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Hollow nano carbon sphere loaded nano Ag particle fuel battery oxygen reducing catalyst as well as preparation method and application thereof

A nano-carbon sphere, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems that restrict the large-scale application and commercial development of fuel cells, the high cost of Pt electrodes, and the lack of resources, and achieve good application prospects. , easy operation, high electrocatalytic efficiency

Active Publication Date: 2018-06-29
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Nowadays, the widely used fuel cell cathode catalyst is Pt / C catalyst, but due to the high cost of Pt electrode, low durability, lack of resources, and serious poisoning [Zhang, L.; Zhang, J.; Wilkinson, D.P.; Wang ,H.J.PowerSources 2006,156,171.] Restricted the large-scale application and commercialization of fuel cells

Method used

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  • Hollow nano carbon sphere loaded nano Ag particle fuel battery oxygen reducing catalyst as well as preparation method and application thereof
  • Hollow nano carbon sphere loaded nano Ag particle fuel battery oxygen reducing catalyst as well as preparation method and application thereof
  • Hollow nano carbon sphere loaded nano Ag particle fuel battery oxygen reducing catalyst as well as preparation method and application thereof

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preparation example Construction

[0043] In one embodiment of the present invention, the preparation method of hollow nano-carbon spheres supported nano-Ag particle fuel cell oxygen reduction catalyst of the present invention comprises the following steps:

[0044] S101: Preparation of hollow carbon nanospheres;

[0045] Hollow micron-scale carbon spheres have the advantages of strong chemical and thermal stability, low density, controllable specific surface area, high compressive strength, and high chemical inertness. Therefore, the oxygen reduction catalyst prepared with hollow nano-carbon spheres as a carrier can be applied to Fuel cells, catalyst supports, lithium-ion battery anode materials, supercapacitor electrode materials, etc.

[0046] In S101, the preparation of hollow nano-carbon spheres is as follows: prepare glucose solution, pour the glucose solution into the reaction kettle, put it into an oven for hydrothermal reaction, the concentration of the glucose solution is 50-60g / L; The reaction condi...

Embodiment 1

[0060] Silver ions are reduced on carbon spheres by a citric acid reduction method to obtain a fuel cell oxygen reduction catalyst with silver particles as active sites and hollow nanometer carbon spheres as a carrier.

[0061] Take 4.5g of glucose, dissolve it in 75mL of deionized water and stir evenly, put the solution in a 100mL reaction kettle, put it in an oven, and keep the water heating at 160-180°C for 10-12 hours. Then, wash with deionized water and absolute ethanol, centrifuge and wash 6 times at 8000r / min, each time for 5-10min, and dry in an oven at 60-80°C for 12h to obtain hollow nano-carbon spheres; weigh the obtained nano-carbon spheres Take 0.25g, disperse it into 30mL of absolute ethanol, sonicate for 1h and add 1-3 drops of oleic acid dropwise, continue to sonicate for 30min; obtain functionalized hollow nano-carbon spheres; weigh silver nitrate with a molar ratio of 1:1 ( 0.5g) and citric acid (0.6g in excess) to configure the solution, first add the silver...

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Abstract

The invention discloses a preparation method of a hollow nano carbon sphere loaded nano Ag particle fuel battery oxygen reducing catalyst. The method comprises the following steps: 1) preparing hollownano carbon spheres; 2) dispersing the hollow nano carbon spheres into a dispersing agent, and dropwise adding oil acid to ensure that the surfaces of the hollow nano carbon spheres are bonded with carboxyl active groups; 3) using the hollow nano carbon spheres as a carrier and using added silver nitrate as a silver source, dropwise adding ethylene glycol, and performing reduction by utilizing citric acid to obtain the hollow nano carbon sphere loaded nano Ag particle fuel battery oxygen reducing catalyst. According to the preparation method of the hollow nano carbon sphere loaded nano Ag particle fuel battery oxygen reducing catalyst disclosed by the invention, by using the silver nitrate as the silver source and using the hollow nano carbon spheres as the carrier, the surfaces of the carbon spheres are activated by dropwise adding the oil acid; the silver nitrate is reduced by utilizing the citric acid, and ethylene glycol is dropwise added, so that particles of the silver are morerefined; a preparation process is simple to operate; the prepared product has uniform particles and is high in load capacity.

Description

technical field [0001] The invention belongs to the technical field of fuel cell electrocatalysis, and in particular relates to a fuel cell oxygen reduction catalyst supported by hollow nanometer carbon spheres and nano Ag particles, as well as its preparation method and application. Background technique [0002] With the depletion of fossil energy and the pollution of the environment during use, we are required to develop clean and renewable energy as soon as possible. Fuel cell is a high-efficiency green and clean energy conversion system with great potential at present. It is the fourth type of power generation technology after thermal power, hydropower and nuclear power generation. The chemical energy of the oxygen) reaction is directly converted into electrical energy through an electrochemical reaction without combustion [Zhou Chonglin, Wei Xianquan, Jiang Ningning, et al. Application and Prospect of Fuel Cell, Lutianhua Technology, 2009,4: 409-412]. Huang Youju and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/9041H01M4/9058H01M4/9083Y02E60/50
Inventor 梁栋黄太仲
Owner UNIV OF JINAN
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