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Platinum-based alloy nanotube with platinum skin as well as preparation method and application of platinum-based alloy nanotube

A platinum-based alloy, nanotube technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, to achieve simple and easy preparation methods, simple preparation methods, and inhibition of Ostwalder ripening effect. Effect

Active Publication Date: 2021-12-21
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the prior art still lacks a method for the synthesis of platinum-based alloy nanotube catalysts with simple preparation methods and high catalytic efficiency.

Method used

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  • Platinum-based alloy nanotube with platinum skin as well as preparation method and application of platinum-based alloy nanotube
  • Platinum-based alloy nanotube with platinum skin as well as preparation method and application of platinum-based alloy nanotube
  • Platinum-based alloy nanotube with platinum skin as well as preparation method and application of platinum-based alloy nanotube

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Embodiment 1

[0029] A preparation method of a platinum-based alloy nanotube catalyst with a platinum skin, comprising the following steps:

[0030] (1) Synthesis of platinum-copper-tellurium alloy nanotubes: disperse 0.2mmol tellurium nanowires, 0.5mmol ascorbic acid and 0.125g polyoxyethylene-polyoxypropylene-polyoxyethylene triblock polymer F127 in 25mL deionized water and sonicate for 1h A homogeneous suspension was obtained. To the above solution, 2 mL of chloroplatinic acid solution (0.1 M) and 1 mL of copper chloride solution (0.1 M) were sequentially added. Then reflux at 95°C for 4h in an oil bath. The reacted samples were washed three times with water / ethanol, and dried overnight at 60°C.

[0031] (2) Synthesis of platinum-copper-tellurium supported on carrier carbon: 20 mg of platinum-copper-tellurium alloy nanotubes and 15 mg of carrier carbon XC-72R were added to a mixed solution of ethanol and cyclohexane, and stirred continuously for 56 h. The obtained samples were washed ...

Embodiment 2

[0033] A preparation method of a platinum-based alloy nanotube catalyst with a platinum skin, comprising the following steps:

[0034] (1) Synthesis of platinum-copper-tellurium alloy nanotubes: disperse 0.2mmol tellurium nanowires, 0.5mmol ascorbic acid and 0.125g polyoxyethylene-polyoxypropylene-polyoxyethylene triblock polymer F127 in 25mL deionized water and sonicate for 1h A homogeneous suspension was obtained. To the above solution, 1 mL of chloroplatinic acid solution (0.1 M) and 1 mL of copper chloride solution (0.1 M) were sequentially added. Then reflux at 95°C for 4h in an oil bath. The reacted samples were washed three times with water / ethanol, and dried overnight at 60°C.

[0035] (2) Synthesis of platinum-copper-tellurium supported on carrier carbon: 20 mg of platinum-copper-tellurium alloy nanotubes and 15 mg of carrier carbon XC-72R were added to a mixed solution of ethanol and cyclohexane, and stirred continuously for 56 h. The obtained samples were washed ...

Embodiment 3

[0037] A preparation method of a platinum-based alloy nanotube catalyst with a platinum skin, comprising the following steps:

[0038] (1) Synthesis of platinum-copper-tellurium alloy nanotubes: disperse 0.2mmol tellurium nanowires, 0.5mmol ascorbic acid and 0.125g polyoxyethylene-polyoxypropylene-polyoxyethylene triblock polymer F127 in 25mL deionized water and sonicate for 1h A homogeneous suspension was obtained. To the above solution, 3 mL of chloroplatinic acid solution (0.1 M) and 1 mL of copper chloride solution (0.1 M) were sequentially added. Then reflux at 95°C for 4h in an oil bath. The reacted samples were washed three times with water / ethanol, and dried overnight at 60°C.

[0039] (2) Synthesis of platinum-copper-tellurium supported on carrier carbon: 20 mg of platinum-copper-tellurium alloy nanotubes and 15 mg of carrier carbon XC-72R were added to a mixed solution of ethanol and cyclohexane, and stirred continuously for 56 h. The obtained samples were washed ...

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Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a platinum-based alloy nanotube with a platinum skin as well as a preparation method and application of the platinum-based alloy nanotube. The preparation method comprises the following steps: uniformly mixing tellurium nanowires, a reducing agent and a surfactant to obtain turbid liquid, and then adding platinum metal salt and copper metal salt solutions into the turbid liquid for reaction to obtain the platinum-copper-tellurium alloy nanotube. The tellurium nanowires are used as a hard template, and the platinum-based alloy nanotube with the platinum skin which is regular in shape and uniform in size is prepared through a solvothermal reduction method. The preparation method is simple and easy to implement, meanwhile, the platinum skin structure is arranged, therefore, compared with a commercial platinum-carbon catalyst, the obtained ternary alloy shows more excellent electrocatalytic activity and stability in oxygen reduction reaction catalysis.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a platinum-based alloy nanotube with a platinum skin and a preparation method and application thereof. Background technique [0002] Fuel cells have attracted extensive attention due to their high energy conversion rate, abundant fuel resources, and environmental friendliness. A fuel cell is a device that converts chemical energy into electrical energy through the oxidation-reduction reaction of oxygen and fuel. The anode reaction is the oxidation of fuel, and the cathode reaction is the oxygen reduction reaction (ORR). Theoretically, with sufficient fuel supply, the fuel cell can continuously provide power output. Compared with fast anodic oxidation, cathodic ORR involves a complicated multi-step proton-coupled electron transfer process, so its slow kinetics determine the performance and cost of fuel cells. This usually requires efficient catalysts to accelerate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00H01M4/90H01M4/92
CPCB22F9/24B82Y40/00H01M4/921H01M4/926H01M4/9041H01M4/9083B82Y30/00H01M2004/8689Y02E60/50
Inventor 夏宝玉牛慧婷
Owner HUAZHONG UNIV OF SCI & TECH
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