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A kind of phosphorus-nickel-palladium co-doped carbon-based composite catalyst and preparation method and application thereof

A composite catalyst and co-doping technology, used in structural parts, electrical components, battery electrodes, etc., can solve the problems of limited reserves, difficult to large-scale commercial application, and expensive Pt catalysts, achieving low price, excellent Electrocatalytic performance, the effect of abundant raw materials

Active Publication Date: 2020-11-06
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Pt catalysts used to catalyze the oxygen reduction reaction (ORR) at the cathode of fuel cells are expensive and have limited reserves, so it is difficult to carry out large-scale commercial applications

Method used

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  • A kind of phosphorus-nickel-palladium co-doped carbon-based composite catalyst and preparation method and application thereof
  • A kind of phosphorus-nickel-palladium co-doped carbon-based composite catalyst and preparation method and application thereof
  • A kind of phosphorus-nickel-palladium co-doped carbon-based composite catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Preparation of Nickel / Palladium Diacetyl Oxime

[0083] (1) Weigh about 20.7 mg (± 1 mg) of potassium tetrachloropalladate and 150 mg of nickel sulfate into 400 mL of tertiary water, and stir thoroughly on a magnetic stirrer to obtain a light green transparent solution.

[0084] (2) Weigh about 146 mg (±1 mg) of dimethylglyoxime and dissolve it in 12 mL of ethanol, dissolve it quickly by ultrasonication, and adjust the pH to 9-10 by adding NaOH dropwise.

[0085] (3) Under the agitation of the magnetic stirrer, add the dimethylglyoxime solution dropwise to the solution, and a red precipitate is formed rapidly. After the dropwise addition is completed, continue to stir for 30 minutes, and let it settle.

[0086] (4) The red precipitate was separated by suction filtration, washed three times with distilled water and ethanol respectively, and finally placed in an oven to dry at 80°C for 12 hours to obtain a red product, which was labeled as dimethylglyoxime nickel / palladiu...

Embodiment 2

[0088] With the dimethylglyoxime nickel / palladium of embodiment 1 gained as precursor, prepare catalyst of the present invention

Embodiment 3

[0105] Comparing the Catalytic Performance of Catalysts with Different Components

[0106] Disperse 2 mg of the catalyst obtained in Example 2, Comparative Example 1 and Comparative Example 2 into a mixed solution of 800 μL of water and 200 μL of isopropanol, and ultrasonically disperse evenly to obtain 2 mg mL -1 catalyst dispersion. When studying the catalytic performance, it is necessary to drop 15 μL (dropping three times, 5 μL each time) of the three catalysts obtained in this patent onto the RDE electrode (S=0.1256cm 2 ), after being completely dried, 2 μL of 0.5% Nafion solution was finally added dropwise, and its ORR electrocatalytic performance was measured on a CHI 832B electrochemical workstation. The above electrocatalytic performance tests all use the Ag / AgCl (3M NaCl) electrode as the reference electrode, the Pt wire electrode (0.5mm in diameter) as the counter electrode, the scan rate is 10mV / s, and the electrolyte is 0.1M KOH. Before the ORR catalytic performan...

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Abstract

The invention belongs to the technical field of new energy materials and relates to a phosphorus-nickel-palladium co-doped carbon-based composite catalyst and a preparation method and application thereof. A preparation process includes steps: subjecting metal salt and dimethylglyoxime to reaction to obtain a precursor being one of dimethylglyoxime nickel, dimethylglyoxime palladium or palladium-doped dimethylglyoxime nickel, wherein the metal salt refers to bivalent nickel or palladate; decomposing sodium hypophosphite to obtain hydrogen phosphide and phosphate, and subjecting a product obtained through direct chemical reaction of hydrogen phosphide and the precursor to chemical reaction to acid soaking to obtain the phosphorus-nickel-palladium co-doped carbon-based composite catalyst. Thecatalyst has excellent catalytic performances and is effective in an electro-catalysis process; under the joint action of phosphorus-nickel-palladium co-doping, better effects than those of nickel-phosphorus doping and palladium-phosphorus doping are achieved; in cathodic oxygen reduction reaction in an ORR electro-catalysis process, high electron transfer quantity, low hydrogen peroxide yield, high catalyst stability and excellent methanol tolerance are realized.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and specifically relates to a carbon-based composite non-platinum catalyst co-doped with phosphorus, nickel, and palladium, which uses dimethylglyoxime nickel / palladium as a precursor, and also relates to a preparation method of the catalyst and its incorporation in alkali Application of Electrocatalytic Oxygen Reduction Reaction in Sexual Electrolyte Background technique [0002] As the world's energy crisis becomes more severe, the development of clean, efficient and sustainable energy has become an urgent task. In recent years, due to its high efficiency and environmental friendliness, fuel cells have gradually shown their importance. Pt catalysts used to catalyze the oxygen reduction reaction (ORR) at the cathode of fuel cells are expensive and have limited reserves, so it is difficult to carry out large-scale commercial applications. Therefore, in order to improve the competit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/96
CPCH01M4/8647H01M4/96Y02E60/50
Inventor 李海波董雪
Owner LIAOCHENG UNIV
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