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Palladium-tin nano-chain network catalyst and preparation method and application thereof

A technology of nano chains and catalysts, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as hidden safety hazards and environmental pollution, and achieve high practical value, easy operation and repeatability high effect

Inactive Publication Date: 2018-07-31
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current preparation of palladium-tin alloys often requires the help of highly toxic reducing agents (such as sodium borohydride, oleylamine, hydrazine hydrate), etc., and the use of highly toxic reducing agents is likely to cause environmental pollution and have potential safety hazards

Method used

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  • Palladium-tin nano-chain network catalyst and preparation method and application thereof
  • Palladium-tin nano-chain network catalyst and preparation method and application thereof
  • Palladium-tin nano-chain network catalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The preparation method of the present embodiment 1 palladium tin nano-chain network catalyst comprises the following steps:

[0038] (1) Add 60mg of polyvinylpyrrolidone (PVP) to 30mL of ethylene glycol solution and sonicate for 10min with a power of 600W;

[0039] (2) Add 22.74mg of ammonium chloropalladate, 4.53mg of stannous chloride dihydrate and 15mg of citric acid into the solution obtained in step (1) and sonicate for 5min with a power of 600W;

[0040] (3) Transfer the mixed solution obtained in step (2) to a 50mL hydrothermal kettle, heat to 80°C for 3h, then raise the temperature to 220°C for 15h;

[0041] (4) The product obtained in step (3) is mixed solution of ethanol and water with a volume ratio of 1:1 at 15000rpm min -1 Centrifuge for 20 minutes at a high speed, repeat washing 3 times, and then ultrasonicate for 10 minutes at a power of 600W to disperse in 10 mL of ethanol;

[0042] (5) Add 19.23mg of XC-72 carbon powder into 20mL of ethanol and sonica...

Embodiment 2

[0050] The preparation method of the present embodiment 2 palladium tin nano-chain network catalyst comprises the following steps:

[0051] (1) Add 60mg of polyvinylpyrrolidone (PVP) to 30mL of ethylene glycol solution and sonicate for 10min with a power of 600W;

[0052] (2) Add 22.74mg of ammonium chloropalladate, 4.53mg of stannous chloride dihydrate and 15mg of citric acid into the solution obtained in step (1) and sonicate for 5min with a power of 600W;

[0053] (3) Transfer the mixed solution obtained in step (2) to a 50mL hydrothermal kettle, heat to 90°C for 3h, then raise the temperature to 200°C for 10h;

[0054] (4) The product obtained in step (3) is mixed solution of ethanol and water with a volume ratio of 1:1 at 15000rpm min -1 Centrifuge at the speed of 20min, and repeat cleaning 3 times, then ultrasonic for 10min, the power is 600W, make it dispersed in 10ml ethanol;

[0055] (5) Add 19.23mg of XC-72 carbon powder into 20mL of ethanol and sonicate for 30min ...

Embodiment 3

[0063] The preparation method of the present embodiment 3 palladium tin nano-chain network catalyst comprises the following steps:

[0064] (1) Add 60mg of polyvinylpyrrolidone (PVP) to 30mL of ethylene glycol solution and sonicate for 10min with a power of 600W;

[0065] (2) Add 22.74mg of ammonium chloropalladate, 4.53mg of stannous chloride dihydrate and 15mg of citric acid into the solution obtained in step (1) and sonicate for 5min with a power of 600W;

[0066] (3) Transfer the mixed solution obtained in step (2) to a 50mL hydrothermal kettle, heat to 80°C for 3h, then raise the temperature to 220°C for 10h;

[0067] (4) The product obtained in step (3) is mixed solution of ethanol and water with a volume ratio of 1:1 at 15000rpm min -1 Centrifuge at the speed of 20min, and repeat cleaning 3 times, then ultrasonic for 10min, the power is 600W, make it dispersed in 10ml ethanol;

[0068] (5) Add 19.23mg of XC-72 carbon powder into 20mL of ethanol and sonicate for 30min ...

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Abstract

The invention belongs to the technical field of catalyst preparation and relates to a palladium-tin nano-chain network catalyst and a preparation method and application thereof. The method comprises the following steps of (1) adding polyvinyl pyrrolidone to a glycol solution and carrying out ultrasonic mixing evenly; (2) adding ammonium chloropalladate, stannous chloride dehydrate and citric acidto a solution obtained in the step (1) and dispersing evenly under ultrasonic conditions; (3) transferring a mixed solution obtained in the step (2) into a hydrothermal reactor, carrying out heating and heat preservation for a period of time and then carrying out temperature reaction for a period of time; (4) cleaning a product obtained in the step (3) and then ultrasonically dispersing the product into ethanol; (5) adding XC-72 carbon powder to the ethanol and dispersing evenly under the ultrasonic conditions; (6) adding the solution obtained in the step (4) to the solution obtained in the step (5) and carrying out ultrasonic mixing evenly; and (7) cleaning the product obtained in the step (6) and then carrying out vacuum drying. The catalyst prepared through the method has very high electrochemically active specific surface area and formic acid oxidative catalytic activity, and is simple in operation and suitable for large-scale preparation.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and relates to a palladium-tin nano-chain network catalyst and a preparation method and application thereof. Background technique [0002] Direct formic acid fuel cells using liquid formic acid as fuel have high energy conversion efficiency and are environmentally friendly, and have shown great application potential as automobile power and portable power sources. Formic acid oxidation is an essential anode catalytic reaction for direct formic acid fuel cells. At present, the commonly used palladium / carbon catalysts have insufficient catalytic activity for formic acid oxidation and cannot meet the needs of current commercialization. In order to speed up the commercialization process of direct formic acid fuel cells, it is particularly important to research and prepare high-performance formic acid oxidation catalysts. Compared with palladium, tin metal is relatively cheap and has abu...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/88H01M8/1009B82Y30/00
CPCB82Y30/00H01M4/88H01M4/921H01M8/1009Y02E60/50
Inventor 张连营巩玉燕吴棣本徐秉辉赵修松
Owner QINGDAO UNIV
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