a pd 2 ptag nanocrystal and its preparation method and application

A nanocrystalline and crystalline phase technology, applied in the nano field, achieves the effects of efficient catalysis, low reaction temperature and simple process

Active Publication Date: 2017-05-10
江苏载驰科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although great progress has been made in the research of multi-component Pt-based metal nanocrystals, the Pd with special structure 2 Ag-based, doped Pt metal to obtain special branched Pt-based nanocrystals are less reported

Method used

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  • a pd <sub>2</sub> ptag nanocrystal and its preparation method and application
  • a pd <sub>2</sub> ptag nanocrystal and its preparation method and application
  • a pd <sub>2</sub> ptag nanocrystal and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] At room temperature, weigh 0.5 mmol Pd(NO 3 ) 2 . 2H 2 O and 0.25 mmol K 2 PtCl 6 Dissolve in 6 mL of OLA and 10 mL of LODE, and add all the materials together into a dry three-neck round bottom flask with a capacity of 250 mL. Transfer the three-necked round-bottom flask to a sand bath, raise the temperature to 250 °C for 10 min at a rate of 7 °C / min under programmed temperature control, and then add AgNO 3 solution (0.25 mmol AgNO 3 dissolved in 3 mL of OLA and 5 mL of ODE), and this incubation was continued for 20 min until the end of the reaction. After the reactor was naturally cooled to room temperature, an appropriate amount of ethanol was added to disperse, and the solid was separated by centrifugation. The solid was washed to obtain a black product, which was used for analysis and characterization after vacuum drying overnight in a vacuum oven.

[0031] Using EDS, XRD, TEM and STEM, mapping and line scan test to analyze the product respectively, the res...

Embodiment 2

[0035]In the three-electrode system, the electrochemical properties of the samples were tested by cyclic voltammetry and polarization curve method. The specific process is as follows:

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Abstract

The invention belongs to the field of nanometers, and specifically discloses a Pd2PtAg nanocrystal and its preparation method and application. The Pd2PtAg nanocrystal disclosed in the invention has a multi-legged shape, and its crystal phase is a face-centered cubic phase. This Pd2PtAg nanocrystal has excellent ORR performance. At the same time, due to the "one-pot cooking" preparation method and the programmed temperature control mode to obtain Pd2PtAg nanobody, it has the industrial characteristics of simple process, low reaction temperature and short time, and is suitable for mass production.

Description

technical field [0001] The invention discloses a Pd 2 The PtAg nano crystal and its preparation method and application belong to the field of nano. Background technique [0002] With the world's increasing energy needs and environmental problems, it is imminent to find clean energy. In recent years, the development and utilization of fuel cells has further broadened the scope of research in the field of energy. In the process of designing fuel cells, improving the reaction efficiency of the oxygen reduction reaction (ORR) has become the key to commercial applications. The most essential method is to improve the catalytic activity of the catalyst that catalyzes the oxygen reduction reaction. Literature studies have shown that Pt-based nanocrystals are considered to be the most effective catalysts for ORR. At the same time, it is worth noting that multicomponent Pt-based nanocrystals exhibit superior optical, electrical, magnetic, and catalytic properties compared to binar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00H01M4/92B82Y40/00B82Y30/00
CPCH01M4/921B82Y30/00B82Y40/00B22F9/24B22F1/07Y02E60/50
Inventor 刘苏莉陈昌云张辉包建春杨显清
Owner 江苏载驰科技股份有限公司
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