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Catalyst for loading cobalt phosphide on activated carbon as well as preparation and application of catalyst

A technology of activated carbon and cobalt phosphide, which is applied to a catalyst supporting cobalt phosphide on activated carbon and its preparation field, can solve problems such as being in the initial stage, and achieve the effects of simple operation, good catalytic performance, and excellent hydrogen evolution catalytic performance.

Active Publication Date: 2015-09-30
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, research on them is still in its infancy

Method used

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  • Catalyst for loading cobalt phosphide on activated carbon as well as preparation and application of catalyst
  • Catalyst for loading cobalt phosphide on activated carbon as well as preparation and application of catalyst
  • Catalyst for loading cobalt phosphide on activated carbon as well as preparation and application of catalyst

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preparation example Construction

[0031] The preparation method of activated carbon is as follows:

[0032] 1) Wash and cut the harvested camphor leaves with deionized water, mix the chopped camphor leaves with CaCO 3 Mix the nanoparticles, add an ethanol solution with a mass fraction of 50% to fully grind, and then microwave for 2 minutes at a power of 300W-500W;

[0033] 2) Filter with a filter membrane with a pore size of 0.2 μm, and the resulting filtrate is dried at 70°C to obtain a viscous product. 3g of the above product and 3g of CaCO3 nanoparticles are mixed with ethanol and fully ground evenly and placed in a blast drying oven at 60°C Bake for 2 hours, then anneal for 2 hours at 800°C under the protection of argon atmosphere;

[0034] 3) The product obtained above was washed successively with 1M HCl and deionized water, repeated three times, and dried at 60° C. to obtain activated carbon.

Embodiment 1

[0036] In this embodiment, the preparation method of a hydrogen evolution catalyst with activated carbon (HNC) as a carrier comprises the following steps:

[0037] 1) Weigh 1mol Co(NO 3 )2·6H 2 O, 2.5mol CO(NH 3 )2 and 5mol NH4F were dissolved in 40ml deionized water, stirred for 10min to form a mixed solution;

[0038] 2) Transfer 0.5ml of the mixed solution prepared in step 1) to a polytetrafluoroethylene-lined stainless steel reaction kettle with 29.5ml of deionized water, and weigh 10mg of HNC in the reaction kettle for 30min sonication;

[0039] 3) The mixed solution in step 2) was subjected to a hydrothermal reaction at 120° C. for 12 hours;

[0040] 4) Washing, suction filtering and drying the solution in step 3) to obtain the precursor;

[0041] 5) Rapidly raise the temperature of the precursor and sodium hypophosphite obtained in step 4) to 300°C at a rate of 2°C / s under the protection of argon and keep it for 2h, and the product obtained after cooling is the targ...

Embodiment 2

[0048] The preparation method of the hydrogen evolution catalyst with HNC as the carrier of the present embodiment comprises the following steps:

[0049] 1) Weigh 1mol Co(NO 3 )2·6H 2 O, 2.5mol CO(NH 3 )2 and 3mol NH4F were dissolved in 40ml deionized water, stirred for 10min to form a mixed solution;

[0050] 2) Take 0.25ml of the mixed solution prepared in step 1) and transfer it to a polytetrafluoroethylene-lined stainless steel reaction kettle with 29.75ml of deionized water, and weigh 10mg of HNC in the reaction kettle for 30min sonication;

[0051] 3) The mixed solution in step 2) was subjected to a hydrothermal reaction at 120° C. for 12 hours;

[0052] 4) Washing, suction filtering and drying the solution in step 3) to obtain the precursor;

[0053] 5) The precursor and sodium hypophosphite obtained in step 4) were rapidly heated to 300°C at a rate of 2°C / s under the protection of argon and kept for 2h, and the product obtained by cooling was the hydrogen evolution ...

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Abstract

The invention relates to a catalyst for loading cobalt phosphide on activated carbon as well as preparation and application of the catalyst. The catalyst is prepared by taking multilayer nanoporous activated carbon (HNC) as a carrier and loading cobalt phosphide (CoP) on the surface of the activated carbon. The preparation method comprises the following steps: mixing cobalt nitrate hexahydrate (Co(NO3)2.6H2O), urea (CO(NH3)2), ammonium fluoride (NH4F) and deionized water to obtain a reaction mixture raw material; mixing a certain quantity of HNC with the reaction mixture raw material under an ultrasonic condition for hydrothermal reaction; carrying out suction filtration drying to obtain a precursor; conducting annealing on the precursor and sodium hypophosphite under the protecting atmosphere of argon; carrying out cooling. The catalyst prepared according to the preparation method can be used for electrochemical hydrogen evolution, and is excellent in catalytic activity for hydrogen evolution.

Description

technical field [0001] The invention belongs to the field of hydrogen evolution reaction, and relates to a catalyst for supporting cobalt phosphide on activated carbon, a preparation method and application thereof. Background technique [0002] Due to its high energy density and non-environmental pollution during use, hydrogen is expected to be a promising energy source to replace fossil fuels. Electrochemical hydrogen evolution is one of the most promising hydrogen production methods due to its simplicity, cleanness, and the ability to obtain high-purity hydrogen without separation. However, the overpotential of the hydrogen evolution reaction increases energy consumption. To increase the reaction rate and reduce the overpotential, it is necessary to use highly efficient electrocatalysts for the hydrogen evolution reaction. Platinum group metals are recognized as the best hydrogen evolution catalysts, but they are expensive and scarce. Therefore, it is of great significan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J32/00B01J35/10C25B1/04
CPCY02E60/36
Inventor 袁伟永王晓艳李长明
Owner SOUTHWEST UNIV
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