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Preparation method of graphene-loaded nano nickel phosphate hydrogenation catalyst

A hydrogenation catalyst, nickel phosphide technology, applied in physical/chemical process catalysts, chemical instruments and methods, hydrogenation to hydrocarbons, etc., can solve the complex preparation conditions of transition metal phosphide, the catalytic activity cannot be fully exerted, and the particle agglomeration is serious. and other problems, to achieve good catalytic activity and reusability, excellent stability and corrosion resistance, and the effect of eliminating internal diffusion

Active Publication Date: 2015-03-25
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a synthesis method that is simple and Method for hydrogenation catalyst of graphene highly dispersed nickel phosphide nanoparticles under mild conditions and low cost

Method used

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  • Preparation method of graphene-loaded nano nickel phosphate hydrogenation catalyst

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Effect test

Embodiment 1

[0022] Weigh a certain amount of graphite oxide and add it to deionized water, so that the concentration of graphite oxide is 2mg / mL, ultrasonic treatment 3 times, each time for 0.5h, to obtain a stably dispersed aqueous solution of graphene oxide; add 1mmol hypophosphorous acid to the above solution Sodium dihydrogen and 0.5mmol nickel chloride, stirred at room temperature for 1h, put the mixed solution into a polytetrafluoroethylene crystallization kettle, crystallized at 150°C for 20h, centrifuged after crystallization, and washed the sample fully with deionized water, 80 ℃ drying to obtain the catalyst A.

Embodiment 2

[0024] Using graphene as a carrier, a highly dispersed nickel phosphide / graphene catalyst was prepared by a hydrothermal method. Weigh a certain amount of graphite oxide and add it to deionized water, so that the concentration of graphite oxide is 2mg / mL, ultrasonic treatment 3 times, each time for 0.5h, to obtain a stable dispersed graphene oxide aqueous solution; add 6mmol hypophosphorous acid to the above solution Sodium dihydrogen and 2mmol nickel chloride, stirred at room temperature for 1h, put the mixed solution into a polytetrafluoroethylene crystallization kettle, crystallized at 170°C for 15h, centrifuged after crystallization, washed the sample fully with deionized water, 80°C drying to obtain the catalyst B.

Embodiment 3

[0026] Using graphene as a carrier, a highly dispersed nickel phosphide / graphene catalyst was prepared by a hydrothermal method. Weigh a certain amount of graphite oxide and add it to deionized water, so that the concentration of graphite oxide is 2mg / mL, ultrasonic treatment 3 times, each time for 0.5h, to obtain a stable dispersed graphene oxide aqueous solution; add 6mmol hypophosphorous acid to the above solution Sodium dihydrogen and 2mmol nickel chloride, stirred at room temperature for 1h, put the mixed solution into a polytetrafluoroethylene crystallization kettle, crystallized at 190°C for 5h, centrifuged after crystallization, washed the sample fully with deionized water, 80°C drying to obtain the catalyst C.

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Abstract

The invention relates to a preparation method of a graphene-loaded nano nickel phosphate hydrogenation catalyst. According to the method, graphene oxide capable of being stably dispersed in water is used as a carrier precursor and loaded nano nickel phosphate is prepared by a static hydrothermal synthesis method. The graphene oxide can be uniformly and stably dispersed into a water solution due to a unique two-dimensional structure and abundant oxyl radicals of the graphene oxide; and furthermore, the graphene oxide has a strong adsorption capability on metal cations, and a nickel source can be highly dispersed. The catalyst provided by the invention is used for hydrogenation of olefin and has relatively high catalytic activity and good reusability. According to the catalyst, preparation conditions are moderate, the process is simple and the cost is low; and industrial production is easy to realize.

Description

technical field [0001] The invention relates to the technical field of non-noble metal hydrogenation catalysts and their preparation, in particular to a method for preparing graphene-supported nano-nickel phosphide hydrogenation catalysts. Background technique [0002] Transition metal phosphides are a large class of compounds formed by phosphorus atoms entering the metal lattice. These compounds have good thermal stability, high hardness, strong oxidation and corrosion resistance, and exhibit a high surface active site density. Studies have found that transition metal phosphides have excellent hydrotreating activity, consume less hydrogen, and can replace noble metal Pt to a certain extent, which has attracted great attention in the field of new catalytic materials. Among the currently studied transition metal phosphides, nickel phosphide exhibits superior hydrogenation activity and is expected to become a new generation of refining hydroprocessing catalysts. [0003] Many...

Claims

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Application Information

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IPC IPC(8): B01J27/185C07C5/03C07C13/18
Inventor 刘平常婉亭李永昕薛冰
Owner CHANGZHOU UNIV
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