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Preparation method of PdAuAg hollow nanosheet electrocatalyst

An electrocatalyst and nanosheet technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of complex preparation process, and achieve the effects of low preparation cost, high yield, and uniform sheet thickness

Active Publication Date: 2019-05-10
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these preparation processes are complicated and some toxic organic substances are used in the process

Method used

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  • Preparation method of PdAuAg hollow nanosheet electrocatalyst
  • Preparation method of PdAuAg hollow nanosheet electrocatalyst
  • Preparation method of PdAuAg hollow nanosheet electrocatalyst

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Embodiment 1

[0028] A preparation method of PdAuAg hollow nanosheet electrocatalyst, comprising the steps of:

[0029] (1) Prepare AgNO with a concentration of 63mM 3 (as a silver source) DMF (N, N-dimethylformamide) solution and a concentration of 0.63M PVP (polyvinylpyrrolidone, as a covering agent) DMF solution;

[0030] (2) In a 40mL reactor, add 10mL AgNO 3 Slowly add 5mL of DMF solution of PVP to the DMF solution of PVP, continue to stir for 25min to obtain a yellow-brown solution, then move the above reaction kettle into an oven, react at 160°C for 4h, cool to room temperature, and obtain a brown-gray solution, namely silver nanosheet solution (Such as figure 1 shown);

[0031] (3) Transfer half of the above brown-gray solution to a 250mL round bottom flask, dilute with 50mL deionized water, and stir at 10°C for 30min;

[0032] (4) Slowly add 100mL of HAuCl with a concentration of 0.34mM to the material obtained in step (3) at a temperature of 10°C 4 solution, the dropwise addi...

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Abstract

The invention discloses a preparation method of a PdAuAg hollow nanosheet electrocatalyst. Reaction materials include silver nitrate, PVP, HAuCl4 and sodium tetrachloropalladate. The PdAuAg hollow nanosheet electrocatalyst prepared by the preparation method has good dispersivity and is of a hollow lamellar structure with a porous surface, the lamellar thickness is uniform and is about 40nm, the hollow nanosheet structure with the porous surface is beneficial to promoting the utilization efficiency and mass transfer process of the electrocatalyst, and moreover, a synergistic effect exists amongPd, Ag and Au so that the electrocatalytic activity and stability of the electrocatalyst can be promoted.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts, and in particular relates to a method for preparing PdAuAg hollow nanosheet electrocatalysts. Background technique [0002] Direct ethanol fuel cells (DEFCs) have attracted great attention due to their advantages such as easy fuel acquisition, convenient transportation and storage, high energy density, and environmental friendliness. For DEFCs, how to improve the efficiency of the anode catalyst and reduce the cost has always been the research interest of researchers. Platinum-based materials are often used as anode catalysts for DEFCs, but Pt has disadvantages such as high price, scarce reserves, and susceptibility to CO poisoning. Therefore, people consider palladium-based materials with relatively abundant reserves, relatively cheap price, and good resistance to CO poisoning to replace traditional platinum-based anode catalysts. [0003] In order to further reduce the cost of pallad...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M4/92C22C5/06C22C1/08
CPCY02E60/50
Inventor 彭程吴卾豫张庆谢阿勇
Owner HUAQIAO UNIVERSITY
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