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Preparation of Pd-Ni catalyst with KMnO4 modified carbon black as carrier

A catalyst and carrier technology, which is applied in the field of improving the performance of direct ethanol fuel cells, can solve problems such as hindering the commercial development of direct alcohol fuel cells, poor anti-poisoning ability, and high price, and achieves production cost reduction, performance improvement, and preparation method simple effect

Inactive Publication Date: 2020-04-24
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the expensive price, poor anti-poisoning ability, and poor stability in alkaline electrolytes of noble metal Pt catalysts have seriously hindered the commercial development of direct alcohol fuel cells.

Method used

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  • Preparation of Pd-Ni catalyst with KMnO4 modified carbon black as carrier
  • Preparation of Pd-Ni catalyst with KMnO4 modified carbon black as carrier
  • Preparation of Pd-Ni catalyst with KMnO4 modified carbon black as carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of direct ethanol fuel cell anode catalyst Pd 1 Ni 1 The preparation method of / AC comprises the steps:

[0018] (1) Mix Vulcan XC-72 carbon black with a certain concentration of KMnO 4 The solutions were blended, stirred for 12 hours, washed with water, and vacuum-dried at 70°C to obtain the modified carbon black carrier AC;

[0019] (2) Ultrasonic dispersion of the modified carbon black obtained in (1) and Virahol is made into a uniform solution A;

[0020] (3) PdCl 2 、NiCl 2 ·6H 2 O, citric acid and isopropanol ultrasonically make orange-yellow precursor solution B;

[0021] (4) Slowly add the precursor solution B to the solution A under constant stirring and stir for a certain period of time, then heat up to 80°C;

[0022] (5) Use a certain concentration of NaOH solution to adjust the pH of the solution to strong alkalinity, and add excess NaBH 4 Dilute the solution and continue to stir. After the temperature of the solution drops to room temperature,...

Embodiment 2

[0024] A kind of direct ethanol fuel cell anode catalyst Pd 1 Ni 1 The preparation method of / AC comprises the steps:

[0025] (1) Mix Vulcan XC-72 carbon black with a certain concentration of KMnO 4 The solutions were blended, stirred for 17 hours, washed with water, and vacuum-dried at 70°C to obtain the modified carbon black carrier AC;

[0026] (2) Ultrasonic dispersion of the modified carbon black obtained in (1) and Virahol is made into a uniform solution A;

[0027] (3) PdCl 2 、NiCl 2 ·6H 2 O, citric acid and isopropanol ultrasonically make orange-yellow precursor solution B;

[0028] (4) Slowly add the precursor solution B to the solution A under constant stirring and stir for a certain period of time, then heat up to 80°C;

[0029] (5) Use a certain concentration of NaOH solution to adjust the pH of the solution to strong alkalinity, and add excess NaBH 4 Dilute the solution and continue to stir. After the temperature of the solution drops to room temperature,...

Embodiment 3

[0031] A kind of direct ethanol fuel cell anode catalyst Pd 1 Ni 1 The preparation method of / AC material comprises the steps:

[0032] (1) Mix Vulcan XC-72 carbon black with a certain concentration of KMnO 4 The solutions were blended, stirred for 24 hours, washed with water, and vacuum-dried at 70°C to obtain the modified carbon black carrier AC;

[0033] (2) Ultrasonic dispersion of the modified carbon black obtained in (1) and Virahol is made into a uniform solution A;

[0034] (3) PdCl 2 、NiCl 2 ·6H 2 O, citric acid and isopropanol ultrasonically make orange-yellow precursor solution B;

[0035] (4) Slowly add the precursor solution B to the solution A under constant stirring and stir for a certain period of time, then heat up to 80°C;

[0036] (5) Use a certain concentration of NaOH solution to adjust the pH of the solution to strong alkalinity, and add excess NaBH 4 Dilute the solution and continue to stir. After the temperature of the solution drops to room temp...

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Abstract

The Pd1Ni1 / AC catalyst for the anode of a direct ethanol fuel cell is synthesized by taking carbon black pretreated by a potassium permanganate solution with a certain concentration as a carrier. Theactivity of the Pd1Ni1 / AC catalyst on ethanol reaction is superior to that of a palladium-carbon catalyst, and the stability is improved. Therefore, synthesis of the Pd1Ni1 / AC catalyst is of great significance to development of efficient and low-cost anode catalysts and promotion of commercial development of direct alcohol fuel cells.

Description

technical field [0001] The invention belongs to the field of improving the performance of direct ethanol fuel cells, using VulcanXC-72 carbon black pretreated by potassium permanganate solution as a carrier, and synthesizing the anode catalyst Pd by a precipitation co-reduction method 1 Ni 1 / AC, the catalyst preparation method is simple, Pd 1 Ni 1 The loading of Pd in ​​ / AC is lower than that of commercial palladium carbon, and the fabrication cost of the catalyst is reduced. In addition, the catalyst is expected to further improve the performance of direct ethanol fuel cells. Background technique [0002] The increasing demand for high-density energy in today's society is forcing more and more researchers to design efficient energy conversion and storage devices. Direct alcohol fuel cells have the characteristics of easily available fuel, high energy, and non-toxicity, and have attracted more and more attention. The anode catalyst is an important component of direct a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M8/1011
CPCH01M4/921H01M4/926H01M8/1013Y02E60/50
Inventor 赵世怀张蕾张小雨温昕徐雯雯杨紫博
Owner TIANJIN POLYTECHNIC UNIV
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