Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hollow core-shell Pt@Ni/graphene three-dimensional composite catalyst and preparation method

A three-dimensional composite, graphene technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the difficult controllable preparation of composite catalyst particles, reaction time long, high reaction temperature, etc., to achieve the effect of increasing the effective specific surface area, improving the utilization rate, and improving the catalytic efficiency

Active Publication Date: 2015-05-27
QINGDAO UNIV
View PDF7 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solution method requires the use of surfactants as dispersants, the reaction time is longer (≥10h) or the reaction temperature is higher, and it is difficult to achieve the controllable preparation of the size and shape of the composite catalyst particles.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hollow core-shell Pt@Ni/graphene three-dimensional composite catalyst and preparation method
  • Hollow core-shell Pt@Ni/graphene three-dimensional composite catalyst and preparation method
  • Hollow core-shell Pt@Ni/graphene three-dimensional composite catalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Weigh 2 mg of graphene and disperse it in 2 ml of deionized water, ultrasonically in an ultrasonic cleaner for 12 hours to obtain a 1.0 mg / ml graphene suspension, then add 40 μL (200 nm in diameter) of 2.5 wt% polystyrene (PS) latex nano Spherical water dispersion, ultrasonic cleaning machine ultrasonic 20min, obtain PS nanosphere / graphene homogeneous suspension.

[0031] 2) Pipette 3 μL of the above-mentioned PS nanosphere / graphene homogeneous suspension and drop-coat it on the surface of the glassy carbon electrode, and let it dry naturally to prepare a PS nanosphere / graphene three-dimensional composite modified electrode.

[0032] 3) Connect the saturated calomel electrode, platinum wire electrode and PS nanosphere / graphene modified electrode to the electrochemical workstation, immerse in 1mmol / L nickel nitrate solution, and perform cyclic voltammetry in the range of -0.8 ~ 1.2V Scanning (scanning speed is 50mV / s), scanning 10 circles, so that metal Ni is deposite...

Embodiment 2

[0036] The preparation method is the same as in Example 1, except that polypyrrole PPY nanospheres are used instead of polystyrene (PS) latex nanospheres.

Embodiment 3

[0038] The preparation method is the same as that in Example 1, except that polystyrene (PS) latex nanospheres are replaced by polyvinylpyrrolidone PVP nanospheres.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a hollow core-shell Pt@Ni / graphene three-dimensional composite catalyst and a preparation method. A PtNi nano alloy of a hollow core-shell structure is uniformly loaded on the surface of graphene by virtue of an electrochemical deposition method by taking the graphene as a carrier and a polymer nanosphere as a template. The catalyst is represented by adopting a SEM and an electrochemical method. The composite catalyst is uniformly deposited among graphene sheet layers, so as to effectively prevent accumulation between graphene nanosheets, improve the dispersion degree of the catalyst and increase the active surface area of the catalyst. Test results of cyclic voltammetry and chronoamperometry show that the hollow core-shell Pt@Ni / graphene three-dimensional composite catalyst is relatively good in catalytic activity and CO poisoning resistance on methanol oxidation and also is good in stability.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, in particular to a hollow core-shell PtNi / graphene three-dimensional composite catalyst and a preparation method. Background technique [0002] Direct methanol fuel cell (DMFC) is a green energy device that uses methanol as fuel to convert chemical energy into electrical energy. DMFC has the advantages of low temperature operation, high storage capacity, portability, economy and environmental protection, making it a research hotspot in fuel cells. [0003] In DMFC, Pt is usually used as an anode catalyst. The noble metal Pt is expensive, and the catalytic activity of a single metal platinum cannot meet the commercial requirements of DMFC. In addition, in the process of catalytic oxidation of methanol, it is easy to adsorb the intermediate product CO in the process of methanol oxidation, which causes Pt poisoning. Therefore, a large number of studies have been carried out on binary bimetallic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J23/89H01M4/90
CPCY02E60/50
Inventor 王宗花张菲菲修瑞萍杨敏夏建飞毕赛桂日军李延辉夏延致
Owner QINGDAO UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com