Co@FePx-NCs material for alkaline solution hydrogen evolution as well as preparation method and application of Co@FePx-NCs material

A fepx-c2n4h4, hydrogen evolution technology, applied in the field of hydrogen energy, can solve the problems of high cost of electrolytic hydrogen desorption catalyst, complicated preparation method, etc., and achieve the effects of good coordination hydrogen activation energy, simple preparation method and high hydrogen evolution efficiency

Pending Publication Date: 2020-04-10
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a Co@FeP for hydrogen evolution in alkaline solution in order to overcome the defects of the above-mentioned prior art. x -NCs material and its preparation method and its application in electrocatalytic hydrogen evolution in alkaline solution to solve the problems of high cost and cumbersome preparation methods of existing electrolytic hydrogen evolution catalysts

Method used

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  • Co@FePx-NCs material for alkaline solution hydrogen evolution as well as preparation method and application of Co@FePx-NCs material
  • Co@FePx-NCs material for alkaline solution hydrogen evolution as well as preparation method and application of Co@FePx-NCs material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A Co@FeP x -NCs hydrogen evolution material, its preparation method is as follows:

[0042] 1) Mix 2mmol ferric chloride, 2mmol sodium hypophosphite, 16mmol dicyandiamide and 50ml ethanol and ultrasonically disperse for 30min to completely dissolve the solid to obtain a solution, then add 1mmol of cobalt acetate to the solution and ultrasonically disperse for 30min to completely dissolve the solid , to obtain a mixture;

[0043] 2) Put the mixed solution into an oil bath and heat and evaporate to dryness at 100°C to obtain CoP x / FeP x -C 2 N 4 h 4 mixture;

[0044] 3) Take 1g CoP x / FeP x -C 2 N 4 h 4 The mixture was soaked in 50mL of 0.33mol / L phosphoric acid solution and etched for 20h, then filtered, dried in vacuum at 60°C for 16h, and then calcined in a resistance furnace at 800°C for 2h under nitrogen atmosphere to obtain Co@FeP x -NCs hydrogen evolution material.

Embodiment 2

[0046] In this example, the Co@FeP prepared in Example 1 x -NCs hydrogen evolution material for electrocatalytic hydrogen evolution reaction, which specifically includes the following steps:

[0047] 1) Co@FeP prepared in Example 1 x -Grind the NCs hydrogen evolution material, and grind the surface of the glassy carbon electrode with 0.05 μm alumina to remove the residual sample, and rinse the glassy carbon electrode with ethanol and water in turn, and dry it;

[0048] 2) Prepare 1.0M potassium hydroxide solution, and feed nitrogen into the potassium hydroxide solution for 30 minutes to remove the air in the electrolyte, and obtain the electrolyte;

[0049] 3) Mix 0.5wt% Nafion solution with anhydrous methanol, weigh 1mg Co@FeP x - NCs hydrogen evolution material is dissolved in 100 μL Nafion solution and ultrasonically dispersed for two hours to obtain a hydrogen evolution solution, then absorb 12 μL hydrogen evolution solution and drop-coat it on the glassy carbon electrod...

Embodiment 3

[0053] A Co@FeP x -NCs hydrogen evolution material, its preparation method is as follows:

[0054] 1) Mix 2mmol ferric chloride, 5mmol sodium hypophosphite, 12mmol dicyandiamide and 60ml ethanol and ultrasonically disperse for 20min to completely dissolve the solid to obtain a solution, then add 0.75mmol cobalt acetate to the solution and ultrasonically disperse for 20min to completely dissolve the solid Dissolved to obtain a mixed solution;

[0055] 2) Put the mixed solution into an oil bath and heat and evaporate to dryness at 80°C to obtain CoP x / FeP x -C 2 N 4 h 4 mixture;

[0056] 3) Take 1g CoP x / FeP x -C 2 N 4 h 4 The mixture was soaked in 30mL of 1mol / L phosphoric acid solution and etched for 16h, followed by filtration, vacuum drying at 60°C for 18h, and high-temperature calcination in a resistance furnace at 650°C for 4h under nitrogen atmosphere to obtain Co@FeP x -NCs hydrogen evolution material.

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Abstract

The intention relates to a Co@ FePx-NCs material for alkaline solution hydrogen evolution and a preparation method and application thereof. The method comprises the steps that firstly, ferric chloride, sodium hypophosphite, dicyandiamide and ethyl alcohol are mixed and prepared into a solution, then a cobalt source is added into the solution and mixed evenly, and a mixed solution is obtained; by heating and evaporating the mixed solution to dryness, a CoPx/FePx-C2N4H4 mixture is obtained, finally by soaking the CoPx/FePx-C2N4H4 mixture in a phosphoric acid solution for etching, and sequentially filtering, drying and calcining, the Co@ FePx-NCs hydrogen evolution material is obtained. The Co@ FePx-NCs material can be used for electrocatalytic hydrogen evolution reaction. Compared with the prior art, the preparation method is simple, the raw material cost is low, the earth reserve of main elements is sufficient, the electrochemical performance of the electrode material is improved through the composite effect of two transition metals, and the Co@ FePx-NCs material has a wide industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of hydrogen energy, and relates to a Co@FeP used for hydrogen evolution in alkaline solutions x -NCs materials and their preparation methods and applications. Background technique [0002] Energy and the environment are the most important issues involved in the sustainable development of human society. At present, most of the world's energy demand comes from fossil fuels, which leads to the intense consumption of fossil fuels and also causes serious environmental pollution problems. It is an inevitable trend of development to gradually shift from fossil fuels to non-fossil energy sources with sustainable development and pollution-free. Due to its high combustion value and no combustion by-products, hydrogen has been widely valued by countries all over the world. The traditional hydrogen production methods include fossil fuel combustion hydrogen production and biomass hydrogen production, which consume a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C25B1/04C25B11/06
CPCB01J27/24B01J35/0033C25B1/04C25B11/095Y02E60/36
Inventor 蒋继波陈宇凯胡晓敏丛海山唐佳斌杨圆圆马健尹佳彬韩生
Owner SHANGHAI INST OF TECH
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