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A kind of catalyst of two-dimensional nickel telluride supporting palladium single atom and its preparation method and application

A nickel telluride and catalyst technology is applied in the field of two-dimensional nickel telluride-supported palladium single-atom catalyst and its preparation field, and can solve the problems of limited production quantity of noble metal-based catalyst, reduced catalytic activity, weak contact of carrier and easy falling off, and the like, To achieve the effect of improving the utilization of Pd atoms, the charge transfer ability, and the activity

Active Publication Date: 2021-11-09
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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  • A kind of catalyst of two-dimensional nickel telluride supporting palladium single atom and its preparation method and application
  • A kind of catalyst of two-dimensional nickel telluride supporting palladium single atom and its preparation method and application
  • A kind of catalyst of two-dimensional nickel telluride supporting palladium single atom and its preparation method and application

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, wash 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 -160 and 1 mg potassium chloropalladate were dispersed in 1 mL deionized water, ultrasonicated for 30 min, stirred for 1 h, heated and evaporated to dryness to remove water; then placed in a reaction boat, at 350 ° C, N 2 Under the protection of atmosphere, anneal and heat treatment for 2h, and then the obtained solid sample was washed with 0.1M HCl to remove impurity potassium oxide, and a two-dimensional ni...

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 single atom catalyst and its preparation method and application. The catalyst uses two-dimensional nickel telluride nanosheets as a carrier to support palladium single atoms; The thickness n of the two-dimensional nickel telluride nanosheets is 0<n≤5nm, and the palladium single atom loading is 0.1-0.5wt%; the preparation method is to use nickel nitrate, urea and ammonium fluoride as raw materials and prepare by hydrothermal method Ni(OH) 2 ; and then react with sodium tellurite and hydrazine hydrate in a solvent to prepare two-dimensional nickel telluride nanosheets; two-dimensional nickel telluride nanosheets are immersed in palladium salt solution, annealed and pickled to obtain the catalyst . The catalyst can not only prevent the agglomeration and shedding of Pd single atoms, but also further improve its ability to absorb oxygen and dissociate products, thereby enhancing the electrocatalytic activity.

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 Patents(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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