A kind of cu-mo-s composite material and its preparation method and application

A composite material, cu-mo-s technology, applied in the field of electrochemistry, can solve the problems of weak metal and hydrogen bonding and inability to stabilize the intermediate state

Active Publication Date: 2022-03-15
ANHUI NORMAL UNIV
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  • Application Information

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Problems solved by technology

The metal to the right of Pt binds hydrogen too weakly to stabilize the intermediate state and prevent the reaction from occurring

Method used

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  • A kind of cu-mo-s composite material and its preparation method and application
  • A kind of cu-mo-s composite material and its preparation method and application
  • A kind of cu-mo-s composite material and its preparation method and application

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preparation example Construction

[0026] The present invention provides a kind of preparation method of Cu-Mo-S composite material, comprises the following steps: (1) in the mixed solution of alcohol and water, add divalent copper salt, molybdate and sulfur source and mix until dissolving; (2 ) and then add a reducing agent, transfer to a high-temperature reactor for heating reaction; (3) centrifuge the system after the heating reaction to remove liquid, and dry the obtained product.

[0027] In the above technical solution, the Cu-Mo-S composite material has better catalytic stability and catalytic activity in the hydrogenation reaction, and at the same time, the preparation method is simple and fast, and the cost is lower, so it has wider application prospects. The reason, we speculate: the transition metal Cu has unpaired 3d electrons in the outer shell of the atom, it is easy to pair with the 1s orbital of the hydrogen atom during the electrocatalytic hydrogen evolution reaction to form a Cu-H adsorption bo...

Embodiment 1

[0048] Weigh 241.6mg copper nitrate trihydrate (1mmol), 241.95mg sodium molybdate dihydrate (1mmol), 75.13mg thioacetamide (1mmol), dissolve in 40mL twice distilled water and 30mL absolute ethanol respectively at room temperature In the solution, stir at room temperature for 30 minutes until dissolved, add 5 mL of hydrazine hydrate to the mixture, transfer it to a high-pressure reactor, set the reaction temperature to 120° C., and the reaction time to 4 hours. After the temperature of the reaction kettle was lowered to room temperature, it was centrifuged and washed, and vacuum-dried at 60°C for 18 hours to obtain a Cu-Mo-S composite material, which was designated as A1.

Embodiment 2

[0050] Weigh 241.6 mg of copper nitrate trihydrate (1 mmol), 140 mg of sodium molybdate dihydrate (about 0.6 mmol), and 30 mg of thioacetamide (0.4 mmol), and dissolve them in 40 mL of twice distilled water and 40 mL of absolute ethanol at room temperature. In the mixed solution, stir at room temperature for 30 min until dissolved, add 5 mL of hydrazine hydrate to the mixed solution, transfer to an autoclave, set the reaction temperature to 100° C., and the reaction time to 6 h. After the temperature of the reaction kettle was lowered to room temperature, it was centrifuged and washed, and vacuum-dried at 60°C for 18 hours to obtain a Cu-Mo-S composite material, which was designated as A2.

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Abstract

The invention discloses a Cu-Mo-S composite material and its preparation method and application. The preparation method comprises the following steps: (1) adding divalent copper salt, molybdate and sulfur source into the mixed solution of alcohol and water Mixing until dissolved; (2) adding a reducing agent, transferring to a high-temperature reactor for heating reaction; (3) centrifuging the system after the heating reaction to remove liquid, and drying the obtained product. The Cu‑Mo‑S composite material has a hollow structure, which provides proton transport channels and accelerates the proton transport rate; by introducing molybdenum source and sulfur source in situ to increase the active sites and improve the conductivity of the material, the one-step synthesis of Cu The ‑Mo‑S composite material has good electrocatalytic hydrogen evolution activity and stability, can increase the cathodic hydrogen evolution rate in the electrolysis water device, and can be used as a hydrogen evolution reaction catalyst; at the same time, the preparation method has the advantages of simple synthesis and low cost.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a Cu-Mo-S composite material and its preparation method and application. Background technique [0002] With the development of society, the energy crisis has become the focus of global attention, and it is estimated that oil resources will be exhausted in 50 years. Therefore, the current top priority is to develop a new type of energy, but because the transportation and storage of wind energy, solar energy and nuclear energy are very difficult, it is necessary to find a renewable, environmentally friendly new type of energy, among which hydrogen energy is due to its high efficiency, no pollution and It is considered to be the most ideal and potential energy carrier in the future due to its simple preparation and other characteristics. However, due to various reasons, hydrogen energy is not currently available for large-scale commercial application. For example, a large amount of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051C25B11/091C25B1/04
CPCB01J27/051B01J35/0033C25B11/04C25B1/04Y02E60/36
Inventor 王银玲范明丽李雪卫丹丹
Owner ANHUI NORMAL UNIV
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