Preparation method of ultra-dispersed MoS2/rGO nano hybridization water-electrolysis hydrogen production catalyst

A technology of ultra-dispersion and electrolysis of water, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, electrolysis process, etc., can solve the difficult problems of molybdenum disulfide/tungsten loading, achieve simple and fast synthesis process, and solve poor conductivity Effect

Inactive Publication Date: 2017-03-15
SOUTH CHINA AGRI UNIV
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Problems solved by technology

For molybdenum disulfide/tungsten disulfide-graphene hybrid materials, since their precursors are generally molybdenum/tungstate and graphene oxide, both of them a

Method used

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  • Preparation method of ultra-dispersed MoS2/rGO nano hybridization water-electrolysis hydrogen production catalyst
  • Preparation method of ultra-dispersed MoS2/rGO nano hybridization water-electrolysis hydrogen production catalyst
  • Preparation method of ultra-dispersed MoS2/rGO nano hybridization water-electrolysis hydrogen production catalyst

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[0033] Furthermore, an ultra-dispersed MoS 2 The preparation method of / rGO nano-hybrid water electrolysis catalyst for hydrogen production includes the following steps:

[0034] 1) Synthesis of graphene oxide: Graphene oxide is synthesized from graphite powder by Hummers method;

[0035] 2) UDSL-MoS 2 / rGO synthesis: It is prepared by hydrothermal synthesis using molybdate, cysteine ​​and graphene oxide.

Example Embodiment

[0037] Example

[0038] The synthesis of graphene oxide: through an improved Hummers method (Marcano D C et al. , 2010) Using natural graphite powder to synthesize graphene oxide, the detailed process is as follows: first take 2.00g natural flake graphite powder and grind it with 40g NaCl for 15 minutes, rinse thoroughly with distilled water, and dry it in a blast drying oven at 70°C for 30 minutes. Put the processed graphite powder in 46mL concentrated H 2 SO 4 (98%), mechanical stirring for 24 hours. Add 1g NaNO in a water bath at 40℃ 3 , Continue to stir for 5min; under ice water bath, slowly add 6g KMnO 4 , Keep stirring, this process keeps the temperature of the mixture not exceeding 20°C. Then, under a water bath at 40°C, continue stirring for 30 minutes. Then 80 mL of distilled water was slowly added to the above mixture. At this time, the temperature of the reaction solution rose rapidly to 98° C., and the mixture was stirred for 15 minutes. After the reaction is over,...

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Abstract

The invention discloses a preparation method of an ultra-dispersed MoS2/rGO nano hybridization water-electrolysis hydrogen production catalyst. According to the preparation method, the catalyst is prepared from molybdate, cysteine and graphene oxide through a hydrothermal synthesis method. A hybridization material of ultra-dispersed molybdenum disulfide and graphene is obtained through a one-step hydrothermal method; a whole synthesis process is simple and rapid, and extra high-temperature heating and vulcanization processes are not needed; sodium molybdate which has low price and is easy to obtain is used as a molybdenum source, and the cysteine is used as a sulfur source. The cysteine is used as a joint molecule, and a molybdate precursor is fixed on the surface of the graphene oxide; the hydrothermal synthesis method is adopted, so that an MoS2 nano-sheet with a controllable size can be loaded on the surface of the graphene in an ultra-dispersion manner, and UDSL-MoS2/rGO is prepared; meanwhile, two problems that a catalytic active site of the molybdenum disulfide is scarce and the conducting property is poor are solved.

Description

technical field [0001] The present invention relates to a hyperdisperse MoS 2 Preparation method of rGO nano-hybrid electrolysis water hydrogen production catalyst. Background technique [0002] The noble metal platinum is highly active for the hydrogen evolution reaction both thermodynamically and kinetically, and it can generate hydrogen at a high rate at a low overpotential. Similarly, expensive and scarce Pt also restricts the promotion of electrolyzed water devices. Therefore, the current research focus on electrolysis of hydrogen is focused on finding substitutes for Pt. Among the numerous non-platinum hydrogen evolution reaction electrocatalysts, layered transition metal dichalcogenides (TMDs), such as MoS 2 、MoSe 2 、WS 2 , because of its ability to work stably under acidic conditions, it has attracted widespread attention from scientists. Among them, Danish scientists (2005) proved that MoS 2 It has a structure similar to Mo-S clusters in nitrogenase and uniqu...

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Application Information

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IPC IPC(8): B01J27/051C25B1/04
CPCB01J27/051B01J35/0073C25B1/04Y02E60/36
Inventor 刘英菊黄伟豪黄俊颖林嘉栋黄浩量
Owner SOUTH CHINA AGRI UNIV
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