A kind of phosphide nano catalyst and preparation method thereof

A nano-catalyst and phosphide technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of MOF-based electrocatalysts with few reports, achieve excellent multifunctional electrocatalytic performance, solve The effect of low ORR activity and simple process

Active Publication Date: 2021-07-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MOF-based electrocatalysts with multiple functions of HER, OER, and ORR are still rarely reported.

Method used

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  • A kind of phosphide nano catalyst and preparation method thereof
  • A kind of phosphide nano catalyst and preparation method thereof
  • A kind of phosphide nano catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The present embodiment provides the first phosphide nanocatalyst, and its preparation method is as follows:

[0057] 1. Dissolve 3mmol of cobalt acetate and 4.5mmol of sodium citrate in 20ml of deionized water to obtain a solution; then, dissolve 2mmol of potassium cobaltcyanide in 20mL of deionized water, then quickly pour it into a solution and let it stand After 18 hours, filter and dry successively, the obtained Prussian blue analogue Co 3 [Co(CN) 6 ] 2 ;

[0058] 2. Weigh the Co obtained in the above step 1. 3 [Co(CN) 6 ] 2 , placed in a tube furnace, in an air atmosphere, raised from room temperature to 400°C at a heating rate of 3°C / min, and kept at this temperature for 2h to obtain reactant 1;

[0059] 3, reactant 1 and NaH obtained in step 2 2 PO 2 ·H 2 O is placed on both sides of the quartz boat, where NaH 2 PO 2 ·H 2 O On the air inlet side, place the quartz boat in a tube furnace, and raise the temperature from room temperature to 300°C at a rat...

Embodiment 2

[0065] The present embodiment provides the second phosphide nanocatalyst, and its preparation method is as follows:

[0066] 1. Dissolve 3mmol of cobalt acetate and 4.5mmol of sodium citrate in 20ml of deionized water to obtain a solution; dissolve 2mmol of potassium cobaltcyanide in 20mL of deionized water, then quickly pour it into a solution and let it stand for 18 hours , followed by filtration and drying treatment, the obtained Prussian blue analogue Co 3 [Co(CN) 6 ] 2 ;

[0067] 2. Weigh the Co obtained in the above step 1. 3[Co(CN) 6 ] 2 , placed in a tube furnace, in an air atmosphere, raised from room temperature to 400°C at a heating rate of 3°C / min, and kept at this temperature for 2h to obtain reactant 1;

[0068] 3. Treat the reactant 1 obtained in step 2 with NaH 2 PO 2 ·H 2 O is placed on both sides of the quartz boat, where NaH 2 PO 2 ·H 2 O On the air inlet side, place the quartz boat in a tube furnace, and raise the temperature from room temperatu...

Embodiment 3

[0073] The present embodiment provides the third phosphide nanocatalyst, and its preparation method is as follows:

[0074] 1. Dissolve 3mmol of cobalt acetate and 4.5mmol of sodium citrate in 20ml of deionized water to obtain a solution; dissolve 2mmol of potassium cobaltcyanide in 20mL of deionized water, then quickly pour it into a solution and let it stand for 18 hours , followed by filtration and drying treatment, the obtained Prussian blue analogue Co 3 [Co(CN) 6 ] 2 ;

[0075] 2. Weigh the Co obtained in the above step 1. 3 [Co(CN) 6 ] 2 , placed in a tube furnace, in an air atmosphere, raised from room temperature to 400°C at a heating rate of 3°C / min, and kept at this temperature for 2h to obtain reactant 1;

[0076] 3. Treat the reactant 1 obtained in step 2 with NaH 2 PO 2 ·H 2 O is placed on both sides of the quartz boat, where NaH 2 PO 2 ·H 2 O On the air inlet side, place the quartz boat in a tube furnace, and raise the temperature from room temperatu...

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Abstract

The invention belongs to the technical field of nanomaterials, in particular to a phosphide nanocatalyst and a preparation method thereof. The invention provides a preparation method of a phosphide nano-catalyst, comprising the following steps: Step 1, in an air atmosphere, the Prussian blue analogue is heated to obtain a reactant 1, wherein M II and M III They are divalent transition metal cations and trivalent transition metal cations respectively; step 2, in a protective atmosphere, reactant 1 and phosphine are heated to obtain reactant 2; step 3, reactant 2 is subjected to passivation treatment, Obtain reactant 3; step 4, mix reactant 3, solvent and nitrogen-containing compound solution, heat, filter and dry to obtain reactant 4; step 5, in a protective atmosphere, reactant 4 is heat-treated to obtain Phosphide nanocatalysts. The present invention fills the gap in the prior art that lacks MOF-based electrocatalysts with multiple functions of HER, OER and ORR.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a phosphide nanocatalyst and a preparation method thereof. Background technique [0002] Hydrogen fuel cell technology has a revolutionary impact on developments such as electric vehicles. However, the large-scale application of fuel cells requires cheap and efficient electrocatalysts on the one hand; on the other hand, it needs to solve the supply problem of high-quality hydrogen fuel. It is well known that hydrogen gas can be produced by water splitting, however, the high stability of water requires efficient electrocatalysts to drive the hydrogen evolution reaction (HER) at the cathode and the oxygen evolution reaction (OER) at the anode of the electrolyzer. In addition, the rechargeable zinc-air battery has a high theoretical energy density (up to 1086Wh kg Zn -1 ) and simple structure, it will play a significant role in promoting the application and development of f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90C25B11/073C25B1/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25B1/04C25B11/04H01M4/90Y02E60/36Y02E60/50
Inventor 李运勇严亮张冰张海燕
Owner GUANGDONG UNIV OF TECH
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