A kind of composite catalyst and its preparation method and application

A composite catalyst and electrocatalysis technology, applied in the field of catalysis, can solve the problems that Pt/C catalysts are expensive and cannot be used in large-scale commercial applications.

Active Publication Date: 2022-06-21
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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  • A kind of composite catalyst and its preparation method and application
  • A kind of composite catalyst and its preparation method and application
  • A kind of composite catalyst and its preparation method and application

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Embodiment 1

[0058] 2g Mo 2 Ga 2 The C powder was ground for 30 min, then slowly added to 20 mL of HF solution and placed on a magnetic stirring heating mantle at 55°C for 7 days. Then, the Mo was obtained by centrifugation at 10,000 rpm for 10 min. 2 CT x , wash Mo with deionized water 2 CT x Several times until the pH of the solution reaches around 6. Finally, the resulting Mo 2 CT x The powder is dried in a freeze dryer. Mo 2 CT x SEM image of figure 1 As shown in (a), it can be seen from the figure that Mo 2 CT x It is a two-dimensional sheet-like structure. Its XRD pattern is as 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 ), 50 mg of 1-butyl-3-methylimidazolium tetrafluoroborate, 410 mg of thiourea (CH 4 N 2 S), stirred for 30min, transferred to a 50mL stainless steel autoclave, and kept at 200°C for 6h. After the reaction is completed and cooled, ...

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Abstract

The invention discloses a composite catalyst and its preparation method and application, wherein the composite catalyst includes an MXene substrate, rhenium disulfide nanosheets doped with non-metal atoms supported on the surface of the MXene substrate, and rhenium disulfide nanosheets loaded on the doped Platinum single atoms on rhenium disulfide nanosheets doped with nonmetal atoms. Supporting platinum single atoms can achieve high atom utilization efficiency, greatly reduce the amount of platinum, and save costs. Rhenium disulfide nanosheets have a larger surface area and can accommodate more platinum atoms. Doping rhenium disulfide nanosheets with non-metal atoms can increase the number of active sites, improve their conductivity and capture protons. The introduction of MXene materials improves the number and electrical conductivity of the active sites of rhenium disulfide nanosheets. The MXene substrate and the rhenium disulfide nanosheets doped with non-metal atoms supported on the surface of the MXene substrate are used as the carrier of platinum single atoms to realize the loading of platinum single atoms, so that the composite catalyst has excellent electrocatalytic performance.

Description

technical field [0001] The invention relates to the field of catalysis, in particular to a composite catalyst and a preparation method and application thereof. Background technique [0002] Energy and the environment are the most important issues involved in the sustainable development of human society. 80% of the global 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 non-polluting non-fossil energy sources. Hydrogen is one of the ideal clean energy sources and 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 Patents(China)
IPC IPC(8): C25B11/091C25B11/054C25B11/067C25B11/069C25B1/04B82Y30/00B82Y40/00
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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