Preparation method of a gas-conducting and hydrogen-evolving material with a gradually expanding pore structure

A pore structure and hydrogen material technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of high-purity hydrogen collection difficulties, high energy consumption, low efficiency, etc., and achieve excellent space efficiency. Effects on catalytic activity and gas conduction performance

Active Publication Date: 2021-03-26
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For alkaline water electrolysis hydrogen non-noble metal electrodes, the step of water molecules discharging on the electrode to generate adsorbed hydrogen atoms is the slowest step in the alkaline water electrolysis hydrogen reaction process, and the alkaline water electrolysis hydrogen reaction needs to be driven by a higher overpotential, Therefore, there is a technical bottleneck of high energy consumption and low efficiency in the alkaline water electrolysis hydrogen process
In addition, during the hydrogen precipitation process of alkaline water electrolysis, as the partial pressure of hydrogen increases, due to the uncertainty of the diffusion and transmission direction of hydrogen in the solution, it is easy to mix with the oxygen precipitated at the anode during alkaline water electrolysis, resulting in Difficulties in collecting high-purity hydrogen in alkaline water electrolysis hydrogen process

Method used

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  • Preparation method of a gas-conducting and hydrogen-evolving material with a gradually expanding pore structure
  • Preparation method of a gas-conducting and hydrogen-evolving material with a gradually expanding pore structure
  • Preparation method of a gas-conducting and hydrogen-evolving material with a gradually expanding pore structure

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preparation example Construction

[0029] refer to figure 1 , the invention provides a method for preparing a gas-conducting and hydrogen-evolving material with a gradually expanding pore structure, comprising the following steps:

[0030] Step [1] Gradient-step composite electrodeposition of nickel, samarium and terbium with carbon fibers and carbon particles, specifically including the following operations:

[0031] a1. Preparation of composite electrodeposition solution: nickel formate, samarium trifluoromethanesulfonate, terbium nitrate hexahydrate, potassium dodecyl sulfate, carbon particles (5-10 μm in particle size) and carbon fibers (150-200 nm in diameter) , length of 10-30 μm) into deionized water, ultrasonically stirred for 2-6 hours to form a uniform suspension, and then added chloral to complete the preparation of the composite electrodeposition solution, the concentration of nickel formate in the composite electrodeposition solution 180-270g / L, samarium trifluoromethanesulfonate concentration 90-...

Embodiment 1

[0044] Preferred Embodiment 1 of the present invention provides a method for preparing a gas-conducting and hydrogen-evolving material with a gradually expanding pore structure, comprising the following steps:

[0045] Step [1] Gradient-step composite electrodeposition of nickel, samarium and terbium with carbon fibers and carbon particles, specifically including the following operations:

[0046] a1. Preparation of composite electrodeposition solution: nickel formate, samarium trifluoromethanesulfonate, terbium nitrate hexahydrate, potassium dodecyl sulfate, carbon particles (6 μm in particle size) and carbon fibers (180 nm in diameter and 25 μm in length) ) into deionized water, ultrasonically stirred for 4 hours to form a uniform suspension, then added chloral, thereby completing the preparation of the composite electrodeposition solution, the concentration of nickel formate in the composite electrodeposition solution was 200g / L, trifluoromethane The concentration of samari...

Embodiment 2

[0087] The preferred embodiment 2 of the present invention provides a method for preparing a gas-conducting and hydrogen-evolving material with a gradually expanding pore structure, comprising the following steps:

[0088]Step [1] Gradient-step composite electrodeposition of nickel, samarium and terbium with carbon fibers and carbon particles, specifically including the following operations:

[0089] a1. Preparation of composite electrodeposition solution: nickel formate, samarium trifluoromethanesulfonate, terbium nitrate hexahydrate, potassium dodecyl sulfate, carbon particles (6 μm in particle size) and carbon fibers (160 nm in diameter and 12 μm in length) ) into deionized water, ultrasonically stirred for 2 hours to form a uniform suspension, then added chloral, thereby completing the preparation of the composite electrodeposition solution, the concentration of nickel formate in the composite electrodeposition solution was 182g / L, trifluoromethane The concentration of sam...

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Abstract

The invention provides a preparation method of a gas guide hydrogen evolution material with a gradually-expanded pore channel structure. The preparation method comprises the following steps: step [1]nickel samarium terbium and carbon fiber and carbon particle gradient step composite electrodeposition; [2] removing the carbon template, reducing nickel oxide, and carrying out diffusion heat treatment on samarium and terbium elements; [3] loading Sm2-xTbxO3 / MoSe2 on the nickel samarium terbium alloy through bipolar electrodeposition; and (4) removing Se atoms to form the nickel samarium terbiumalloy loaded Sm2-xTbxO3 / MoSe2x composite material. The hydrogen evolution material prepared by the method has excellent space one-way catalytic activity and gas guide performance on hydrogen evolutionof an electrolytic alkaline aqueous solution, so that the material can realize low-energy-consumption and high-efficiency alkaline aqueous solution electrolysis hydrogen evolution production and high-purity hydrogen collection functions.

Description

technical field [0001] The invention relates to the field of hydrogen production materials by electrolysis of alkaline aqueous solution, in particular to a preparation method of a gas-conducting hydrogen evolution material with a gradually expanding pore structure that can be used for the production of hydrogen by electrolysis of alkaline aqueous solution and the collection of high-purity hydrogen. Background technique [0002] Hydrogen energy is not only a green and environmentally friendly high-efficiency energy source, but also can adjust the energy structure and promote industrial transformation. Alkaline water electrolysis hydrogen production is a relatively mature large-scale industrial electrolysis water technology at present. The main process of alkaline water electrolytic hydrogen analysis involves the steps of water molecules discharging at the electrode to generate adsorbed hydrogen atoms, and the adsorbed hydrogen atoms combine to form hydrogen molecules. Desorpti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/091C25B1/04B01J27/057B01J37/34
CPCB01J27/0573B01J35/0033B01J37/348C25B1/04Y02E60/36
Inventor 赵明王辉李建国
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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