Two-dimensional nickel telluride supported palladium monatomic catalyst as well as preparation method and application thereof

A technology of nickel telluride and catalyst, which is applied in the field of two-dimensional nickel telluride-supported palladium single atom catalyst and its preparation, which can solve the problems of limited production of noble metal-based catalysts, easy agglomeration of noble metals, and reduced catalytic activity, so as to improve the Pd Atom utilization rate and charge transfer ability, solve environmental pollution, solve the effect of low efficiency

Active Publication Date: 2021-03-12
QUZHOU RES INST OF ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the preparation process of noble metal single-atom materials, the catalytic activity is greatly reduced due to the fact that noble metals are easy to agglomerate and fall off when they are not in firm contact with the support, and the production of noble metal-based catalysts is limited, making it difficult to realize their industrial applications.

Method used

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  • Two-dimensional nickel telluride supported palladium monatomic catalyst as well as preparation method and application thereof
  • Two-dimensional nickel telluride supported palladium monatomic catalyst as well as preparation method and application thereof
  • Two-dimensional nickel telluride supported palladium monatomic catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Ni(OH) 2 Precursor preparation

[0040] 0.34g of nickel nitrate hexahydrate, 0.074g of ammonium fluoride and 0.3g of urea were dissolved in 30mL of deionized water and stirred for 30min; placed in a 50mL hydrothermal reaction kettle, hydrothermally reacted at 120°C for 6h, filtered and deionized with Washed with water and ethanol, dried at 60°C for 12h to obtain nanosheet Ni(OH) 2 Precursor.

Embodiment 2

[0041] Example 2 NiTe 2 -160 and Pd / NiTe 2 Preparation of -160

[0042] (1) get the Ni(OH) prepared by embodiment 1 2 Disperse 0.2g of precursor, 0.442g of sodium tellurite and 3mL of hydrazine hydrate into 37mL of deionized water and stir for 1h; put it into a 50mL hydrothermal reactor, react at 160°C for 6h, filter the product, and wash it with deionized water and ethanol , dried at 60°C for 12h to obtain two-dimensional nickel telluride nanosheets, denoted as NiTe 2 -160.

[0043] (2) Take 0.1g of the two-dimensional nickel telluride nanosheet NiTe prepared in step (1) 2 Disperse -160 and 1mg potassium chloropalladate in 1mL deionized water, sonicate for 30min, stir for 1h, heat and evaporate to dryness, remove water; 2 Under the protection of atmosphere, annealing and heat treatment for 2h, and then the obtained solid sample was washed with 0.1M HCl to remove impurity potassium oxide, and the catalyst Pd / NiTe with two-dimensional nickel telluride supporting palladium ...

Embodiment 3

[0044] Example 3 NiTe 2 -180 and Pd / NiTe 2 Preparation of -180

[0045] According to the method of Example 2, the reaction temperature of step (1) was adjusted to 180°C to obtain two-dimensional nickel telluride nanosheets, which were denoted as NiTe 2 -180; Potassium chloropalladate in step (2) is 2mg, obtains catalyst Pd / NiTe 2 -160.

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Abstract

The invention relates to the technical field of nano catalytic materials, and discloses a two-dimensional nickel telluride supported palladium monatomic catalyst and a preparation method and application thereof.The catalyst takes a two-dimensional nickel telluride nanosheet as a carrier and loads palladium monatomic; wherein the thickness n of the two-dimensional nickel telluride nanosheet is greater than 0 nm and less than or equal to 5 nm, and the loading capacity of palladium single atoms is 0.1-0.5 wt%. The preparation method comprises the following steps: by taking nickel nitrate, urea and ammonium fluoride as raw materials, preparing Ni(OH)2 by a hydrothermal method; carrying out telluridation reaction on the two-dimensional nickel telluride nanosheet, sodium tellurite and hydrazinehydrate in a solvent to obtain a two-dimensional nickel telluride nanosheet; impregnating the two-dimensional nickel telluride nanosheet in a palladium salt solution, and then carrying out annealing and acid pickling to produce the catalyst. The catalyst not only can prevent Pd monogen from being agglomerated and falling off, but also can further improve the oxygen adsorption and product dissociation capacity of the catalyst, so that the electrocatalytic activity is improved.

Description

technical field [0001] The invention relates to the technical field of nanometer catalytic materials, in particular to a two-dimensional nickel telluride-supported palladium single atom catalyst, a preparation method and application thereof. Background technique [0002] h 2 o 2 It is a strong oxidizing agent. Its aqueous solution is widely used in the fields of chemical industry, medicine and food. It is often used as a fungicide, bleach and disinfectant. In addition, high concentration of H 2 o 2 The solution can also be used as rocket power fuel, so it has received widespread attention. Currently commonly used H 2 o 2 The synthesis method is the anthraquinone method, but its disadvantages such as complex process, many impurities in the product, high processing cost, and secondary pollution have limited its wide application. Furthermore, since H 2 o 2 The chemical properties are unstable, which brings safety problems to transportation and storage. In situ synthesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/054C25B11/067C25B11/081C25B1/30
CPCC25B1/30
Inventor 侯阳李燕杨彬雷乐成
Owner QUZHOU RES INST OF ZHEJIANG UNIV
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