CN109825843A - A kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire - Google Patents
A kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire Download PDFInfo
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- CN109825843A CN109825843A CN201910078164.9A CN201910078164A CN109825843A CN 109825843 A CN109825843 A CN 109825843A CN 201910078164 A CN201910078164 A CN 201910078164A CN 109825843 A CN109825843 A CN 109825843A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
A kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire, belongs to electro-catalysis hydrogen preparation field.The present invention utilizes chemical vapor deposition method, polycrystal GaN nano wire/base material structure of preparation can be directly as electro-catalysis hydrogen manufacturing electrode, it can be used to electro-catalysis hydrogen manufacturing without the load of any catalyst or surface modification, and show excellent electro-catalysis hydrogen manufacturing performance.Polycrystal GaN nanowire diameter is 90-200nm, length is 4-30 μm, surface topography is coarse, show as pyramid island structure, there is defect abundant can provide a large amount of active site in the catalytic process of electrolysis water with the raised structures perpendicular to nano wire axial direction simultaneously, be conducive to the diffusion of electrolyte and the generation of gas and desorption.Present invention firstly provides using polycrystal GaN nano wire as electrocatalytic hydrogen evolution material, this provides brand-new thinking to explore novel electro-catalytic material, also opens new road to research and develop the novel performance for the commercial material for having realized large-scale production.
Description
Technical field
The present invention is a kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire, belongs to electro-catalysis hydrogen manufacturing neck
Domain.
Background technique
Population in the world is continuously increased now, and energy demand is growing, and the excessive use of fossil energy brings energy storage
Measure crisis and serious environmental problem.The exploitation of new and renewable energy is extremely urgent, and hydrogen energy source is then renewable energy
In putative ideal energy carrier, have a characteristic that nontoxic, light-weight, thermal conductivity is good, utilization rate is high, side
Just transport etc..Therefore, the development and utilization of hydrogen energy source becomes the research hotspot of the every field such as scientific research and commodity production.
The method of electrocatalytic hydrogen evolution is current most promising Hydrogen Energy production technology, replaces fossil energy, reduces discharge
One of important channel.The energy conversion of electrocatalytic hydrogen evolution and the core of storage are electrocatalysis materials, ideal electrocatalysis material
Have following characteristics: high activity, high stability, low cost.Currently, electrocatalysis material mainly has following four: (1) noble metal
Class: Pt, Ir, Ni etc.；(2) metal carbides: MoxC、WxC、VxC etc.；(3) alloy type: Pt- other metals, transition metal alloy
Deng；(4) semi-conductor type oxide: RuO2、Ni(OH)2、NiC2O4Deng.Wherein it is anti-to be typically considered liberation of hydrogen for precious metal material
Answer most effective elctro-catalyst, but its scarcity of resources, the expensive practical application limited as electrocatalytic hydrogen evolution agent,
His several catalysis materials are equally the popular research material of electro-catalysis, but are difficult to advise greatly there is also at high cost or complex process
The problems such as mould produces.
Gallium nitride (GaN) be used as typical third generation semiconductor, have high electron mobility, good electrical and thermal conductivity,
Many excellent physical and chemical properties such as high breakdown field strength, preferable radiation resistance and resistance to chemical corrosion, have been answered at present
It is multi-field for LED luminous, electronic component, sensor etc., and commercialization is being realized over the last number of years.However almost without
People studies GaN material in the application in electro-catalysis field, explores the novel performance for having been carried out the commercial material of large-scale production, is
The target of the countless unremitting pursuits of researcher.
Present invention firstly provides using polycrystal GaN nano wire as electrocatalytic hydrogen evolution material, and pass through low cost, technique
The simple chemical vapor deposition method of process directly grows one layer of polycrystal GaN nano wire vertically on different substrates.It will be made
Standby polycrystal GaN nano wire, directly as self-supporting electro-catalysis hydrogen manufacturing electrode, is loaded together with substrate without any catalyst
Or surface modification, then embody excellent electro-catalysis hydrogen manufacturing performance.This provides brand-new thinking to explore novel electro-catalytic material,
Also realized that the novel performance of the commercial material of large-scale production opens new road for research and development.
