Flexible nano-porous/amorphous composite material for hydrogen production by electrolyzing water and preparation method thereof

An amorphous composite material, nanoporous technology, applied in the direction of electrode shape/type, electrode, electrolysis process, etc., can solve the problems of insufficient catalytic activity and low specific surface area of ​​the strip, and achieve good mechanical bending flexibility and simple preparation process Effect

Inactive Publication Date: 2018-10-26
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the common brittleness problems of bulk nanoporous electrocatalytic materials and the shortcomings of traditional amorphous bulk and strip materials with low specific surface area resulting in insufficient catalytic activity, and to provide a hydrogen production method for electrolysis of water. Flexible nanoporous / amorphous composite material and its preparation method

Method used

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  • Flexible nano-porous/amorphous composite material for hydrogen production by electrolyzing water and preparation method thereof
  • Flexible nano-porous/amorphous composite material for hydrogen production by electrolyzing water and preparation method thereof
  • Flexible nano-porous/amorphous composite material for hydrogen production by electrolyzing water and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] With Ni 40 Zr 40 Ti 20-x Pt x (x=0, x=1, x=2, x=3 and x=4) are used as the nominal composition of the precursor alloy, and the required elements are weighed and proportioned, and the pure elements (Ni 99.99 wt%, Zr 99.99wt%, Pt99.99wt%), converted into mass (5g) according to the atomic percentage of the alloy and weighed, and then adopting the method of high-purity argon atmosphere vacuum arc melting to obtain Ni 40 Zr 40 Ti 20-x Pt x(x=0, x=1, x=2, x=3 and x=4) master alloy button ingots are smelted for 3 to 4 times to ensure uniform composition of the master alloy ingots.

[0032] Ni 40 Zr 40 Ti 20-x Pt x (x=0, x=1, x=2, x=3 and x=4) the alloy ingot is heated and melted by induction, and then the molten metal liquid rises slowly so that it touches the tip of the high-speed rotating water-cooled copper roller, and the metal liquid is Rapidly flung out and rapidly cooled to prepare Ni 40 Zr 40 Ti 20-x Pt x (x=0, x=1, x=2, x=3 and x=4) alloy wires, the dia...

Embodiment 2

[0034] With Ni 40 Zr 40 Ti 20-x Pt x (x=0, x=1, x=2, x=3 and x=4) are used as the nominal composition of the precursor alloy, and the required elements are weighed and proportioned, and the pure elements (Ni 99.99 wt%, Zr 99.99wt%, Pt99.99wt%), converted into mass (5g) according to the atomic percentage of the alloy, and then adopting the method of high-purity argon atmosphere vacuum arc melting to obtain Ni with different precious metal contents 40 Zr 40 Ti 20-x Pt x (x=1, x=2, x=3 and x=4) master alloy button ingots are smelted 3 to 4 times to ensure uniform composition of the master alloy ingots.

[0035] The master alloy ingot is re-melted by induction heating with a medium-frequency power supply using a vacuum stripping device, and is continuously and rapidly sprayed onto a water-cooled rotating copper roller under the action of high-purity argon with a pressure of about 0.2MPa to prepare Ni 40 Zr 40 Ti 20-x Pt x (x=0, x=1, x=2, x=3 and x=4) thin alloy strips, t...

Embodiment 3

[0038] With Ni 40 Zr 40 Ti 20-x Au x (x=1, x=2, x=3 and x=4) are used as the nominal composition of the precursor alloy, and the required elements are weighed and proportioned, and the pure elements (Ni 99.99wt%, Zr 99.99wt%, Au99.99wt%), converted into mass (5g) according to the atomic percentage of the alloy, and then adopting the method of high-purity argon atmosphere vacuum arc melting to obtain Ni with different precious metal contents 40 Zr 40 Ti 20-x Au x (x=1, x=2, x=3 and x=4) master alloy button ingots are smelted 3 to 4 times to ensure uniform composition of the master alloy ingots.

[0039] The master alloy ingot is re-melted by induction heating with a medium-frequency power supply using a vacuum stripping device, and is continuously and rapidly sprayed onto a water-cooled rotating copper roller under the action of high-purity argon with a pressure of about 0.2MPa to prepare Ni 40 Zr 40 Ti 20-x Pt x (x=1, x=2, x=3 and x=4) thin alloy strips, the thicknes...

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Abstract

The invention provides a flexible nano-porous/amorphous composite material for hydrogen production by electrolyzing water and a preparation method thereof. A Ni-Zr-Ti (Pt, Au, Pd) amorphous alloy wire or a thin strip is used as a precursor, and Zr and Ti elements are selectively removed through surface dealloying, so that the composite material is prepared. The nano composite material has a double-continuous nano porous structure with a high specific surface area and an amorphous matrix layer, and meanwhile has good mechanical flexibility and can be bent at any angle of 180 degrees. The composite material is directly used for electrolyzing a hydrogen evolution electrode, and shows excellent hydrogen evolution electrocatalytic activity, and the performance is obviously superior to 10 wt%of commercial Pt/C catalysts. The flexible nano-porous/amorphous composite material not only can solve the problem that an existing block nano porous electrocatalytic material is generally brittle, but also can overcome the defect that because the specific surface area of a traditional amorphous block body and a strip is not high, the catalytic activity is insufficient, and has a great applicationprospect in the aspect of high-performance electrolytic water hydrogen production electrode devices.

Description

technical field [0001] The invention belongs to the field of preparation and application of clean and sustainable energy, and in particular relates to a flexible nanoporous / amorphous composite material for hydrogen production by electrolysis of water and a preparation method thereof. Background technique [0002] With the intensification of the world's energy crisis, the development of new energy is imminent. Among many new energy sources, hydrogen energy, as an efficient and clean energy source, has been widely concerned and applied in the 21st century. Hydrogen evolution reaction (HER: hydrogenevolution reaction) by electrolysis of water is an important means to realize industrial and cheap production of hydrogen. At present, the electrode materials used for HER generally have disadvantages such as high price, low specific surface area, and low electrocatalytic activity, which lead to high hydrogen evolution potential and high energy consumption of electrolytic electrodes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03C25B11/06C25B1/04C22C45/04C22C45/10C22C3/00
CPCC22C3/00C22C45/04C22C45/10C25B1/04C25B11/03C25B11/04Y02E60/36
Inventor 刘雄军李睿吕昭平王辉吴渊
Owner UNIV OF SCI & TECH BEIJING
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