A metal-doped cop 3 , its preparation method and application

A metal doping and reaction kettle technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem of low intrinsic activity of cobalt triphosphide electrocatalytic hydrogen evolution, etc. The effect of catalytic hydrogen evolution activity and stability

Active Publication Date: 2021-05-07
HENAN UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

[0004] In order to meet the requirements of cobalt triphosphide electrocatalysts for industrial hydrogen production, the present invention aims to solve the problem that the intrinsic activity of cobalt triphosphide electrocatalytic hydrogen evolution is not high, and further improve its intrinsic activity by doping metal atoms to meet the requirements of non-noble metal electrocatalysts. Catalyst industrial hydrogen production requirements

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  • A metal-doped cop <sub>3</sub> , its preparation method and application
  • A metal-doped cop <sub>3</sub> , its preparation method and application
  • A metal-doped cop <sub>3</sub> , its preparation method and application

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Embodiment 1

[0034] In this embodiment, self-supporting growth of vanadium-doped cobalt triphosphide nanosphere electrode on flexible carbon cloth and electrocatalytic hydrogen evolution test include the following steps:

[0035] Step 1: Soak the flexible carbon cloth in dilute nitric acid with a mass fraction of 15% for two hours to protonize it, then take out the flexible carbon cloth and wash it three times with water and anhydrous, and dry it for later use.

[0036]In the second step, 1.309g of cobalt nitrate hexahydrate, 0.136g of vanadium sulfate heptahydrate and 0.2g of ammonium nitrate were successively dissolved in 15mL of water, stirred at room temperature for 60 minutes to obtain a uniform solution, and then 5mL of ammonia water with a mass fraction of 25wt% was added to the above The solution was stirred for thirty minutes to obtain a homogeneous solution.

[0037] The third step is to transfer the homogeneous solution in the previous step into a 25mL polytetrafluoroethylene re...

Embodiment 2

[0041] In this embodiment, the self-supporting growth of chromium-doped cobalt triphosphide nanowire array electrode on flexible carbon cloth and the electrocatalytic hydrogen evolution test include the following steps

[0042] Step 1: Soak the flexible carbon cloth in dilute nitric acid with a mass fraction of 15% for two hours to protonize it, then take out the flexible carbon cloth and wash it with water and alcohol for three times and dry it for later use.

[0043] Step 2: Dissolve 0.523g of cobalt nitrate hexahydrate, 0.078g of chromium sulfate, 0.186g of ammonium fluoride and 0.6g of urea in 40mL of ultrapure water in sequence, and stir at room temperature for 30 minutes to obtain a uniform solution.

[0044] Step 3: Transfer the uniform solution into a 50mL polytetrafluoroethylene reactor liner, put the dry spare flexible carbon cloth vertically into the reactor liner, seal the reactor well, and conduct a hydrothermal reaction at 120°C for 6 hours. The carbon cloth was ...

Embodiment 3

[0048] In this embodiment, self-supporting growth of nickel-doped cobalt triphosphide nanosheet array electrode on flexible carbon cloth and electrocatalytic hydrogen evolution test include the following steps

[0049] Step 1: Soak the flexible carbon cloth in dilute nitric acid with a mass fraction of 15% for two hours to protonize it, then take out the flexible carbon cloth and wash it three times with water and absolute ethanol to dry it for later use.

[0050] Step 2: Dissolve 2.095g of cobalt nitrate hexahydrate, 0.233g of nickel nitrate hexahydrate, 0.106g of ammonium fluoride and 1.2g of urea in 40mL of ultrapure water, and stir at room temperature for 60 minutes to obtain a uniform solution.

[0051] Step 3: Transfer the uniform solution into a 50mL polytetrafluoroethylene reactor liner, and put the washed dry spare flexible carbon cloth vertically into the reactor liner, seal the reactor, and heat it at 120°C After reacting for 22 hours, the carbon cloth was taken out...

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Abstract

The invention discloses a metal-doped CoP 3 , its preparation method and application. In the present invention, cobalt-based precursors doped with different metals and red phosphorus are mixed according to the atomic ratio of cobalt and phosphorus in the range of 1:3 to 1:4. ‑5 ~5×10 ‑4 React for 3-5 hours under Pa vacuum condition, then take out and immerse in pure CS 2 It can be obtained by removing excess phosphorus after intermediate treatment. The present invention firstly doped metal elements into cobalt triphosphide, and realized its in-situ growth on the surface of flexible materials such as carbon cloth, and improved the electrocatalytic performance of cobalt triphosphide. It can avoid the problem that the powder electrocatalyst needs to be fixed with a polymer binder such as naphthol, and is suitable for the application of large-scale electrocatalytic industrial hydrogen production.

Description

technical field [0001] The invention belongs to the field of green and sustainable industrial hydrogen production, in particular to a metal-doped CoP 3 , its preparation method and application. Background technique [0002] With the gradual depletion of traditional fossil energy such as oil and coal and the deteriorating environmental problems, the traditional energy structure system based on fossil energy is facing unprecedented crises and challenges (Majumdar et al., Nature, 2012, 488, 294 ). Hydrogen has the advantages of high energy density, excellent combustion performance, clean and pollution-free, and is the best alternative green energy for traditional fossil energy (Jaramillo et al., Science, 2017, 355, eaad4998). However, the utilization of hydrogen energy largely depends on the development of hydrogen production technology. At present, industrial hydrogen production processes are mainly petrochemical catalytic cracking and natural gas steam reforming. This proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J27/188B01J27/198C25B1/04C25B11/091C25B11/065
CPCB01J27/1853B01J27/188B01J27/198B01J35/0033C25B1/04C25B11/04Y02E60/36
Inventor 吴天利谭付瑞高跃岳张伟风
Owner HENAN UNIVERSITY
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