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Method and application of preparing supported palladium carbon catalyst by self-polymerization of dopamine

A supported palladium and carbon catalyst technology, applied in electrochemical generators, fuel cells, structural parts, etc., can solve the problems of cumbersome steps and inconsistencies, and achieve the effects of simple preparation method, simple operation and few steps.

Active Publication Date: 2019-04-02
江阴智产汇知识产权运营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method can be used to prepare supported palladium carbon catalysts, the steps are relatively cumbersome, and chemical reducing agents or reducing gases are often used, which does not meet the current green synthesis requirements.

Method used

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  • Method and application of preparing supported palladium carbon catalyst by self-polymerization of dopamine
  • Method and application of preparing supported palladium carbon catalyst by self-polymerization of dopamine
  • Method and application of preparing supported palladium carbon catalyst by self-polymerization of dopamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of supported palladium carbon catalyst

[0032] Prepare 0.05 mol / L Tris-HCl (pH 8.5) solution and 50 mmol / L K 2 PdCl 4 solution, ready for use; weigh 0.095 g of dopamine hydrochloride powder and dissolve it with 10 mL of prepared Tris-HCl solution; add 0.25 mL of prepared K 2 PdCl 4 After mixing the solution thoroughly, leave it open at room temperature; after reacting for 24 hours, centrifuge the black product and dry it in an oven at 40°C for 12 hours; keep the collected product in an inert atmosphere at 600°C for 2 h; after cooling, the product is collected to obtain a supported palladium-carbon catalyst, which is denoted as Pd / C(PDA)-1. As determined by ICP-OES, the content of Pd in ​​the synthesized catalyst was 1.3 wt%.

[0033] figure 1 It is a flow chart for the preparation of the supported palladium-carbon catalyst proposed by the present invention. Using DA as a carbon source, the palladium precursor is reduced to palladium metal particles...

Embodiment 2

[0043] 1. Preparation of supported palladium carbon catalyst

[0044] Prepare 0.05 mol / L Tris-HCl (pH 8.5) solution and 50 mmol / L K 2 PdCl 4 solution, ready for use; weigh 0.095 g of dopamine hydrochloride powder and dissolve it with 10 mL of prepared Tris-HCl solution; add 0.50 mL of prepared K 2 PdCl 4 After mixing the solution thoroughly, leave it open at room temperature; after reacting for 24 hours, centrifuge the black product and dry it in an oven at 40°C for 12 hours; keep the collected product in an inert atmosphere at 600°C for 2 h; after cooling, the product is collected to obtain a supported palladium-carbon catalyst, which is denoted as Pd / C(PDA)-2. As determined by ICP-OES, the content of Pd in ​​the synthesized catalyst was 2.1 wt%.

[0045] 2. Electrocatalytic oxidation of methanol in alkaline environment

[0046] Weigh 5 mg of catalyst and put it in 4 mL of Nafion solution (0.2 wt%), after ultrasonic mixing for 30 min, add 50 μL dropwise on the surface of...

Embodiment 3

[0048] 1. Preparation of supported palladium carbon catalyst

[0049] Prepare 0.05 mol / L Tris-HCl (pH 8.5) solution and 50 mmol / L K 2 PdCl 4 solution, ready for use; weigh 0.095 g of dopamine hydrochloride powder and dissolve it with 10 mL of prepared Tris-HCl solution; add 1.00 mL of prepared K 2 PdCl 4 After mixing the solution thoroughly, leave it open at room temperature; after reacting for 24 hours, centrifuge the black product and dry it in an oven at 40°C for 12 hours; keep the collected product in an inert atmosphere at 600°C for 2 h; after cooling, the product is collected to obtain a supported palladium-carbon catalyst, which is denoted as Pd / C(PDA)-3. As determined by ICP-OES, the content of Pd in ​​the synthesized catalyst was 3.7 wt%.

[0050] 2. Electrocatalytic oxidation of methanol in alkaline environment

[0051] Weigh 5 mg of catalyst and put it in 4 mL of Nafion solution (0.2 wt%), after ultrasonic mixing for 30 min, add 50 μL dropwise on the surface of...

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Abstract

The invention belongs to the technical field of preparation, relates to preparation of supported palladium / carbon catalyst and particularly relates to a method for preparing supported palladium / carbon catalyst through self-polymerization of dopamine, and application. The method for preparing the supported palladium / carbon catalyst through self-polymerization of dopamine comprises the steps of enabling metal precursor chloropalladite and DA to automatically carry out oxidation-reduction reaction in an alkalescence (pH 8.5) environment, thereby obtaining Pd / PDA compound; and carbonizing Pd / PDA compound in inert atmosphere (N2), thereby obtaining the supported Pd / C(PDA) catalyst. The preparation method disclosed by the invention is very simple, is few in step and convenient in operation. Through control of input of the metal precursor, the capacity of precious metal can be controlled. The supported palladium / carbon catalyst prepared by the method has excellent activity for electrocatalytic oxidation of methanol in the alkaline environment and has good application prospect in the field of a low-temperature methanol fuel cell.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and relates to the preparation of supported palladium-carbon catalysts, in particular to a method and application for preparing supported palladium-carbon catalysts through self-polymerization of dopamine. Background technique [0002] Noble metal palladium-based catalysts have good catalytic performance for many chemical reactions, and are widely used in petrochemical, biopharmaceutical, energy saving and environmental protection and other fields. In order to improve the use efficiency of noble metals, some inert supports are often used to load active noble metals. On the one hand, these supports can provide a large loading surface for noble metals, and on the other hand, they can provide support for the uniform dispersion of noble metal particles. In addition, certain supports can affect the hydrophilicity and hydrophobicity, adsorption characteristics, electron density, etc. of m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M8/1009
CPCH01M4/926H01M8/1009Y02E60/50
Inventor 牛湘衡张文驰李欣邱凤仙何艳芳潘建明
Owner 江阴智产汇知识产权运营有限公司
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