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Neutral and nearly-neutral water oxidation catalytic electrodes in transition metal salt nano arrays

A transition metal salt and nano-array technology, applied in the direction of electrodes, electrode shape/type, electrolysis process, etc., can solve the problems of low catalytic activity, high voltage of hydrogen production system, etc., and achieve the effect of reducing energy consumption and promoting development

Inactive Publication Date: 2017-05-10
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

[0003] In a neutral environment, the existing metal salt catalysts for water oxidation have low catalytic activity due to the limitation of their active specific surface area, so that the hydrogen production system still requires a high voltage (J.Am.Chem.Soc. , 2013, 135, 10492-10502)
The in situ conversion of precursors with nano-array morphology into metal salt-based water oxidation catalysts with high active specific surface area by electrochemical oxidation polarization has not been reported

Method used

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  • Neutral and nearly-neutral water oxidation catalytic electrodes in transition metal salt nano arrays
  • Neutral and nearly-neutral water oxidation catalytic electrodes in transition metal salt nano arrays
  • Neutral and nearly-neutral water oxidation catalytic electrodes in transition metal salt nano arrays

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Effect test

Embodiment 1

[0020] Step 1: Evenly disperse 1.45g of nickel nitrate and 1.40g of hexamethylenetetramine in 36ml of distilled water, and then transfer the above mixture into a 50ml polytetrafluoroethylene liner.

[0021] Step 2: Put the carbon cloth into the polytetrafluoroethylene lining in step 1, seal the lining with a stainless steel mold, and place it in a constant temperature drying oven at 100°C for 10 hours.

[0022] Step 3: After the reaction, cool down the reactor to room temperature, then take out the carbon cloth and wash it with distilled water and absolute ethanol. Dry in vacuum at 40°C for 24h to obtain Ni(OH) 2 Nanosheet arrays.

[0023] Step 4: Put the precursor prepared in Step 3 in a tube furnace, and react at 300° C. for 2 hours in an argon atmosphere to obtain a NiO nanosheet array.

[0024] Step 5: Use the NiO nanosheet array as the working electrode of the electrochemical workstation, the silver / silver chloride electrode, and the platinum electrode as the reference ...

Embodiment 2

[0027] Step 1: Dissolve 0.87g of cobalt nitrate hexahydrate, 0.29g of ammonium fluoride, and 0.9g of urea in 50ml of distilled water, and then transfer the mixture to 50ml of polytetrafluoroethylene lining.

[0028] Step 2: Put the titanium mesh into the polytetrafluoroethylene lining in step 1, seal the lining into a stainless steel mold, and place it in a constant temperature drying oven at 120° C. for 6 hours.

[0029] Step 3: After the reaction is completed, cool the reaction vessel to room temperature, take out the titanium mesh, wash it, and dry it in a vacuum drying oven at 40° C. for 24 hours.

[0030] Step 4: Place the dried sample in Step 3 and 0.5 g of sodium hydrogen hypophosphite in a tube furnace, and react at 300° C. for 2 hours in an argon atmosphere to obtain a CoP nanowire array.

[0031] Step 5: Use the CoP nanosheet array as the working electrode of the electrochemical workstation, the silver / silver chloride electrode, and the platinum electrode as the refe...

Embodiment 3

[0034] Step 1: Evenly disperse 1.42g of nickel nitrate and 1.38g of hexamethylenetetramine in 38ml of distilled water, and then transfer the above mixed liquid to a polytetrafluoroethylene liner. Step 2: Put the carbon cloth into the polytetrafluoroethylene lining in step 1, seal the lining with a stainless steel mold, and place it in a constant temperature drying oven at 100°C for 10 hours.

[0035] Step 3: After the reaction, cool down the reactor to room temperature, then take out the carbon cloth and wash it with distilled water and absolute ethanol. Dry in vacuum at 60°C for 24h to obtain Ni(OH) 2 Nanosheet arrays.

[0036] Step 4: Put the precursor prepared in Step 3 and 1g of sodium hypophosphite in a tube furnace, and react at 300°C for 2h in an argon atmosphere to obtain Ni 2 p.

[0037] Step Five: Use Ni 2 The P nanosheet array is used as the working electrode of the electrochemical workstation, and the silver / silver chloride electrode and the platinum electrode ...

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Abstract

The invention belongs to the field of hydrogen energy and fuel cell, and relates to conversion of transition metal compounds (including sulfides, phosphides, and oxides) nano arrays into metal salts (including borates, phosphates, carbonates, and compound systems thereof) nano arrays via electrochemistry oxidation polarization method, and electrochemistry water oxidation catalytic electrode at neutral and nearly-neutral environments. The electrochemistry water oxidation catalytic electrode possess larger active surface area and excellent electrolyte solution mass transfer performance, and is capable of reducing water oxidation energy barrier obviously, realizing low energy consumption water electrolysis hydrogen production, and promoting development of hydrogen production industry.

Description

technical field [0001] The invention belongs to the field of hydrogen energy and fuel cells. The in-situ conversion of transition metal compounds to transition metal salts (including borates, phosphates, carbonates and their composite systems) nano-arrays is realized by an electrochemical oxidation polarization method, and It is used as a catalytic electrode in neutral or near-neutral electrolyte solution for efficient and long-lasting water oxidation to produce hydrogen. Background technique [0002] Environmental and energy issues are hot topics in today's society. The global energy shortage and environmental pollution caused by the continuous consumption of fossil fuels force people to seek efficient, renewable and clean energy that can replace fossil fuels (Nat.Chem., 2009, 1, 112). Hydrogen has been widely concerned because of its high calorific value, wide source of raw materials, and non-polluting combustion products (Chem. Rev., 2010, 110, 6446-6473). Water electro...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06C25B11/02
CPCC25B1/04C25B11/02C25B11/051C25B11/073Y02E60/36
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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