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Metal-doped CoP3 and preparation method and application thereof

A metal doping and metal technology, applied in the field of metal doped CoP3 preparation, can solve the problem of low intrinsic activity of cobalt triphosphide electrocatalytic hydrogen evolution, and achieve excellent electrocatalytic hydrogen evolution activity and stability

Active Publication Date: 2019-07-05
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Metal-doped CoP3 and preparation method and application thereof
  • Metal-doped CoP3 and preparation method and application thereof
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Embodiment 1

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

[0035] The first step: first soak the flexible carbon cloth in dilute nitric acid with a mass fraction of 15% for two hours to protonate it, then take out the flexible carbon cloth and wash it with water and anhydrous three times, and dry for 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 sequentially dissolved in 15mL of water, stirred at room temperature for 60 minutes to obtain a uniform solution, and then 5mL of 25wt% ammonia water was added to the above The solution was stirred for thirty minutes to obtain a homogeneous solution.

[0037] In the third step, transfer the uniform solution from the previous step into the inner tank of the 25mL PTFE reactor, and put th...

Embodiment 2

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

[0042] The first step: first soak the flexible carbon cloth in 15% dilute nitric acid for two hours to protonate it, then take out the flexible carbon cloth and wash it with water and alcohol three times and dry it for later use.

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

[0044] The third step: transfer the homogeneous solution into the inner tank of a 50mL polytetrafluoroethylene reactor, and put the dry spare flexible carbon cloth into the inner tank of the reactor vertically, seal the reactor, and react hydrothermally at 120°C for 6 hours. The carbon cloth is taken out, the sur...

Embodiment 3

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

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

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

[0051] Step 3: Transfer the homogeneous solution into the inner tank of a 50mL PTFE reactor, and put the washed dry spare flexible carbon cloth into the inner tank of the reactor vertically, seal the reactor, and heat it with water at 120℃ After rea...

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Abstract

The invention discloses metal-doped CoP3 and a preparation method and application thereof. A cobalt-based precursor doped with different metals and red phosphorus are mixed in a cobalt-phosphorus atomic ratio of (1:3)-(1:4), reacted for 3-5 hours under the vacuum condition of 5*10<-5>-5*10<-4> Pa at the temperature of 625-700 DEG C, and taken out to be soaked into pure CS2 for treatment so as to remove excessive phosphorus, and then the metal-doped CoP3 is obtained. According to the preparation method, CoP3 is doped with the metal elements for the first time, on-site growth of the CoP3 on thesurface of carbon cloth or other flexible materials is achieved, the electrocatalytic intrinsic activity of the CoP3 is improved, the problem that electrocatalyst powder needs to be fixed with naphthol or other polymer adhesives is solved, and the metal-doped CoP3 is suitable for large-scale electrocatalytic industrial hydrogen production.

Description

Technical field [0001] The invention belongs to the field of green sustainable industrial hydrogen production, and specifically relates 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 deterioration of 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, etc. It 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. The current industrial hydrogen production processes are mainly petrochemical catalytic cracking and natural gas steam reforming to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J27/188B01J27/198C25B1/04C25B11/06
CPCB01J27/198B01J27/188B01J27/1853C25B1/04C25B11/04B01J35/33Y02E60/36
Inventor 吴天利谭付瑞高跃岳张伟风
Owner HENAN UNIVERSITY
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