Water electrolysis catalysis material having palladium-nickel nanometer alloy structure

A technology of catalytic materials and nano-alloys, which is applied in the field of electrolytic water catalytic materials, can solve the problems of reduced catalytic efficiency, poor stability of transition metals, poor stability of electrocatalytic electrodes, and poor cycle performance, so as to facilitate diffusion and gas desorption , the effect of preventing agglomeration, good stability and durability

Inactive Publication Date: 2017-11-07
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, there are still many problems in the field of electrocatalytic hydrogen production with palladium-nickel alloy structure. One is the poor stability of transition metals in acid solution, which reduces the catalytic efficiency of the catalyst; the other is the stability and reliability of the electrode. cyclical problem
The stability and cycleability of electrocatalytic electrodes prepared by various methods are often poor, so the selection of good conductive substrate-supported catalysts is crucial for electrocatalysis.

Method used

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  • Water electrolysis catalysis material having palladium-nickel nanometer alloy structure
  • Water electrolysis catalysis material having palladium-nickel nanometer alloy structure
  • Water electrolysis catalysis material having palladium-nickel nanometer alloy structure

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Embodiment approach

[0033] An electrolytic water catalytic material with a palladium-nickel nano-alloy structure, the electrolytic water catalytic material is composed of a catalytic active substance and a carrier, the catalytic active substance is a palladium-nickel alloy nano particle, and the carrier is an ultrafine carbon fiber. The loading amount of the catalytic active substance on the carrier is 5-20wt%, and the size of the palladium-nickel alloy nanoparticles is 7-10nm. The fineness of the ultrafine carbon fiber is 50-1000nm.

[0034] The preparation method comprises the following steps:

[0035] 1) The superfine carbon fiber precursor is made into a spinning solution with a mass concentration of 5-15% with deionized water, and the precursor of the palladium-nickel alloy is respectively dissolved in the spinning solution, and then the spinning solution is electrospun Superfine fibers are prepared by the method; during electrospinning, the spinning voltage is controlled to be 8-20kV, the ...

specific Embodiment

[0039] Get 0.05g palladium chloride and 0.1g nickel nitrate and join in 11.2g polyvinyl alcohol aqueous solution (wherein the mass concentration of polyvinyl alcohol is 10%), adopt electrospinning method to this solution to spin then, control spinning voltage 12kV, the distance from the receiving device to the spinning needle is 12cm (that is, the receiving distance is 12cm), and the solution flow rate is 0.5mL / h, that is, ultrafine fibers are obtained.

[0040] Add 0.5g of superfine fiber to the corundum boat, and then place the corundum boat in the middle of the tube furnace;

[0041] First, the temperature was raised to 230° C. at 5° C. / min in air and maintained for 1 hour. One hour after the start of heating, argon (150 sccm) was bubbled. Then the sample was heated to 900°C at the same heating rate, kept for 8 hours, and finally cooled to room temperature under the protection of argon to obtain a palladium-nickel alloy structure / ultrafine carbon fiber hybrid material. The...

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Abstract

The invention discloses a water electrolysis catalysis material having a palladium-nickel nanometer alloy structure, wherein the water electrolysis catalysis material comprises a catalytic active material and a carrier, the catalytic active material is palladium-nickel alloy nanoparticles, and the carrier is ultrafine carbon fiber. The water electrolysis catalysis material of the present invention has high specific surface area and high porosity, is conducive to the electrolyte diffusion and the gas desorption, and provides the large contact area between the electrolyte and the catalytic site.

Description

technical field [0001] The invention relates to an electrolytic water catalytic material, in particular to an electrolytic water catalytic material with a palladium-nickel nano-alloy structure. Background technique [0002] Currently, hydrogen is efficient, clean and renewable, and is considered the most promising green energy. Hydrogen production by electrolysis of water is an efficient, environmentally friendly and one of the most promising methods for producing hydrogen. The hydrogen production reaction by electrolysis of water occurs on the surface of the catalytic electrode, including two basic half-reactions, the cathodic hydrogen evolution reaction and the anode oxygen evolution reaction. For hydrogen production by electrolysis of water, how to improve the activity of electrode catalytic materials, reduce the overpotential of hydrogen evolution and oxygen evolution, and improve the stability and durability of electrode materials are the focus and key of electrocataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J21/18B82Y30/00C25B1/04C25B11/06
CPCB01J21/18B01J23/892B82Y30/00C25B1/04C25B11/04Y02E60/36
Inventor 朱罕陈佳伟虞丹妮陈佳东张颂歌汪丽娜杜明亮
Owner ZHEJIANG SCI-TECH UNIV
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