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Porous cubic bimetallic phosphide catalyst as well as preparation method and application thereof

A cubic, bimetallic technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as slow kinetics, achieve good stability, abundant active sites, and simple operation Effect

Inactive Publication Date: 2019-07-09
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogen evolution reaction has a thermodynamic advantage, however, the oxygen evolution reaction involves a multi-step proton coupling and electron transfer process with slow kinetics

Method used

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  • Porous cubic bimetallic phosphide catalyst as well as preparation method and application thereof
  • Porous cubic bimetallic phosphide catalyst as well as preparation method and application thereof
  • Porous cubic bimetallic phosphide catalyst as well as preparation method and application thereof

Examples

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preparation example Construction

[0041] A preparation method of a porous cubic bimetallic phosphide catalyst, comprising the following steps:

[0042] Step S1: Preparation of Solution A

[0043] Add a deflocculant and a complexing stabilizer to deionized water, and after ultrasonic stirring and dissolving, add a transition metal salt to it, and stir evenly to obtain a solution A, the concentration of the deflocculating agent and the complexing stabilizer in the solution A is 1 -300mmol / L, the concentration of transition metal salt is 0.5-300mmol / L;

[0044] Step S2: Preparation of Solution B

[0045] Add transition metal potassium cyanide into deionized water, and stir to obtain solution B, wherein the concentration of transition metal potassium cyanide is 0.3-300mmol / L;

[0046] Step S3: Preparation of Solution C

[0047] Mix solution A and solution B obtained in step S1 and step S2, and ultrasonically stir for 5-10 minutes at a temperature of 298-313K to obtain solution C;

[0048] Step S4: Preparation ...

Embodiment 1

[0057] A preparation method of a porous cubic bimetallic phosphide catalyst, comprising the following steps:

[0058] Step S1: Preparation of Solution A

[0059] Add 1.5 mmol of sodium citrate to 60 ml of deionized water, and after ultrasonically stirring to dissolve, add 1.5 mmol of cobalt chloride hexahydrate to it, and stir to obtain solution A;

[0060] Step S2: Preparation of Solution B

[0061] Add 1.0 mmol potassium ferricyanide to 60 ml of deionized water, stir well to obtain solution B;

[0062] Step S3: Preparation of Solution C

[0063] Mix solution A and solution B obtained in step S1 and step S2, and ultrasonically stir for 10 min at a temperature of 298K to obtain solution C;

[0064] Step S4: Preparation of Prussian blue analogs

[0065] The solution C obtained in step S3 was left to age for 24 hours, centrifuged to obtain a precipitated product, washed 3 times with absolute ethanol, and dried in an oven at a temperature of 333K to obtain an iron-cobalt Prus...

Embodiment 2

[0069] A preparation method of a porous cubic bimetallic phosphide catalyst, comprising the following steps:

[0070] Step S1: Preparation of Solution A

[0071] Add 1.5 mmol of sodium tartrate to 60 ml of deionized water, and after ultrasonically stirring to dissolve, add 1.5 mmol of nickel carboxylate to it, and stir to obtain solution A;

[0072] Step S2: Preparation of Solution B

[0073] Add 1.0mmol potassium cobaltcyanide to 60ml deionized water, stir well to obtain solution B;

[0074] Step S3: Preparation of Solution C

[0075] Mix solution A and solution B obtained in step S1 and step S2, and ultrasonically stir for 8 minutes at a temperature of 303K to obtain solution C;

[0076] Step S4: Preparation of Prussian blue analogs

[0077] The solution C obtained in step S3 was left to age for 36 hours, centrifuged to obtain a precipitated product, washed 4 times with absolute ethanol, and dried in an oven at a temperature of 333K to obtain an iron-cobalt Prussian blue...

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Abstract

The invention relates to a porous cubic bimetallic phosphide catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly preparing abimetallic Prussian blue precursor, and performing heating calcination on the bimetallic Prussian blue precursor and phosphorus in a tube furnace to dope the phosphorus into the bimetallic Prussian blue analogue. The synthetic method provided by the invention has the advantages of simple operation, low costs and easy mass production in an industrial scale; the catalyst synthesized by the method has a smaller and uniform size, so that the catalyst has a larger specific surface area and rich active sites, and the electro-catalytic property of the catalyst is enhanced; and in addition, the catalyst synthesized by the method has good stability, can be recycled and applied to the fields of energy and environmental protection, and has potential value.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic total water splitting electrode materials, and in particular relates to a porous cubic bimetallic phosphide catalyst and its preparation method and application. Background technique [0002] At present, hydrogen energy is the key magic weapon to overcome energy and environmental problems in the 21st century, and electrocatalytic water splitting is a green and sustainable technology for producing high-purity hydrogen. The electrocatalytic total water splitting reaction includes two half-reactions: hydrogen evolution reaction and oxygen evolution reaction. The hydrogen evolution reaction possesses thermodynamic advantages, however, the oxygen evolution reaction involves a multi-step proton coupling and electron transfer process with slow kinetics. Slow kinetics and harsh thermodynamic conditions make the oxygen evolution reaction a bottleneck in the development of electrocatalytic water sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J27/187B01J35/00B01J35/02B01J35/10C25B1/04C25B11/06
CPCB01J27/1853B01J27/187C25B1/04C25B11/091B01J35/33B01J35/40B01J35/50B01J35/60Y02E60/36
Inventor 杜袁鑫翟庆喜李琳
Owner ANHUI UNIVERSITY
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