Preparation of nano-palladium material by employing polypeptide R5 template method, shape and form control and application in fuel cell

A morphology and template technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as unpublished literature or patent reports, and achieve the effects of stable properties, high electron transfer number, and high initial potential.

Inactive Publication Date: 2016-11-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the present invention, polypeptide palladium nanomaterials with different shapes are used for the research of oxygen reduction catalytic performance, and no published literature or patent reports have been seen yet.

Method used

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  • Preparation of nano-palladium material by employing polypeptide R5 template method, shape and form control and application in fuel cell
  • Preparation of nano-palladium material by employing polypeptide R5 template method, shape and form control and application in fuel cell
  • Preparation of nano-palladium material by employing polypeptide R5 template method, shape and form control and application in fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Dilute 9.86 μL of R5 polypeptide solution (4.97mM) to 1776.72 μL at room temperature according to the molar ratio of polypeptide to palladium element 1:60, add 76.28 μL of potassium chloropalladate solution (38.54mM) and mix, Stir for 15 min at a speed of 300 rpm.

[0035] (2) Add 147 μL of newly prepared sodium borohydride (NaBH 4 ) solution (0.1M) into the mixed solution, and continue magnetic stirring at the original speed for 1 h to obtain the polypeptide palladium nanocatalyst.

[0036] Catalytic performance test:

[0037] The electrochemical test and characterization was carried out in a test cell with a three-electrode system on a CHI 750E electrochemical workstation produced by Shanghai Chenhua Company. Among them, the platinum wire is the counter electrode, the Ag / AgCl electrode is the reference electrode, and the glassy carbon electrode loaded with the catalyst is the working electrode. Add 24.78 μL of aqueous catalyst solution dropwise on the surface o...

Embodiment 2

[0044] (1) According to the molar ratio of polypeptide to palladium element 1:90, dilute 6.57 μL of R5 polypeptide solution (4.97mM) to 1776.72 μL at room temperature, add 76.28 μL of potassium chloropalladate solution (38.54mM) and mix, in Stir for 15 min at a speed of 300 rpm.

[0045] (2) Add 147 μL of newly prepared sodium borohydride (NaBH 4 ) solution (0.1M) into the mixed solution, and continue magnetic stirring at the original speed for 1 h to obtain the polypeptide palladium nanocatalyst.

[0046] Catalytic performance test:

[0047] The electrochemical test and characterization was carried out in a test cell with a three-electrode system on a CHI 750E electrochemical workstation produced by Shanghai Chenhua Company. Among them, the platinum wire is the counter electrode, the Ag / AgCl electrode is the reference electrode, and the glassy carbon electrode loaded with the catalyst is the working electrode. Add 25.28 μL of aqueous catalyst solution dropwise on the surfa...

Embodiment 3

[0056] (1) According to the molar ratio of polypeptide to palladium element 1:120, at room temperature, dilute 4.93 μL of R5 polypeptide solution (4.97mM) to 1776.72 μL, add 76.28 μL of potassium chloropalladate solution (38.54mM) and mix, in Stir for 15 min at a speed of 300 rpm.

[0057] (2) Add 147 μL of newly prepared sodium borohydride (NaBH 4 ) solution (0.1M) into the mixed solution, and continue magnetic stirring at the original speed for 1 h to obtain the polypeptide palladium nanocatalyst.

[0058] Catalytic performance test:

[0059] The electrochemical test and characterization was carried out in a test cell with a three-electrode system on a CHI 750E electrochemical workstation produced by Shanghai Chenhua Company. Among them, the platinum wire is the counter electrode, the Ag / AgCl electrode is the reference electrode, and the glassy carbon electrode loaded with the catalyst is the working electrode. Add 25.56 μL of aqueous catalyst solution dropwise on the sur...

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Abstract

The invention discloses preparation of a palladium nano material employing polypeptide as a template, shape and form control and an application of the palladium nano material in oxygen reduction of a fuel cell as an efficient catalyst. The preparation has the advantages that (1) polypeptide introduced in preparation of the material has diversity and specificity, can be biodegraded, contains a self-assembled segment and can be used as a template agent for synthesizing palladium nano materials with different shapes and forms; (2) the synthesis process of the palladium nano material is convenient and fast (carried out under a simple stirring condition), and green and energy-saving (synthesized at a room temperature by employing water as a solvent), the shape and form are controllable (polypeptide palladium nano materials with different shape and form characteristics are synthesized at different Pd/R5 ratios in a regulating manner), and the product property is very stable; and (3) a series of palladium nano catalysts synthesized by the polypeptide R5 (SSKKSGSYSGSKGSKRRIL) as the template have the catalytic performance superior to that of commercial platinum carbon in the aspect of oxygen reduction and have a good application prospect; and a novel cathode material is provided for the fuel cell.

Description

technical field [0001] The invention uses polypeptide nanomaterials to efficiently catalyze oxygen reduction reactions, and belongs to the technical field of catalysts and new energy materials. In particular, it relates to the preparation of a noble metal bionano material catalyst, its shape regulation and its application in fuel cell cathode materials. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC) is a kind of fuel cell, which has the advantages of low operating temperature, fast start-up, high specific power, simple structure, and convenient operation. preferred energy source for stations, etc. The PEMFC single cell is composed of an anode, a cathode and a proton exchange membrane. The oxidation of hydrogen fuel occurs at the anode, and the reduction of oxygen occurs at the cathode. Both electrodes contain catalysts that accelerate the electrochemical reaction of the electrode. Due to the low reaction rate of the cathode, the cathode reaction is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/8803H01M4/8825H01M4/925Y02E60/50
Inventor 唐正华杨宏宇陈少伟
Owner SOUTH CHINA UNIV OF TECH
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