CoPxOy nano-array composite material grown on surface of conductive substrate as well as preparation and application of CoPxOy nano-array composite material

A conductive base material and composite material technology, applied in the field of nano-array composite materials, can solve the problems of unsuitable large-scale production and application, environmental pollution, etc., and achieve the effects of good hydrogen production performance, improved precipitation rate, and accelerated transmission rate

Active Publication Date: 2020-06-09
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many literatures (Sun, X. et al. Adv. Mater. 2017, 29, 1602441; Yu, S. et al. Angew. Chem. Int. Ed. 2018, 57, 15445–15449; Chen, S. et al .Energy Environ.Sci.2018,11,2246–2252) and patent application descriptions (such as CN109518216A and CN108816258A) all require the process of phosphating in most of the cobalt phosphide preparation methods reported, and this process will produce highly toxic pH 3 Gas (Li, X. et al. Angew. Chem. Int. Ed. 2018, 57, 1–6), which seriously pollutes the environment and is not suitable for large-scale production and application

Method used

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  • CoPxOy nano-array composite material grown on surface of conductive substrate as well as preparation and application of CoPxOy nano-array composite material
  • CoPxOy nano-array composite material grown on surface of conductive substrate as well as preparation and application of CoPxOy nano-array composite material
  • CoPxOy nano-array composite material grown on surface of conductive substrate as well as preparation and application of CoPxOy nano-array composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A NF self-supporting superhydrophilic and superaerophobic CoP for hydrogen production from water electrolysis in alkaline solution x o y Nano array material, its preparation method is as follows:

[0037] 1) Cut the commercialized NF into 20×50mm rectangular slices, first wash them ultrasonically with hydrochloric acid (HCl), then ultrasonically wash them with distilled water, and finally wash them ultrasonically with ethanol. After washing, dry overnight in a vacuum oven at 60 °C. Hang the dried NF on a rubber stopper and store it in a vacuum oven at 60°C for later use.

[0038] 2) 2.2g CoCl 2 ·6H 2 O and 4.5 g NaH 2 PO 2 ·H 2 O was added to a test tube containing 50mL of isopropanol and ultrapure water with a volume ratio of 1:1, stirred and dissolved, and placed in N 2 Drain the air under the atmosphere, and after 15 minutes, seal it with the rubber stopper containing suspended NF in step 1), NF is completely immersed in the solution, and after sealing, send ...

Embodiment 2

[0046] With embodiment 1 step 2) in 60 Co gamma rays were changed to electron beams produced by an electron accelerator, the absorbed dose rate was 10kGy / pass, and the absorbed dose was 200kGy. Other conditions were the same as in Example 1, and NF@CoP for hydrogen production by electrolysis of water was obtained. x o y Catalytic material, where x=0.9, y=0.3.

Embodiment 3

[0048] Change the absorbed dose rate in step 2) of Example 1 to 10Gy / min, and other conditions are the same as in Example 1 to obtain NF@CoP for hydrogen production by electrolysis of water x o y Catalytic material where x=0.5, y=0.2.

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Abstract

The invention discloses a CoPxOy nano-array composite material grown on surface of a conductive substrate as well as preparation and an application of the CoPxOy nano-array composite material. A gammaray or electron beam radiation reduction and heat treatment method is adopted; an oxygen-doped cobalt phosphide (CoPxOy) nano array (x is greater than 0.5 and less than 1, and y is greater than 0.1 and less than 0.5) is grown on a conductive substrate in a regulated manner; the CoPxOy nano array structure has super-hydrophilic and super-oleophobic properties and is good in water electrolysis hydrogen production performance in an alkaline solution, the super-hydrophilic property accelerates the transmission rate of electrolyte to the surface of an electrode, and the super-oleophobic property improves the precipitation rate of hydrogen, so that the overpotential of HER is further reduced; the oxygen-doped cobalt phosphide enriches the electron density, so that the conductivity is improved,the transmission rate of the electrolyte is increased, and the catalytic hydrogen evolution performance is improved. Moreover, a radiation method can be initiated at room temperature, does not need toadd an initiator, is efficient and easy in condition control, does not generate highly toxic PH3 gas in the preparation process, is environment-friendly, and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of nano-array composite materials, in particular to growing CoP on the surface of a conductive substrate x o y Nano-array material, as well as the preparation method and application of the composite material. Background technique [0002] Hydrogen has become one of the future fossil energy substitutes due to its advantages of high energy density (120MJ / Kg), environmental protection and renewability. At present, electrolysis of water to catalyze hydrogen evolution (Hydrogen Evolution Reaction, HER) is a widely used scheme in hydrogen production technology. However, this reaction has a high overpotential at the cathode, leading to a substantial increase in the cost of producing hydrogen. At present, the commercially used catalysts that can efficiently reduce the overpotential are mainly metal platinum and its compounds, but due to its limited reserves on the earth and high development costs, its further development a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J37/34B01J37/08C25B11/06C25B1/04
CPCB01J27/1853B01J35/0033B01J35/023B01J37/08B01J37/34B01J37/347C25B1/04C25B11/091Y02E60/36
Inventor 李久强陈熙邦彭静翟茂林
Owner PEKING UNIV
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