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Low-energy-consumption electrochemical hydrogen production system based on difunctional nano array electrode

A nano-array, bi-functional catalysis technology, applied in electrodes, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low energy consumption and limited, and achieve broad application prospects, low energy consumption electrochemical hydrogen production, The effect of efficient electrochemical hydrogen production

Inactive Publication Date: 2017-03-15
成都玖奇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Replacing the water oxidation reaction with an electrochemical small molecule oxidation reaction that is easier to oxidize consumes less energy than the traditional electrolysis of water to produce hydrogen, but the current reported electrocatalytic system is limited by the use of noble metal catalytic materials (Nat.Commun.2014, 5, 4036) or limited catalytic current density (Angew.Chem.Int.Ed.2016, 55, 3804), and the work of low-energy hydrogen production based on non-noble metal nanoarrays of small molecule oxidation and hydroelectric reduction dual-functional catalytic electrodes has not been seen to report

Method used

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  • Low-energy-consumption electrochemical hydrogen production system based on difunctional nano array electrode
  • Low-energy-consumption electrochemical hydrogen production system based on difunctional nano array electrode
  • Low-energy-consumption electrochemical hydrogen production system based on difunctional nano array electrode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Add 36 mL of distilled water to the polytetrafluoroethylene liner, that is, add 1.45 g of nickel nitrate and 1.40 g of hexamethylene tetramine, and stir until the solid is completely dissolved to form a transparent solution.

[0021] Step 2: Put the nickel mesh into the lining of the reaction kettle in step 1, seal the PTFE lining into the stainless steel mold, place it in a constant temperature drying oven under closed conditions, and heat and react at 100° C. for 10 hours.

[0022] Step 3: After the reaction is completed, cool down to room temperature with the furnace, then take out the nickel mesh, wash with distilled water and anhydrous ethanol in turn, and arrange the washed carbon fibers in a vacuum drying box and vacuum dry at 40 ° C for 24 hours to obtain Ni(OH) 2 Nanosheet arrays.

[0023] Step 4: Place the precursor obtained in Step 3 in a tube furnace and add sodium hypophosphite, and react at 300°C for 2h in an argon atmosphere to obtain Ni 2 P nan...

Embodiment 2

[0026] Step 1: Add 35 mL of distilled water to the polytetrafluoroethylene liner, add 0.4 g of ferric chloride hexahydrate and 0.24 g of sodium sulfate and stir until the solid is completely dissolved.

[0027] Step 2: put the carbon cloth into the inner lining of the reaction kettle in step 1, and seal the PTFE lining into the stainless steel mold, place it in a constant temperature drying oven under closed conditions, and react at 120° C. for 6 hours.

[0028] Step 3: After the reaction is completed, cool down to room temperature with the furnace, then take out the carbon cloth, wash it, and arrange the washed carbon in a vacuum drying box and vacuum dry it at 40 ° C for 24 hours to obtain Fe 2 O 3 Nanosheet arrays.

[0029] Step 4: Prepare Fe from Step 3 2 O 3 The nanosheet array was placed in a tube furnace and potassium hypophosphite was added, and reacted at 300 °C for 2 h in an argon atmosphere to obtain FeP nanosheet array ( figure 2 ).

[0030] Step 5: Using two...

Embodiment 3

[0032] Step 1: add 40 mL of distilled water to the polytetrafluoroethylene lining, add 1 mmol of zinc nitrate, 2 mmol of cobalt nitrate, 0.074 g of ammonium fluoride and 0.3 g of urea, stir and dissolve to form a transparent solution.

[0033] Step 2: Put the conductive glass sheet into the lining of the reaction kettle in step 1, and seal the PTFE lining into the stainless steel mold, place it in a constant temperature drying oven under closed conditions, and heat it at 120 ° C for 6 hours. .

[0034] Step 3: After the reaction is completed, the glass sheet is taken out, washed, and the washed glass sheet is placed in a vacuum drying oven and dried at 40 ° C for 24 h to obtain a zinc-cobalt hydroxide array structure, and then dried in air for 400 Annealed at ℃ for 2 hours to obtain ZnCo 2 O 4 array of nanowires.

[0035] Step 4: Prepare ZnCo from Step 3 2 O 4 The nanowire array was placed in a tube furnace and potassium hypophosphite was added, and reacted at 320° C. for...

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Abstract

The invention discloses a transition metal compound (including phosphide, sulfide, selenide and nitride) nano array which is applied to low-energy-consumption electrochemical hydrogen production as a small-molecule electrooxidation and water-electricity reduction difunctional catalytic electrode and belongs to the fields of hydrogen energy and fuel cells. According to the transition metal compound nano array, the difunctional non-noble-metal array catalytic electrode is applied to small-molecule electrooxidation and water-electricity reduction simultaneously for the first time; an electrochemical oxygen evolution reaction is replaced with a small-molecule electrooxidation reaction low in oxidation potential, and a double-electrode electrolysis system based on the difunctional catalytic electrode is constructed; low-energy-consumption and stable electrochemical hydrogen production is achieved; and the transition metal compound nano array is applicable to large-scale industrial hydrogen production.

Description

technical field [0001] The invention belongs to the field of hydrogen energy and fuel cells, and more particularly, relates to the preparation of nano-arrays of transition metal compounds (including phosphides, sulfides, selenides and nitrides) as bifunctional catalytic electrodes for small molecule electro-oxidation and hydro-electric reduction for use in Electrochemical hydrogen production with low energy consumption. Background technique [0002] The massive consumption of fossil fuels has led to serious energy crisis and environmental problems, and finding efficient, renewable and clean energy to replace fossil fuels has become one of the most important challenges currently faced (Nature 2001, 414, 353). Hydrogen has attracted much attention due to its storable, efficient and clean characteristics (Acc. Chem. Res. 2012, 45, 767). At present, more than 95% of hydrogen comes from fossil fuels, and water electrolysis, as an important means of industrialized hydrogen produc...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06B01J27/043B01J27/057B01J27/185B01J27/24
CPCC25B1/04B01J27/043B01J27/0573B01J27/1853B01J27/24C25B11/077C25B11/091C25B11/075B01J35/33Y02P20/133Y02E60/36
Inventor 孙旭平罗永岚阳海
Owner 成都玖奇新材料科技有限公司
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