Platinum-palladium-nickel chamfered-octahedron porous nano-cage electrocatalyst and preparation method therefor

An electrocatalyst, octahedral technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of mesoporous metal irregularity, metal nanocrystals are rarely reported, etc. Simple method, excellent activity and stability, high product effect

Inactive Publication Date: 2019-12-20
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although great progress has been made in the preparation of mesoporous metals, most mesoporous metals are limited to irregular particles and thin films, and metal nanocrystals combining mesoporous and hollow structures have rarely been reported.

Method used

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  • Platinum-palladium-nickel chamfered-octahedron porous nano-cage electrocatalyst and preparation method therefor
  • Platinum-palladium-nickel chamfered-octahedron porous nano-cage electrocatalyst and preparation method therefor
  • Platinum-palladium-nickel chamfered-octahedron porous nano-cage electrocatalyst and preparation method therefor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of preparation method of platinum palladium nickel truncated octahedron porous nano cage electrocatalyst, described method comprises the steps:

[0035] 1) 50 mg of F127 and 1.5 mL of 20 mM potassium chloroplatinate, 1.5 mL of 20 mM sodium chloropalladate, 1.5 mL of 20 mM nickel chloride, and 0.2 mL of 6 M hydrochloric acid were placed under ultrasonic conditions. Mix evenly under high temperature, then add 2mL of ascorbic acid solution with a concentration of 0.1M, and let the mixed solution stand in an oil bath at 95°C for 4 hours. The final product is washed three times by centrifugation with water and ethanol, and dried at room temperature for later use;

[0036] 2) Redisperse the dried product in the previous step into an excess of concentrated nitric acid solution, stir at room temperature for three days, wash, centrifuge, and dry after the reaction to obtain a platinum-palladium-nickel truncated octahedral porous nanocage electrocatalyst.

[0037] The SEM ...

Embodiment 2

[0040] A kind of preparation method of platinum-palladium-nickel octahedral porous nano-cage oxygen reduction catalyst, described method comprises the steps:

[0041] 1) 50mg of F127 and 0.6mL of 20mM potassium chloroplatinate, 0.6mL of 20mM sodium chloropalladate, 3.3mL of 20mM nickel chloride, 0.2mL of 6M hydrochloric acid under ultrasonic conditions Mix evenly under high temperature, then add 2mL of ascorbic acid solution with a concentration of 0.1M, and let the mixed solution stand in an oil bath at 95°C for 4 hours. The final product is washed three times by centrifugation with water and ethanol, and dried at room temperature for later use;

[0042] 2) redisperse the dried product in the previous step into an excess of concentrated nitric acid solution, stir at room temperature for three days, wash, centrifuge, and dry after the reaction to obtain a porous platinum-palladium-nickel octahedral nanocage electrocatalyst.

[0043] Obtain the SEM image of the platinum-palladi...

Embodiment 3

[0046] A kind of preparation method of platinum palladium nickel truncated octahedron porous nano cage, described method comprises the following steps:

[0047] 1) 50 mg of PVP and 1.5 mL of 20 mM potassium chloroplatinate, 1.5 mL of 20 mM sodium chloropalladate, 1.5 mL of 20 mM nickel chloride, and 0.2 mL of 6 M hydrochloric acid were placed under ultrasonic conditions. Mix evenly under the pressure, then add 2mL of ascorbic acid solution with a concentration of 0.1M, leave the mixed solution in an oil bath at 95°C for 2 hours, and wash the final product by centrifugation three times with water and ethanol.

[0048] 2) redisperse the dried product in the previous step into excess concentrated nitric acid solution, stir at room temperature for three days, wash, centrifuge and dry after the reaction to obtain a platinum-palladium-nickel truncated octahedral porous nanocage electrocatalyst.

[0049] Because in this synthesis process, the reaction time is not enough, can not obta...

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Abstract

The invention relates to a platinum-palladium-nickel chamfered-octahedron porous nano-cage electrocatalyst. The platinum-palladium-nickel chamfered-octahedron porous nano-cage electrocatalyst is prepared through the following methods: uniformly mixing 1mg-100mg of F127 with 0.5mL-4.0mL of 20mM potassium chloroplatinate, 0.5mL-4.0mL of 20mM sodium chloroplatinate, 0.5mL-4.0mL of 20mM nickel chloride and 0.1mL-0.4mL of 6M hydrochloric acid under ultrasonic conditions; adding 2mL of 0.1M ascorbic acid solution, subjecting the mixed solution to standing for 0.5 to 8 hours in oil bath with a temperature of 95 DEG C, subjecting a final product to cyclic centrifuge washing with water and ethanol for three times, and carrying out drying for later use under room-temperature conditions; and dispersing the dried product in excessive concentrated nitric acid solution again, carrying out stirring for three days under room-temperature conditions, and carrying out washing, centrifuging and drying after a reaction ends up, thereby obtaining the platinum-palladium-nickel chamfered-octahedron porous nano-cage electrocatalyst. The material prepared by the method has excellent electrochemical oxygen reduction property.

Description

technical field [0001] The invention relates to a platinum-palladium-nickel truncated octahedral porous nano-cage electrocatalyst and a preparation method thereof. The catalyst can be used for the research of electrochemically catalyzed oxygen reduction reaction. Background technique [0002] Metallic nanocrystals with controllable structures and compositions have attracted extensive attention. It is well known that the intrinsic properties of metal nanocrystals depend greatly on their size, shape and composition. At present, platinum-based nanomaterials have been widely used in various electrochemical energy fields such as fuel cells and water splitting. Therefore, the controllable synthesis of platinum-based nanocrystals is very important for their catalytic applications, especially the platinum-based hollow nanostructures with low density are very promising catalysts. However, such structures are usually prepared by displacement reactions, templating methods or exploitin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/34B01J35/10B82Y30/00B82Y40/00H01M4/92
CPCB01J23/892B01J35/0033B01J35/1004B01J37/0018B01J37/343B82Y30/00B82Y40/00H01M4/921Y02E60/50
Inventor 王鸿静李英豪王自强许友王亮
Owner ZHEJIANG UNIV OF TECH
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