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Method for preparing conductive polymer-rare-earth complex composite electric catalyst

A rare earth complex, conductive polymer technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as low initial potential

Active Publication Date: 2018-06-08
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with commercial Pt / C catalysts, the onset potential of N-doped carbon-based materials is still low, and the catalytic activities of oxygen reduction, oxygen evolution, and hydrogen evolution reactions need to be further improved.

Method used

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  • Method for preparing conductive polymer-rare-earth complex composite electric catalyst
  • Method for preparing conductive polymer-rare-earth complex composite electric catalyst
  • Method for preparing conductive polymer-rare-earth complex composite electric catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Rare earth complex Ce(TTA) 3 Preparation of Phen: Dissolve 0.4976 g 2-thienoyltrifluoroacetone (TTA) and 0.1481 g o-phenanthroline (Phen) in 20 mL of absolute ethanol, adjust the pH of the solution to 7, and dissolve the above solution under constant stirring Slowly add in cerium nitrate hexahydrate (CeN 3 o 9 ·6H 2 O) in ethanol solution (0.3242 g CeN 3 o 9 ·6H 2 O dissolved in 10 mL of absolute ethanol), when precipitation appeared, continue to react at 60°C for 5 hours, after standing still for 20 hours, centrifuge the precipitate, wash with ethanol and distilled water three times respectively, and place in a constant temperature blast drying oven Drying for 10 hours gives Ce(TTA) 3 Phen complexes.

[0038] (2) Preparation of polyaniline-rare earth complex composite electrocatalyst: take the rare earth complex Ce(TTA) prepared in step (1) 3 Phen 0.50 g and sodium dodecylbenzenesulfonate (C 18 h 29 NaO 3 S, 0.59 g), was added into 80 mL ultrapure water ...

Embodiment 2

[0041] (1) Rare earth complex La(TTA) 3 The preparation of Phen: 0.4976 g 2-thienoyltrifluoroacetone (TTA) and 0.1481 g o-phenanthroline (Phen) were dissolved in 20 mL of absolute ethanol, and the pH of the solution was adjusted to 7, and the above solution was dissolved under constant stirring. Slowly add in lanthanum nitrate hexahydrate (LaN 3 o 9 ·6H 2 O) in ethanol solution (0.3234 g LaN 3 o 9 ·6H 2 O dissolved in 10 mL of absolute ethanol), when precipitation appeared, continue to react at 60 °C for 5 hours, after standing still for 20 hours, centrifuge the precipitate, wash with ethanol and distilled water three times respectively, and place in a constant temperature blast drying oven After drying for 10 hours, La(TTA) was obtained 3 Phen complexes.

[0042] (2) Preparation of polyaniline-rare earth complex composite electrocatalyst: take the rare earth complex La(TTA) prepared in step (1) 3 Phen 1.00 g and sodium dodecylbenzenesulfonate (C 18 h 29 NaO 3 S, 0....

Embodiment 3

[0045] (1) Rare earth complex Pr(TTA) 3 The preparation of Phen: 0.4976 g 2-thienoyltrifluoroacetone (TTA) and 0.1481 g o-phenanthroline (Phen) were dissolved in 20 mL of absolute ethanol, and the pH of the solution was adjusted to 7, and the above solution was dissolved under constant stirring. Slowly drop in praseodymium chloride (PrCl 3 ) in ethanol solution (0.3241 g PrCl 3 dissolved in 10 mL of absolute ethanol), when precipitation occurs, continue to react at 60 °C for 5 hours, after standing still for 20 hours, centrifuge the precipitate, wash with ethanol and distilled water for 3 times, and dry in a constant temperature blast drying oven 10 hours, get Pr(TTA) 3 Phen complexes.

[0046] (2) Preparation of polyaniline-rare earth complex composite electrocatalyst: take the rare earth complex Pr(TTA) prepared in step (1) 3 Phen 1.50 g and sodium dodecylbenzenesulfonate (C 18 h 29 NaO 3 S, 0.59 g), was added into 80 mL ultrapure water for ultrasonic dispersion for 2...

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Abstract

The invention provides a method for preparing a conductive polymer-rare-earth complex composite electric catalyst. The method comprises the following steps: firstly, by taking 2-thenoyltrifluoroacetone and a phenanthroline rare-earth metal salt as raw materials, preparing a rare-earth complex according to a precipitation method; by taking ferric trichloride and ammonium persulfate as oxidants, preparing a conductive polymer wrapped rare-earth complex according to a chemical oxidation polymerization method, centrifuging a polymerization product, washing, drying, and carbonizing at a high temperature in the presence of a nitrogen atmosphere, thereby obtaining the conductive polymer-rare-earth complex composite electric catalyst. Due to a large active surface and high conductivity, the catalyst can be applied to fuel battery oxidation reduction, oxygen separation and hydrogen separation reactions, has the characteristics of being high in catalytic activity, good in anti-toxicity property,good in stability, and the like, and is an ideal catalyst for fuel batteries.

Description

technical field [0001] The invention relates to a preparation method of a conductive polymer-rare earth complex composite electrocatalyst, which is mainly used for the reactions of oxygen reduction, oxygen evolution and hydrogen evolution in fuel cells, and belongs to the technical field of preparation of non-precious metal catalysts. Background technique [0002] Oxygen reduction, oxygen evolution, and hydrogen evolution reactions are among the key reactions that affect the efficiency of many electrochemical conversion and storage devices, such as fuel cells and metal-air batteries, as they control the overall performance of these energy conversion and storage systems. Although platinum-based catalysts exhibited the best catalytic performance in these reactions, many key issues, including the high cost of platinum, scarcity of reserves, low stability, and susceptibility to poisoning (especially in the presence of CO or methanol), etc., remain This hinders their large-scale ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/90H01M4/9008H01M4/9016Y02E60/50
Inventor 雷自强康玉茂王伟李金梅陶鹏宇王鹏德
Owner NORTHWEST NORMAL UNIVERSITY
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