Summary of the invention
The purpose of the present invention is to provide a kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire.It is this
GaN nano wire is polycrystalline structure, and surface topography is coarse, the raised structures with defect abundant and perpendicular to nano wire axial direction,
A large amount of active site can be provided in the catalytic process of electrolysis water, be conducive to the diffusion of electrolyte and the generation of gas and taken off
It is attached, there is very low electrocatalytic hydrogen evolution current potential in alkaline environment, and the good electro-catalysis such as show high activity and high stability
Performance.
The present invention is to provide a kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire, it is characterised in that
The following steps are included:
(1) base material: Carbon materials or metal class conductive material is selected；
(2) in the substrate selected in step (1), one layer of polycrystal GaN nanometer is deposited using chemical vapour deposition technique
Line obtains polycrystal GaN nano wire/base material electrode structure.
Preferably, substrate described in step (1) is graphite flake, glass carbon plate, carbon cloth, foam copper, foamed aluminium or bubble
Any one in foam nickel.
Preferably, the diameter of polycrystal GaN nano wire described in step (2) is 90-200nm, and length is 4-30 μm.
Preferably, polycrystal GaN nano wire described in step (2) is grown with 10-90 ° of angle vertically on substrate.
The present invention is by the structure of polycrystal GaN nano wire/base material obtained in step (2) directly as electro-catalysis system
Hydrogen electrode carries out electro-catalysis hydrogen manufacturing test in alkaline environment, has very low electrocatalytic hydrogen evolution current potential, and show high activity
With the good electrocatalysis characteristic such as high stability.
The present invention has the following advantages that and benefit:
1. GaN nano wire prepared by is polycrystalline structure, and diameter 90-200nm, 4-30 μm of length, surface topography is coarse, table
Now it is pyramid island structure, while there is defect abundant and the raised structures perpendicular to nano wire axial direction, can be electrolysed
A large amount of active site is provided in the catalytic process of water, is conducive to the diffusion of electrolyte and the generation of gas and desorption.
2. polycrystal GaN nano wire/base material structure prepared by can carry out electrocatalytic hydrogen evolution directly as electrode
Reaction.
3. polycrystal GaN nano wire/base material self-supporting electrode prepared by alkaline environment there is very low electricity to urge
Change hydrogen-evolution overpotential, and the good electrocatalysis characteristic such as show high activity and high stability.
4. polycrystal GaN nano wire/base material self-supporting electrode preparation cost prepared by is low, and process flow is simple,
It is easy to be mass produced.
Detailed description of the invention
Fig. 1 is the SEM spectrum of polycrystal GaN nano wire prepared by embodiment 1
Fig. 2 is the SEM spectrum of polycrystal GaN nano wire prepared by embodiment 2
Fig. 3 is the XRD spectrum of polycrystal GaN nano wire prepared by embodiment 1
Fig. 4 is the TEM map and HRTEM map of polycrystal GaN nano wire prepared by embodiment 1
Fig. 5 is graphite flake, monocrystalline gan powder/graphite flake, prepared by monocrystalline GaN nano wire/graphite flake and embodiment 1
Linear scan polarization curve (the linear scan of embodiment 2,3 of polycrystal GaN nano wire/graphite flake during electrocatalytic hydrogen evolution
Polarization curve and embodiment 1 are substantially similar)
Specific embodiment:
Below by the embodiment substantive distinguishing features that the present invention is furture elucidated, but the present invention is not in any way limited to following reality
Apply example.
Embodiment 1
1. depositing one layer of polycrystal GaN nano wire, GaN nano wire using chemical vapour deposition technique in graphite flake substrate
Diameter is 130nm, and length is 5-13 μm, is grown with 10-90 ° of angle vertically on substrate, obtains polycrystal GaN nano wire/stone
The electrode structure of ink sheet.
2. in alkaline environment, by the nano wire of polycrystal GaN prepared by step 1/graphite flake self-supporting electrode directly as
The cathode of electrocatalytic hydrogen evolution carries out electrocatalytic hydrogen evolution experiment.
