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n-doped porous carbon-coated mop nanorod material and its preparation method and application

A technology of nanorods and porous carbon, which is applied in carbon preparation/purification, chemical instruments and methods, catalyst activation/preparation, etc., and can solve the problems of reduced activity of catalytic hydrogen evolution reaction and reduction of material active sites

Active Publication Date: 2022-04-15
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the control of the amount of doping and the maintenance of the morphology still need to be solved. These problems lead to the reduction of the active sites of the doped material and the reduction of the catalytic hydrogen evolution reaction activity.

Method used

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  • n-doped porous carbon-coated mop nanorod material and its preparation method and application
  • n-doped porous carbon-coated mop nanorod material and its preparation method and application
  • n-doped porous carbon-coated mop nanorod material and its preparation method and application

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preparation example Construction

[0022] The invention provides a method for preparing an N-doped porous carbon-coated MoP nanorod material, comprising:

[0023] 1) MoO 3 Nanorods, surfactants, zinc sources, and dimethylimidazole are contacted in a solvent to prepare precursor powders;

[0024] 2) The precursor powder is calcined and carbonized under a protective gas, and then the calcined carbonized product is subjected to phosphating treatment to obtain a MoP nanorod material coated with N-doped porous carbon.

[0025] In step 1), the amount of each material can be selected in a wide range, but in order to improve the catalytic activity of the prepared MoP nanorod material, preferably, in step 1), MoO 3 The dosage ratio of nanorods, surfactant, zinc source and dimethylimidazole is 0.1g: 0.2-0.5g: 1-4mmol: 10-30mmol.

[0026] In step 1), the amount of solvent can be selected in a wide range, but in order to improve the catalytic activity of the prepared MoP nanorod material, preferably, in step 1), MoO 3 T...

preparation example 1

[0049] MoO 3 Preparation of nanorods:

[0050] Weigh 1.05g of ammonium molybdate and dissolve it in a mixed solution of 30ml of concentrated nitric acid and water (composed of 60-70% by weight of concentrated nitric acid and water with a volume ratio of 1:5), stir for 30min and transfer to a 50ml reaction kettle, and then Put it in an oven and react at 200°C for 20h; then wash it three times with deionized water and absolute ethanol, and then dry it in an oven at 60°C for 48h to obtain MoO 3 nanorods, such as figure 1 As shown in a and b, it can be seen that MoO 3 The specifications of the nanorods are: the length is 5-10 μm, and the diameter is 200-500 nm.

preparation example 2

[0052] Preparation of MoPs

[0053] Will MoO 3 The nanorods were heated from 20°C to 800°C at a rate of 3°C / min in an Ar / H2 mixed atmosphere and held for 2 hours, and then cooled to 20°C at a rate of 3°C / min to obtain carbonized products.

[0054] Then carry out phosphating treatment: under the Ar / H2 mixed atmosphere, the upstream of the quartz boat is 50 mg of diammonium hydrogen phosphate, and the downstream is 10 mg of carbonized products; the temperature is raised from 20 ° C to 800 ° C at a rate of 5 ° C / min and kept for 2 hours, and then Cool down to 20°C at a rate of 5°C / min to obtain MoP, such as figure 2 Shown in c and d.

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Abstract

The invention discloses an N-doped porous carbon-coated MoP nanorod material, a preparation method and application thereof. The preparation method of the N-doped porous carbon coated MoP nanorod material includes: 1) MoO 3 The nanorods, surfactant, zinc source, and dimethylimidazole are contacted in a solvent to obtain a precursor powder; 2) the precursor powder is calcined and carbonized under a protective gas, and then the calcined and carbonized product is subjected to phosphating treatment to MoP nanorods coated with N-doped porous carbon were obtained. The N-doped porous carbon-coated MoP nanorod material has excellent catalytic activity, which enables it to be applied in HER electrocatalysis, and the preparation method has the advantages of simple operation, uniform and controllable morphology.

Description

technical field [0001] The invention relates to MoP nanomaterials, in particular to an N-doped porous carbon-coated MoP nanorod material and a preparation method and application thereof. Background technique [0002] Due to its clean, renewable and abundant natural resources, hydrogen is considered as one of the most promising energy carriers. Among various hydrogen production methods, the electrochemical hydrogen production method has attracted much attention due to its advantages of high efficiency, sustainability, and environmental protection. effect. [0003] To date, platinum-group noble metals have been regarded as commercial HER electrocatalysts, showing extremely low overpotentials. Unfortunately, their low abundance and high price limit their large-scale applications, so it is inevitable to develop earth-abundant high-performance HER electrocatalysts. [0004] Over the past few decades, many non-noble metal electrocatalysts have demonstrated superior HER activity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/19B01J27/24B01J35/00B01J37/08C01B25/08C01B32/05C25B1/04C25B11/091
CPCB01J37/086B01J35/0033B01J27/24B01J27/19C01B25/08C01B32/05C25B1/04C01P2004/03C01P2004/04C01P2002/72C01P2004/61C01P2004/62Y02E60/36
Inventor 耿保友王晓丹李文
Owner ANHUI NORMAL UNIV
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