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Palladium-platinum-tellurium hollow cubic alloy nano-catalyst and preparation method thereof

A technology of alloy nano-cubes, applied in non-precious metal oxide coatings, electrode coatings, electrolytic components, etc., can solve the problems of lack of strong catalysis, and achieve the effects of environmental friendliness, strong catalysis, and strong quantum effect

Active Publication Date: 2022-02-15
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned problems, the present invention aims to provide a palladium-platinum-tellurium hollow cubic alloy nanocatalyst and its preparation method, aiming to solve the existing lack of a catalyst that can have a strong catalytic effect on the electrochemical oxidation of methanol molecules and has a simple preparation method. Alloy catalyst

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  • Palladium-platinum-tellurium hollow cubic alloy nano-catalyst and preparation method thereof
  • Palladium-platinum-tellurium hollow cubic alloy nano-catalyst and preparation method thereof
  • Palladium-platinum-tellurium hollow cubic alloy nano-catalyst and preparation method thereof

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preparation example Construction

[0026] Please refer to figure 1 , as shown in the figure, a kind of preparation method of palladium-platinum-tellurium hollow cubic alloy nanocatalyst provided by the present invention, said method comprises:

[0027] S10, dispersing the platinum source, tellurium source, quaternary ammonium salt and palladium nanocubes in water to obtain a mixed solution.

[0028] Specifically, combining figure 2 , the platinum source is mainly used to provide platinum (Pt) during the reaction process, and materials that can be used as a platinum source include but are not limited to chloroplatinic acid, potassium chloroplatinate, platinum acetylacetonate, or potassium chloroplatinite. The tellurium (Te) source is mainly used to provide Te during the reaction process. Materials that can act as a tellurium source include but are not limited to sodium tellurite, antimony dioxide, telluric acid, diphenyl ditelluride, potassium tellurite , Tellurium tetrachloride.

[0029] The quaternary ammo...

Embodiment 1

[0042] At pH 2, 0.1 μmol H 2 PtCl 6 Aqueous solution, 0.1 μmol Na 2 TeO 3 Aqueous solution, 1mmol hexadecyltrimethylammonium bromide aqueous solution, 0.1μg Pd nanocube aqueous solution were mixed evenly, 1μmol ascorbic acid aqueous solution was added, heated in 40°C water bath for 1h, the product was centrifuged and washed, and dried at 40°C to obtain PdPtTe alloy nanocatalysts with hollow cubic structure. Transmission electron microscopy characterization and elemental analysis of the obtained PdPtTe alloy nanocatalysts are shown in image 3 shown.

Embodiment 2

[0044] At pH 3, 1 μmol H 2 PtCl 6 Aqueous solution, 1 μmol Na 2 TeO 3 aqueous solution, 10 mmol cetyltrimethylammonium bromide aqueous solution, and 1 μg Pd nanocube aqueous solution were mixed, and 10 μmol ascorbic acid aqueous solution was added, heated in a 50°C water bath for 5 hours, centrifuged to wash the product, and dried at 40°C to obtain a hollow Cube-structured PdPtTe alloy nanocatalysts.

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Abstract

The invention discloses a palladium-platinum-tellurium hollow cubic alloy nano-catalyst and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a chloroplatinic acid aqueous solution, a sodium tellurite aqueous solution, a cetyl trimethyl ammonium bromide aqueous solution and a palladium nano-cube aqueous solution under the condition that the pH value is 2-4, adding an ascorbic acid aqueous solution, putting the mixture into a water bath, heating, centrifugally washing the product, and drying to obtain the palladium-platinum-tellurium hollow cubic alloy nano-catalyst with the hollow cubic structure. Under an alkaline condition, the palladium-platinum-tellurium hollow cubic alloy nano-catalyst has a very strong catalytic effect on electrochemical oxidation of methanol, the catalytic activity is higher than that of a commercial platinum-carbon catalyst or a tellurium-free palladium@platinum core-shell catalyst, and the maximum current densities are respectively increased by 4.5 and 0.5 times due to an alloy structure and a hollow structure of the palladium-platinum-tellurium catalyst.

Description

technical field [0001] The invention belongs to the technical field of alloy catalyst materials, and in particular relates to a palladium-platinum-tellurium hollow cubic alloy nano-catalyst and a preparation method thereof. Background technique [0002] The existing catalyst used for the electrochemical oxidation of methanol molecules is an alloy catalyst based on platinum-tellurium components, which has a strong catalytic effect and high catalytic stability. However, when preparing platinum-tellurium alloy nanocatalysts, the tellurium involved in the reaction is easily oxidized in the air, which is not conducive to the subsequent Galvani substitution reaction, and the obtained alloy has a single structure and morphology, and its properties are difficult to control. [0003] At present, there is a lack of an alloy catalyst that has a strong catalytic effect on the electrochemical oxidation of methanol molecules and is easy to prepare. [0004] Therefore, prior art still nee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/046C25B3/23C25B3/07
CPCC25B11/046C25B3/23C25B3/07
Inventor 张玲施裕和周慧文韩京龙王鸿程
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL