Preparation method of chromium-doped cobalt phosphide nanorod array growing on carbon cloth in situ

A nanorod array and in-situ growth technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the difficulty of increasing high-performance electrodes, cannot meet large-scale production, low efficiency, etc. problems, to achieve the effect of regular arrangement, easy control of reaction conditions, and avoidance of pollution

Pending Publication Date: 2021-04-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional electrode preparation method is affected by factors such as the dispersion effect of cobalt phosphide particles in the solvent, the addition ratio of ionic polymers, and the uniformity of cobalt p

Method used

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  • Preparation method of chromium-doped cobalt phosphide nanorod array growing on carbon cloth in situ
  • Preparation method of chromium-doped cobalt phosphide nanorod array growing on carbon cloth in situ
  • Preparation method of chromium-doped cobalt phosphide nanorod array growing on carbon cloth in situ

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0065]Example 1

[0066](01) Tutting the carbon cloth into a size of 1 cm to 3 cm, soaked in a nitric acid solution of 6 mol / L, heating at 90 ° C for 6 h.

[0067](02) After the heating was stopped to room temperature, remove the carbon cloth, sequentially at 60 mL of acetone, 80 ml of ultra-pure water, 60 mL of ethanol, 30mins.

[0068](03) Outlet of the ultrasonic carbon cloth, 4 h in an oven at 65 ° C, resulting in clean, dry, hydrophilic reinforced carbon cloth.

[0069](04) CO 0.565G CO (NO3)2· 6h2O, 0.024G CR (NO3)3· 9h2O, 0.6G CO (NH2)20.186G NH4F is dissolved in 20 ml of ultra-pure water, stirred at room temperature for 1.5 h, resulting in a pale pink transparent solution.

[0070](05) Transferring the pale pink transparent solution obtained by step (04) to the conjugated, dry, hydrophilic enhanced carbon cloth, lid, dry, hydrophilic, enhanced carbon cloth, lid, dry, hydrophilic enhanced carbon fabric, lid, dry, dry, hydrophilic enhanced carbon fabric, lid of step (03) obtained by transf...

Example Embodiment

[0080]Example 2

[0081](01) cutting the carbon cloth into a size of 1 cm to 3 cm, soaking in a nitric acid solution of 8 mol / L, heating at 85 ° C for 6 h.

[0082](02) After the heating was stopped to room temperature, remove the carbon cloth, sequentially at 60 mL of acetone, 80 ml of ultra-pure water, 60 mL of ethanol, 30mins.

[0083](03) Outlet of the ultrasonic carbon cloth, 4 h in an oven at 65 ° C, resulting in clean, dry, hydrophilic reinforced carbon cloth.

[0084](04) 0.553 g of CO (NO3)2· 6h2O, 0.040g Cr (NO3)3· 9h2O, 0.6G CO (NH2)20.186G NH4F is dissolved in 20 ml of ultra-pure water, stirred at room temperature for 1.5 h, resulting in a pink transparent solution.

[0085](05) The pink transparent solution obtained by step (04) is transferred to the contextic fluoride reactor liner, vertically placed in a piece of step (03) obtained by clean, dry, hydrophilic enhanced carbon cloth, lid The lid is placed in a steel pressure jacket and assembles high pressure reactor.

[0086](06) Put t...

Example Embodiment

[0095]Example 3

[0096](01) cutting the carbon cloth into a size of 1 cm to 3 cm, soaking in a nitric acid solution of 6 mol / L, heating at 90 ° C for 8 h.

[0097](02) After the heating is heated to room temperature, take out the carbon cloth, sequentially at 70 mL of acetone, 100 mL of ultra-pure water, 70 ml of ethanol, 50mins.

[0098](03) Outlet of the ultrasonic carbon cloth, 4 h in an oven at 65 ° C, resulting in clean, dry, hydrophilic reinforced carbon cloth.

[0099](04) 0.541G CO (NO3)2· 6h2O, 0.056G CR (NO3)3· 9h2O, 0.6G CO (NH2)20.186G NH4F is dissolved in 20 ml of ultra-pure water, stirred at room temperature for 2 h, resulting in dark pink transparent solution.

[0100](05) The dark pink transparent solution obtained by step (04) is transferred to the polytetrafluoroethylene reactor liner, vertically placed in a piece of step (03) to obtain clean, dry, hydrophilic enhanced carbon cloth, cover Good cover is placed in a steel pressure jacket, assembles high pressure reactor.

[0101](0...

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Abstract

The invention aims to provide a preparation method of a chromium-doped cobalt phosphide nanorod array growing on carbon cloth in situ, which comprises the following specific steps of oxidizing the carbon cloth in nitric acid to enhance the hydrophilicity of the carbon cloth, and growing a layer of precursor CrxCo1-x(OH)F/CC on the carbon cloth in situ by a hydrothermal method, finally, converting the precursor growing on the carbon cloth into chromium-doped cobalt phosphide CrxCo1-x(OH)F/CC through a high-temperature gas-phase phosphating method. The preparation process is simple to operate, easy to control and low in cost and can be used for large-scale production, the chromium-doped cobalt phosphide nanorod array which grows on the carbon cloth in situ and is prepared by adopting the method is uniform in distribution and close in arrangement, the rod-like particle size reaches the nanoscale and is uniform in particle size, and the CoP crystal form is reserved while the free energy of hydrogen adsorption is reduced by chromium doping; the hydrogen evolution reaction can be efficiently, continuously and stably catalyzed.

Description

technical field [0001] The invention belongs to the technical field of preparation of micro-nano materials, and in particular relates to the preparation of a chromium-doped cobalt phosphide nanorod array grown on carbon cloth in situ. Background technique [0002] The traditional energy structure dominated by fossil fuels is experiencing the double crisis of resource depletion and environmental pollution. Human development urgently needs to solve the two major challenges of energy and environmental problems, forcing people to develop efficient, clean and sustainable green energy. As a clean energy with high energy density, wide sources, easy storage, and only water as a combustion product, hydrogen energy is expected to replace fossil fuels. Among various hydrogen production methods, hydrogen production by electrocatalytic water splitting has the advantages of wide sources of raw materials and various forms of energy utilization, and has gradually become a hot spot in curren...

Claims

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Application Information

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IPC IPC(8): B01J27/188B01J35/06C25B1/04C25B11/054C25B11/056C25B11/065C25B11/091
CPCY02E60/36
Inventor 庄仲滨张立鹏张俊涛
Owner BEIJING UNIV OF CHEM TECH
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