed fuel cells use hydrogen-rich liquid fuels, such as methanol, ethanol, borohydride, dimethyl ether, etc., to solve the technical problems of on-load preparation, storage and transportation of hydrogen fuel cells. Most are direct methanol fuel cells. Compared with other liquid fuels, the alkali metal borohydride solution is a kind of hydrogen-containing and cheap hydrogen storage substance. For example, the gravimetric energy density of sodium borohydride is 5.67Ah / g, and the hydrogen content is 10.6% (weight percentage), compared with methanol, borohydride is chemically stable, easy to store and supply, safe to use and non-flammable, so the direct borohydride fuel cel...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86B82Y30/00
CPCB82Y30/00B82Y40/00H01M4/8828H01M4/9083H01M8/1009Y02E60/50
Inventor 段东红刘慧红卫国强卫慧凯梁建伟尤秀刘世斌
Owner 清创人和生态工程技术有限公司
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