Carbon-based metal phosphide loaded catalyst, preparation method and application thereof

A technology of supporting metals and phosphides, applied in the field of electrocatalysis, can solve the problems of poor stability of pure Pt, reduced reactivity, and limited wide application, and achieve the effects of easy regulation, weakening adsorption, and broad application prospects.

Active Publication Date: 2019-09-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rare reserves and high price of the precious metal Pt limit its wide application.
Not only that, the stability of pure Pt is poor, and the reactivity is greatly reduced after more than ten hours of reaction.

Method used

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  • Carbon-based metal phosphide loaded catalyst, preparation method and application thereof
  • Carbon-based metal phosphide loaded catalyst, preparation method and application thereof
  • Carbon-based metal phosphide loaded catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: RhP 2 Synthesis of @NC

[0041] 1) Add 50 mg of rhodium nitrate and 50 mL of deionized water into a 250 mL beaker, stir to dissolve, add 5 mL of phosphoric acid dropwise while stirring continuously, and stir for 40 minutes to form a uniform aqueous solution;

[0042] 2) Add 1 g of cyanamide to the aqueous solution obtained in step 1), and stir for 75 minutes, so that the cyanamide can be more evenly dispersed in the aqueous solution to obtain a precursor solution;

[0043] 3) Put the precursor solution obtained in step 2) into a polytetrafluoroethylene tank, conduct a hydrothermal reaction at 150°C for 20 hours, cool to room temperature after the reaction, filter the reaction solution, and vacuum-dry the obtained solid at 80°C 20 hours, obtain the rhodium phosphide precursor;

[0044] 4) Grind the rhodium phosphide precursor obtained in step 3) into a powder, weigh 1g of the rhodium phosphide precursor powder and transfer it to a tube furnace, pass nitrogen...

Embodiment 2

[0050] Example 2: IrP 2 Synthesis of @NC

[0051] 1) Add 100 mg of iridium tetrachloride and 50 mL of deionized water into a 250 mL beaker, stir to dissolve, add 10 mL of 50% phytic acid dropwise while stirring continuously, and stir for 30 minutes to form a uniform aqueous solution;

[0052] 2) Add 2 g of melamine to the aqueous solution obtained in step 1), and stir for 60 minutes, so that the melamine can be more evenly dispersed in the aqueous solution to obtain a precursor solution;

[0053] 3) Put the precursor solution obtained in step 2) into a polytetrafluoroethylene tank, conduct a hydrothermal reaction at 120°C for 24 hours, cool to room temperature after the reaction, filter the reaction solution, and vacuum-dry the obtained solid at 60°C After 25 hours, the iridium phosphide precursor was obtained;

[0054] 4) Grind the iridium phosphide precursor obtained in step 3) into a powder, weigh 1g of the iridium phosphide precursor powder and transfer it to a tube furn...

Embodiment 3

[0059] Example 3: Pd 5 P 2 Synthesis of @NC

[0060] 1) Add 75 mg of palladium chloride and 70 mL of deionized water into a 250 mL beaker, stir to dissolve, add 5 g of sodium dihydrogen phosphate dropwise while stirring continuously, and stir for 45 minutes to form a uniform aqueous solution;

[0061] 2) Add 3 g of urea to the aqueous solution obtained in step 1), and stir for 100 minutes, so that the urea can be more evenly dispersed in the aqueous solution to obtain a precursor solution;

[0062] 3) Put the precursor solution obtained in step 2) into a polytetrafluoroethylene tank, conduct a hydrothermal reaction at 180°C for 10 hours, cool to room temperature after the reaction, filter the reaction solution, and vacuum-dry the obtained solid at 100°C 20 hours, obtain palladium phosphide precursor;

[0063] 4) Grind the palladium phosphide precursor obtained in step 3) into a powder, weigh 1g of the palladium phosphide precursor powder and transfer it to a tube furnace, p...

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PUM

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Abstract

The invention discloses a carbon-based metal phosphide loaded catalyst, a preparation method and application thereof. The preparation process of the carbon-based metal phosphide loaded catalyst includes: mixing a precious metal salt, deionized water and a phosphorus source evenly, then adding a nitrogen-containing organic matter and stirring the substances evenly, transferring the obtained solution into a polytetrafluoroethylene tank, carrying out hydrothermal reaction at 120-180DEG C for 10-24h, at the end of the reaction, conducting cooling to room temperature, filtering the reaction liquid,drying the filter residue, then placing the filter residue in a tubular furnace, in nitrogen atmosphere, raising the temperature from room temperature to 700-900DEG C at a rate of 3-8DEG C / min, thenkeeping a constant temperature for 1-4h, then performing natural cooling to room temperature, cleaning the calcinations product with deionized water and anhydrous ethanol respectively 3-5 times, performing pumping filtering, and drying the filter residue, thus obtaining the carbon-based metal phosphide loaded catalyst. The carbon-based metal phosphide loaded catalyst prepared according to the invention is low in cost, and has high catalytic activity and stability in the electrocatalytic hydrogenation reaction of lignin phenol compounds.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a carbon-based supported metal phosphide catalyst and a preparation method and application thereof. Background technique [0002] With the continuous consumption of fossil energy, the global energy crisis is gradually intensified. In order to solve the increasingly serious energy shortage problem, people began to look for new energy sources that can replace fossil energy sources. As the only renewable carbon energy source, lignocellulosic biomass has received more and more attention. [0003] The composition of lignocellulosic biomass includes carbohydrates (cellulose and hemicellulose), lignin, and some other components such as proteins, inorganic substances, etc. According to the concept of biorefining, the final processing goals of lignocellulosic biomass are the following two: (1) to be able to fractionate three main products, and to produce bio-based p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C25B3/04C25B11/12C25B11/06C25B3/25
CPCB01J27/1856B01J35/0033C25B3/25C25B11/051C25B11/075
Inventor 钟兴蒋文斌王建国
Owner ZHEJIANG UNIV OF TECH
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