Embodiment 2
1. in carbon cloth substrate, one layer of polycrystal GaN nano wire is deposited using chemical vapour deposition technique, GaN nanometers
Linear diameter is 90nm, and length is 4-8 μm, is grown with 10-90 ° of angle vertically on substrate, obtains polycrystal GaN nano wire/carbon
The electrode structure of fiber cloth.
2. the nano wire of polycrystal GaN prepared by step 1/carbon cloth self-supporting electrode is directly made in alkaline environment
Electrocatalytic hydrogen evolution experiment is carried out for the cathode of electrocatalytic hydrogen evolution.
Embodiment 3
1. depositing one layer of polycrystal GaN nano wire, GaN nano wire using chemical vapour deposition technique in foam nickel base
Diameter is 200nm, and length is 10-30 μm, is grown with 10-90 ° of angle vertically on substrate, obtains polycrystal GaN nano wire/bubble
The electrode structure of foam nickel.
2. in alkaline environment, by the nano wire of polycrystal GaN prepared by step 1/nickel foam self-supporting electrode directly as
The cathode of electrocatalytic hydrogen evolution carries out electrocatalytic hydrogen evolution experiment.
Claims (5)
1. a kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire, which comprises the following steps:
(1) base material: Carbon materials or metal class conductive material is selected；
(2) in the substrate selected in step (1), one layer of polycrystal GaN nano wire is deposited using chemical vapour deposition technique, is obtained
To polycrystal GaN nano wire/base material electrode structure.
2. a kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire according to claim 1, feature exist
In: substrate described in step (1) is any in graphite flake, glass carbon plate, carbon cloth, foam copper, foamed aluminium or nickel foam
It is a kind of.
3. a kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire according to claim 1, feature exist
In: the diameter of polycrystal GaN nano wire described in step (2) is 90-200nm, and length is 4-30 μm.
4. a kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire according to claim 1, feature exist
In: polycrystal GaN nano wire described in step (2) is grown with 10-90 ° of angle vertically on substrate.
5. a kind of self-supporting electro-catalysis hydrogen manufacturing electrode based on polycrystal GaN nano wire according to claim 1, feature exist
In: by polycrystal GaN nano wire/base material self supporting structure obtained in step (2) directly as electro-catalysis hydrogen manufacturing electrode,
Carry out electro-catalysis hydrogen manufacturing.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835766A (en) * | 2019-11-19 | 2020-02-25 | 南京集芯光电技术研究院有限公司 | Surface plasmon enhanced InGaN/GaN multi-quantum well photoelectrode and preparation method thereof |
| CN113903932A (en) * | 2021-08-27 | 2022-01-07 | 北京工业大学 | Three-dimensional carbon structure supported platinum catalyst and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185578A (en) * | 2017-06-05 | 2017-09-22 | 天津大学 | In the GaN nano wire catalysis material and preparation method and application of sheet metal Grown |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185578A (en) * | 2017-06-05 | 2017-09-22 | 天津大学 | In the GaN nano wire catalysis material and preparation method and application of sheet metal Grown |
Non-Patent Citations (1)
| Title |
|---|
| TOMOE HAYASHI ET AL.: "High Stability and Efficiency of GaN Photocatalyst for Hydrogen Generation from Water", 《 JAPANESE JOURNAL OF APPLIED PHYSICS》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835766A (en) * | 2019-11-19 | 2020-02-25 | 南京集芯光电技术研究院有限公司 | Surface plasmon enhanced InGaN/GaN multi-quantum well photoelectrode and preparation method thereof |
| CN110835766B (en) * | 2019-11-19 | 2021-03-23 | 南京集芯光电技术研究院有限公司 | Surface plasmon enhanced InGaN/GaN multi-quantum well photoelectrode and preparation method thereof |
| CN113903932A (en) * | 2021-08-27 | 2022-01-07 | 北京工业大学 | Three-dimensional carbon structure supported platinum catalyst and preparation method thereof |
| CN113903932B (en) * | 2021-08-27 | 2024-02-06 | 北京工业大学 | Three-dimensional carbon structure supported platinum catalyst and preparation method thereof |
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