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Pt/VS2 catalytic material and preparation method and application thereof

A catalytic material and nanomaterial technology, applied in the field of nanomaterial preparation and hydrogen production catalyst, can solve the problems of cumbersome process, unfavorable large-scale promotion and application of electrolysis water hydrogen evolution technology, high temperature and so on.

Active Publication Date: 2019-07-30
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods or processes are cumbersome, or require high temperature, or harsh conditions, which are not conducive to the large-scale application of electrolytic water hydrogen evolution technology.
[0006] In addition, most of the substrate materials currently used to support single atoms are carbon-based materials (such as graphene, carbon nanotubes, porous carbon, etc.) high conductivity

Method used

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  • Pt/VS2 catalytic material and preparation method and application thereof
  • Pt/VS2 catalytic material and preparation method and application thereof
  • Pt/VS2 catalytic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Example 1: VS 2 Preparation of nanosheets

[0071] 3mmol Na 3 VO 4 12H 2 O and 15mmol of thioacetamide were added to 40mL of deionized water, fully stirred until completely dissolved, and then transferred to a 50mL polytetrafluoroethylene reactor. Subsequently, a piece of carbon paper with a size of 1 cm×2 cm was immersed in the above solution, and then the reaction vessel was sealed and reacted at 160° C. for 24 h. After the reaction, the temperature was naturally lowered to room temperature, and then the carbon paper was taken out, washed with water and ethanol several times, and dried to obtain the VS grown on the carbon paper. 2 Nanosheets. Vacuum annealing at 300°C for 20 min to improve VS 2 Crystallinity of nanosheets.

Embodiment 2

[0072] Example 2: Pt / VS 2 Preparation of catalytic materials

[0073] will grow vs 2 The carbon paper of the nanosheets was respectively immersed in 10mL, 0.1mmol / L, 0.5mmol / L, 1mmol / L chloroplatinic acid solution, and placed in a 100mW cm -2 Irradiated under xenon light source for 0.5h. When the irradiation time is more than half, turn over the surface of the carbon paper to complete the reaction on the other side. After the reaction, the carbon paper was taken out, washed with water and ethanol several times, and dried to obtain the Pt single atom-VS 2 Nanosheet composite catalytic materials.

[0074] figure 1 for VS 2 Nanosheet (embodiment 1) and its X-ray diffraction pattern after trapping Pt atom (embodiment 2), proves that the introduction of Pt atom is to VS 2 The crystal structure of Pt has no effect, and the Pt atoms do not form particles, so there is no Pt diffraction peak.

[0075] figure 2 For Pt / VS grown on carbon paper 2 The scanning electron micrograp...

Embodiment 3

[0077] Example 3: Pt / VS 2 Preparation of catalytic materials

[0078] will grow vs 2 The carbon paper of the nanosheets is immersed in 10mL, 0.1mmol / L, 0.5mmol / L, 1mmol / L chloroplatinic acid solution, placed in a 100mW cm -2 irradiated under a xenon light source for 1 h. When the irradiation time is more than half, turn over the surface of the carbon paper to complete the reaction on the other side. After the reaction, the carbon paper was taken out, washed with water and ethanol several times, and dried to obtain the Pt single atom / atom cluster-VS 2 Nanosheet composite catalytic materials.

[0079] image 3 For the Pt single atom-VS prepared by 0.1mmol / L chloroplatinic acid solution in embodiment 2 2 Condenser spherical aberration electron microscope dark field image of nanosheet catalytic material, Figure 5 For the Pt single atom-VS prepared by 0.5mmol / L chloroplatinic acid solution in embodiment 2 2 Condenser spherical aberration electron microscope dark field imag...

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Abstract

The invention provides a Pt / VS2 catalytic material and a preparation method and application thereof. The Pt / VS2 catalytic material comprises a VS2 nano material and Pt atoms dispersed in the VS2 nanomaterial. According to the preparation method, a VS2 catalyst and a Pt atom catalyst dispersed in the VS2 catalyst are combined with each other, so that the Pt / VS2 catalytic material has high conductivity and high activity site density, the electrocatalytic hydrogen evolution performance of the material is optimized, the utilization rate of noble metal is increased at the same time, and the material cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and hydrogen production catalyst, and specifically relates to a Pt / VS 2 Catalytic materials, preparation methods and applications, especially applications in hydrogen production by electrolysis of water. Background technique [0002] Since the new century, the world is facing increasingly severe energy and environmental crises, and the development of new, efficient, ultra-clean and renewable energy has attracted more and more attention. Since the 1970s, molecular hydrogen has been regarded as an efficient and clean new energy carrier. It can not only provide a high heat of combustion as a fuel without causing environmental pollution, but also convert chemical energy into electrical energy to provide power for fuel cells. The most important thing is that it can be produced from the most abundant water resources on earth. Therefore, hydrogen energy is also regarded as the most ide...

Claims

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Application Information

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IPC IPC(8): B01J27/045C25B11/06C25B1/04
CPCB01J27/045C25B11/04C25B1/04B01J35/33Y02E60/36
Inventor 朱婧婷张文静王卓柯宇轩
Owner SHENZHEN UNIV
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