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Composite catalyst, preparation method and application thereof

A composite catalyst, electrocatalysis technology, applied in the field of catalysis, can solve problems such as the inability to carry out large-scale commercial applications and the high price of Pt/C catalysts

Active Publication Date: 2021-10-08
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a composite catalyst and its preparation method and application, aiming to solve the problem that the existing commercial Pt / C catalyst is expensive and cannot be used in large-scale commercial applications

Method used

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  • Composite catalyst, preparation method and application thereof
  • Composite catalyst, preparation method and application thereof
  • Composite catalyst, preparation method and application thereof

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Embodiment 1

[0058] 2g Mo 2 Ga 2 C powder was ground for 30 min, then slowly added to 20 mL of HF solution, placed on a magnetic stirring heating mantle at 55 °C, and stirred for 7 days. Then, centrifuge at 10000rpm for 10min to obtain Mo 2 CT x , Mo was washed with deionized water 2 CT x Several times until the pH of the solution reaches around 6. Finally, the obtained Mo 2 CT x The powder was dried in a freeze dryer. Mo 2 CT x The SEM picture is as follows figure 1 As shown in (a), it can be seen from the figure that Mo 2 CT x It is a two-dimensional sheet structure. Its XRD pattern is as follows Figure 4 shown.

[0059] 50mg Mo 2 CT x The powder was added to 30 mL of deionized water, sonicated for 2 h, and then 322 mg of ammonium perrhenate (NH 4 ReO 4 ), 50mg 1-butyl-3-methylimidazolium tetrafluoroborate, 410mg thiourea (CH 4 N 2 S), after stirring for 30min, transferred to a 50mL stainless steel autoclave, and maintained at a temperature of 200°C for 6h. After t...

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Abstract

The invention discloses a composite catalyst, a preparation method and application thereof. The composite catalyst comprises an MXene substrate, rhenium disulfide nanosheets loaded on the surface of the MXene substrate and doped with nonmetal atoms, and platinum monoatoms loaded on the rhenium disulfide nanosheets doped with the nonmetal atoms. According to the invention,the loaded platinum single atoms can realize high atom utilization efficiency, greatly reduce the use amount of platinum and save the cost; the rhenium disulfide nanosheet has a large surface area and can contain more platinum atoms, and by conducting non-metal atom doping on the rhenium disulfide nanosheet,the number of active sites of the rhenium disulfide nanosheet can be increased, and the conductivity and the proton capturing capacity of the rhenium disulfide nanosheet are improved; the MXene material is introduced, so that the number of active sites of the rhenium disulfide nanosheet is increased, and the conductivity of the rhenium disulfide nanosheet is improved; and the MXene substrate and the rhenium disulfide nanosheet loaded on the surface of the MXene substrate and doped with nonmetal atoms are integrally used as a platinum monatomic carrier to realize loading of platinum monatomic, so that the composite catalyst has excellent electro-catalytic performance.

Description

technical field [0001] The invention relates to the field of catalysis, in particular to a composite catalyst and its preparation method and application. Background technique [0002] Energy and the environment are the most important issues involved in the sustainable development of human society. 80% of the world's energy demand comes from fossil fuels, which will eventually lead to the depletion of fossil fuels, and their use will also lead to serious environmental pollution. It is an inevitable trend of development to gradually shift from the use of fossil fuels to the use of sustainable and pollution-free non-fossil energy. Hydrogen is one of the ideal clean energy sources, and it is also an important chemical raw material, which is widely valued by countries all over the world. Compared with other hydrogen production methods, electrocatalytic hydrogen evolution is favored because of its simple preparation method, high efficiency and pure product. [0003] As the best ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B1/04B82Y30/00B82Y40/00
CPCC25B11/04C25B1/04B82Y30/00B82Y40/00Y02E60/36
Inventor 张嘉恒易明杰李娜朱振业马佳钰
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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