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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 are negatively charged in aqueous solution and repel each other. According to the traditional method, Difficult to load molybdenum / tungsten disulfide onto graphene

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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preparation example Construction

[0033] Further, a hyperdisperse MoS 2 The preparation method of rGO nano-hybrid electrolysis water hydrogen production catalyst comprises the following steps:

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

[0035] 2) UDSL-MoS 2 / Synthesis of rGO: prepared by hydrothermal synthesis with molybdate, cysteine ​​and graphene oxide.

Embodiment

[0038] Synthesis of graphene oxide: by modified Hummers method (Marcano D C et al. , 2010) synthesized graphene oxide with natural graphite powder, the detailed process is as follows: first, 2.00 g of natural flake graphite powder was ground with 40 g of NaCl for 15 minutes, washed thoroughly with distilled water, and dried in a blast oven at 70 °C for 30 minutes. Place the treated graphite powder in 46 mL of concentrated H 2 SO 4 (98%), mechanically stirred for 24 hours. In a water bath at 40°C, add 1 g NaNO 3 , continue to stir for 5min; under ice-water bath, slowly add 6g KMnO 4 , stirring constantly, during this process the temperature of the mixture was kept not to exceed 20°C. Then, under a water bath at 40°C, stirring was continued for 30 min. 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 stirred for 15 min. After the reaction is over, add 280mL distilled wat...

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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
CPCC25B1/04B01J27/051B01J35/396Y02E60/36
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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