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a mos 2 -rgo-nio@ni foam composite photoelectric catalytic hydrogen evolution material and preparation method

A mos2-rgo-nio, composite material technology, applied in chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., can solve the problems of high hydrogen evolution overpotential and poor material cycle stability.

Active Publication Date: 2022-08-05
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a 2 A sol composed of polyethylene glycol (PEG) was dip-coated on pre-oxidized nickel foam to construct a MoS-containing 2 , RGO and in-situ NiO foam Ni-based composite materials and their preparation methods to solve the problems of high hydrogen evolution overpotential and poor cycle stability of current electrocatalytic hydrogen production materials

Method used

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  • a mos <sub>2</sub> -rgo-nio@ni foam composite photoelectric catalytic hydrogen evolution material and preparation method
  • a mos <sub>2</sub> -rgo-nio@ni foam composite photoelectric catalytic hydrogen evolution material and preparation method
  • a mos <sub>2</sub> -rgo-nio@ni foam composite photoelectric catalytic hydrogen evolution material and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Dodemolybdenum phosphoric acid, methyl isothiourea and polysorbate were dissolved in 120 mL of deionized water at a weight ratio of 5:6:1 under constant stirring, and the mixed solution was transferred into polytetrafluoroethylene. lined stainless steel autoclave, hydrothermally treated at 180 °C for 24 h, the obtained MoS 2 Wash with deionized water, centrifuge, and vacuum dry for use. (2) RGO was prepared by treating natural graphite powder with a modified Hummer method. (3) Add 18g of PEG4000 to 100mL of deionized water, heat to dissolve, and dissolve the MoS obtained in step (1). 2 Take 0.4 g and 0.05 g of the RGO obtained in step (2) and disperse them in a PEG solution in turn, and ultrasonically treat them for 30 min to form a suspension sol. (4) The nickel foam was soaked in 0.2 M nitric acid solution for 30 min to obtain pre-oxidized NiO@Ni. (5) The NiO@Ni obtained in step (4) was immersed in the suspension sol obtained in step (3) for 2 min, then pulled ...

Embodiment 2

[0030] (1) Dissolve ammonium molybdate, thiourea and fatty acid glycerides in 120 mL of deionized water at a weight ratio of 4:7:1 under constant stirring, and transfer the mixed solution to a PTFE-lined stainless steel high pressure In the reaction kettle, hydrothermal treatment was performed at 160 °C for 30 h, and the obtained MoS 2 Wash with deionized water, centrifuge, and vacuum dry for use. (2) RGO was prepared by treating natural graphite powder with a modified Hummer method. (3) Add 16g PEG6000 to 100mL deionized water, heat to dissolve, and dissolve the MoS obtained in step (1). 2 Take 0.3 g and 0.06 g of the RGO obtained in step (2) and disperse them in the PEG solution in turn, and ultrasonically treat for 30 min to form a suspension sol. (4) The nickel foam was soaked in a 0.8 M hydrogen peroxide solution for 50 min to obtain pre-oxidized NiO@Ni. (5) The NiO@Ni obtained in step (4) was immersed in the suspension sol obtained in step (3) for 1 min, then pulled a...

Embodiment 3

[0032] (1) Dissolve sodium molybdate, vinyl thiourea and fatty acid sorbitan in 120 mL of deionized water at a weight ratio of 6:8:1 under constant stirring, and transfer the mixed solution into a polytetrafluoroethylene-lined In a stainless steel autoclave, the obtained MoS was hydrothermally treated at 170 °C for 26 h. 2 Wash with deionized water, centrifuge, and vacuum dry for use. (2) RGO was prepared by treating natural graphite powder with a modified Hummer method. (3) Add 20g PEG2000 to 100mL deionized water, heat to dissolve, and dissolve the MoS obtained in step (1). 2 Take 0.5 g and 0.07 g of the RGO obtained in step (2) and disperse them in the PEG solution in turn, and ultrasonically treat for 30 min to form a suspension sol. (4) The nickel foam was soaked in a solution of potassium permanganate with a concentration of 0.5 M for 40 min to obtain pre-oxidized NiO@Ni. (5) The NiO@Ni obtained in step (4) was immersed in the suspension sol obtained in step (3) for 3...

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Abstract

The present invention disclosed a solitary immersion coating method to prepare MOS 2 ORgo‑nio@ni bubble hydrogen analysis method and preparation method, including the following steps: (1) Molybdenum compounds, sulfur compounds and non -ion surface active agents (2‑10): (4‑12): 1 Weight ratio dissolved dissolvedIn the ion water, the water heat treatment at 140‑200 ° C is 16‑36 h, and MOS is obtained 2 ; (2) Use the improved Hummer method to handle the natural graphite powder for RGO; (3) soak the foam nickel to the concentration of 0.2‑1.0m in the solution of 20‑50min in the solution containing the oxidant, get NIO@ni; (4) The preparation will be preparedMOS 2 , RGO is scattered in the PEG solution, which is suspended solid solution; (5) NiO@ni on the suspended solid solid fluid through multiple impregnation, lifting, drying, and the procedure under the protection of the atmosphere is heated and baked.Catalytic hydrogen composite material.

Description

technical field [0001] The invention relates to a sol dip coating method for preparing MoS 2 -RGO-NiO@Ni foam hydrogen evolution composite material and preparation method, specifically involving the pre-oxidation of foamed nickel to obtain nickel-based nickel oxide, and the new preparation of MoS 2 , RGO is dispersed in a PEG solution to obtain a suspended sol solution, which is obtained by multiple dipping, pulling, drying, temperature-programmed roasting under atmosphere protection, and natural cooling after heat preservation in a reducing atmosphere. The prepared material shows excellent photoelectricity. Catalytic water splitting performance for hydrogen production. Background technique [0002] In order to develop renewable and clean energy, especially hydrogen (H 2 ) to replace traditional fossil fuels with new technologies that can replace traditional fossil fuels, scientific and technological workers have made a lot of efforts. Photocatalytic / electrocatalytic hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J35/00C25B1/04C25B11/091
CPCB01J27/0515C25B1/04C25B11/051B01J35/39B01J35/33Y02E60/36
Inventor 阎建辉黄杨张丽杨海华杨鹏
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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