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Cobalt-coated carbon-supported platinum catalyst with proton transport function and a preparation method thereof

A platinum catalyst and carbon-coated technology, which is applied in nanotechnology for materials and surface science, electrical components, battery electrodes, etc., can solve problems affecting the utilization rate of catalysts, optimize electrocatalytic activity, reduce costs, and improve The effect of utilization

Active Publication Date: 2019-01-25
中能源工程集团氢能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the catalytic layer prepared by Pt / C catalyst and proton exchange solution (such as Nafion D520), the ionic phase (such as Nafion polymer) is in the state of disordered nano-film, and most of the ion exchange resin covers the Pt surface. or no coverage, which strongly affects the three-phase reaction interface (simultaneously possessing electrons, protons and gas transport channels) and the utilization rate of the catalyst in the catalytic layer, in fact, the actual utilization rate of the Pt catalyst is less than 40%

Method used

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  • Cobalt-coated carbon-supported platinum catalyst with proton transport function and a preparation method thereof
  • Cobalt-coated carbon-supported platinum catalyst with proton transport function and a preparation method thereof
  • Cobalt-coated carbon-supported platinum catalyst with proton transport function and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Dissolve 1g EC-300 carbon black carrier in 10ml of melamine aqueous solution with a concentration of 0.03g / mL, immerse it for 10h, place it in a vacuum drying oven at 80°C for 15h, and place it in N 2 Heat treatment at 500 °C for 2 h in an atmosphere, and grind for later use.

[0039] 2. Adopt electroless plating method to analyze pure CoSO 4 .7H 2 O, CoCl 2 .6H 2 O was used as cobalt source, hydrazine hydrate was used as reducing agent, and PdCl was added. 4 As an activator, increases the wrap rate. In the coating process, KOH is used as the dispersant, and the pH is preferably controlled at 12.5. The ratio of alkali to hydrazine was 6:1, and the reaction temperature was controlled at 89 °C to prepare a core-shell structure of a Co-coated layer C@Co on the surface of the doped carbon black.

[0040] 3. Take 0.18 g of the treated C@Co core-shell structure particles and place them in an autoclave, add perfluoro 3,6-dioxa-4-methyl-7-octenesulfonyl fluoride (PSVE)...

Embodiment 2

[0057] 1. Dissolve 1g of XC-72 carbon black carrier in 15ml of an aqueous solution of melamine with a concentration of 0.03g / mL, soak it for 10h, place it in a vacuum drying oven at 80°C for 15h, and place it in N 2 Heat treatment at 500 °C for 2 h in an atmosphere, and grind for later use.

[0058] 2. Adopt electroless plating method to analyze pure CoSO 4 .7H 2 O, CoCl 2 .6H 2 O was used as cobalt source, hydrazine hydrate was used as reducing agent, and PdCl was added. 4 As an activator, increases the wrap rate. During the coating process, KOH was used as the dispersant, and the pH was controlled at 12. The ratio of alkali to hydrazine was 5:1, and the reaction temperature was controlled at 90 °C. A Co-coated layer C@Co core-shell structure was prepared on the surface of the doped carbon black.

[0059] 3. Take 0.12 g of the treated C@Co core-shell structure and place it in an autoclave, add an aqueous solution of perfluoro 3,6-dioxa-4-methyl-7-octenesulfonyl fluoride...

Embodiment 3

[0068] 1. Dissolve 1 g of EC-300 carbon black carrier in 20 mL of an aqueous solution of pyridine with a concentration of 0.05 g / mL, soak for 10 h, place it in a vacuum drying oven at 80 °C for 15 h, and place it in N 2 Heat treatment at 500 °C for 2 h in an atmosphere, and grind for later use.

[0069] 2. Adopt electroless plating method to analyze pure CoSO 4 .7H 2 O, CoCl 2 .6H 2 O was used as cobalt source, hydrazine hydrate was used as reducing agent, and PdCl was added. 4 As an activator, increases the wrap rate. In the coating process, KOH is used as the dispersant, and the pH is preferably controlled at 12.5. The ratio of alkali to hydrazine was 6:1, and the reaction temperature was controlled above 85 °C to prepare a core-shell structure of a Co-coated layer C@Co on the surface of the doped carbon black.

[0070] 3. Take 0.12 g of the treated Co-coated C@Co core-shell structure and place it in an autoclave, add perfluoro 3,6-dioxa-4-methyl-7-octenesulfonyl fluor...

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Abstract

The invention discloses a cobalt-coated carbon-supported platinum catalyst Pt / (C @ Co) with proton transport function and a preparation method thereof. The method comprises the following steps: (1) soaking graphene with nitrogen source or sulfur source ionic liquid to obtain heteroatom-doped carbon black; (2) The core-shell structure of C @ Co coated on the surface of heteroatom doped carbon blackwas prepared by electroless plating. 3) polymerize that obtained C @ Co core-shell structure with sulfonyl monome, tetrafluoroethylene, assistant, initiator and organic solvent, and winding an appropriate amount of perfluoroSO2F polymer on the sphere of C @ Co; (4) hydrolyzing the obtained product to convert the SO2F group into SO3-Na + / K + ion exchange group; 5) mix that obtained product with aplatinum precursor solution, wat and ethylene glycol, and treating with ultrasonic wave; 6, place that obtained mix solution in a microwave reactor and heating the reaction; 7) demulsify that obtainedcolloidal system aft the reaction is finished and filtering; (8) Post-treatment.

Description

technical field [0001] The invention belongs to the technical field of new energy and fuel cells, and particularly relates to a cobalt-coated carbon-supported platinum catalyst with proton transport function and a preparation method thereof. Background technique [0002] Energy is a material resource that provides various capabilities and power for human production and life, and is an important material basis for the national economy. With the development of the economy, the energy crisis is becoming more and more serious, and the energy problem has become a major problem facing the world today. Materials and how they are used are increasingly important. Fuel cell is an efficient and clean electrochemical power generation device. Proton exchange membrane fuel cell has the advantages of high energy conversion efficiency, no pollution, simple system structure, high energy density and convenient fuel carrying and replenishment, and has broad application prospects. [0003] Pla...

Claims

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Application Information

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IPC IPC(8): H01M4/92B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/925H01M4/926Y02E60/50
Inventor 刘畅王诚穆怀萍张向东王建龙
Owner 中能源工程集团氢能科技有限公司
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