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A highly active electrocatalyst for polymer electrolyte membrane fuel cell and a preparation method thereof

An electrolyte membrane, fuel cell technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve problems such as single-atom catalysts that have not been seen, and achieve the effect of improving interaction and stability

Inactive Publication Date: 2019-01-04
北京海得利兹新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current single-atom catalysts mainly use CO2 reduction, oxygen reduction / hydrogen evolution and other reactions, but there are almost no reports of single-atom catalysts for the electrooxidation of small molecule alcohols.

Method used

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  • A highly active electrocatalyst for polymer electrolyte membrane fuel cell and a preparation method thereof
  • A highly active electrocatalyst for polymer electrolyte membrane fuel cell and a preparation method thereof
  • A highly active electrocatalyst for polymer electrolyte membrane fuel cell and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 10g of dicyandiamide and 0.1g of nickel acetylacetonate respectively, mix them uniformly mechanically, and then grind them repeatedly for about 6 hours to make them mix as uniformly as possible, place them in a tube furnace, use argon as an inert protective gas, and 1°C / min heating rate, raised to 300°C, heat treatment for 3 hours, then continued to heat up to 600°C, continued heat treatment for 3 hours, then raised the temperature to 800°C again, heat treated for 1 hour, cooled to room temperature under an inert atmosphere, and obtained nickel Monoatomically dispersed carbon nanotube supports. Weigh 0.1 g of the above-mentioned carbon nanotube carrier and place it in a round bottom flask, add 150 ml of ethylene glycol, and ultrasonically disperse for 30 minutes to disperse the carbon nanotube carrier evenly, and then add PdCl 2 The salt solution was continuously stirred for 3 hours, then ascorbic acid was added as an auxiliary reducing agent, and the stirring was...

Embodiment 2

[0032] Weigh 10g of dicyandiamide and 0.1g of iron acetylacetonate respectively, mechanically mix them uniformly, and then grind them repeatedly for about 6 hours to make the two as uniform as possible, place them in a tube furnace, use argon as an inert protective gas, and 1°C / min heating rate, raised to 300°C, heat treatment for 3 hours, then continued to heat up to 600°C, continued heat treatment for 3 hours, then raised the temperature to 900°C again, heat treated for 1 hour, and cooled to room temperature under an inert atmosphere to obtain iron Monoatomically dispersed carbon nanotube supports. Weigh 0.1 g of the above-mentioned carbon nanotube carrier and place it in a round bottom flask, add 150 ml of ethylene glycol, and ultrasonically disperse for 30 minutes to disperse the carbon nanotube carrier evenly, and then add PdCl 2 The salt solution was continuously stirred for 3 hours, then ascorbic acid was added as an auxiliary reducing agent, and the stirring was contin...

Embodiment 3

[0035] Weigh 10g of dicyandiamide and 0.1g of copper acetylacetonate respectively, mix them uniformly mechanically, and then grind them repeatedly for about 6 hours to make the two as uniform as possible, place them in a tube furnace, use argon as an inert protective gas, and 1°C / min heating rate, raised to 250°C, heat treatment for 3 hours, then continued to heat up to 600°C, continued heat treatment for 3 hours, then raised the temperature to 750°C again, heat treated for 1 hour, cooled to room temperature under an inert atmosphere, and obtained copper Monoatomically dispersed carbon nanotube supports. Weigh 0.1 g of the above-mentioned carbon nanotube carrier and place it in a round-bottomed flask, add 150 ml of ethylene glycol, and ultrasonically disperse for 30 minutes to disperse the carbon nanotube carrier evenly, and then add the PdCl required to prepare 30 wt% Pd nanoparticles. 2 The salt solution was continuously stirred for 3 hours, then ascorbic acid was added as a...

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Abstract

The invention discloses a high-activity electrocatalyst for polymer electrolyte membrane fuel cell and a preparation method thereof. The catalyst comprises a transition metal element monoatomically dispersed carbon nanotube material as a carrier and an active noble metal component supported on the carrier. The preparation method of the catalyst is as follows: A transition metal organometallic saltand dicyandiamide are ground and mixed, heat treatment in an inert atmosphere, A transition metal monoatomic dispersed carbon nanotube is obtained, the carbon nanotube carrier is dispersed in ethylene glycol, salts or acids containing noble metal elements are added into the carbon nanotube carrier, the noble metal catalyst supported on the transition metal monoatomic dispersed carbon nanotube isobtained after the transition metal monoatomic dispersed carbon nanotube carrier is uniformly dispersed by ultrasonic wave, ascorbic acid is added as an assisting reducing agent, and the transition metal monoatomic dispersed carbon nanotube is reduced by stirring. The catalyst of the invention exhibits superior electrocatalytic activity for small molecular alcohol species and oxygen reduction, andis a polymer electrolyte membrane fuel cell electrocatalytic material with wide application prospect.

Description

technical field [0001] The invention relates to a high-activity nanometer electrocatalyst for a polymer electrolyte membrane fuel cell and a preparation method thereof, belonging to the technical field of fuel cells. Background technique [0002] A proton exchange membrane fuel cell is an electrochemical device that efficiently and directly converts the chemical energy in fuels (such as hydrogen, methanol) and oxidants (such as oxygen, air, etc.) into electrical energy. It has broad application prospects in fields such as electric vehicles, portable mobile power supplies, and military affairs. However, the current commercialization process of fuel cells is greatly restricted by its dependence on precious metal platinum-based catalysts, which are scarce resources. In addition, the preparation, storage and transportation of hydrogen fuel is another major problem it faces. Direct alcohol fuel cells that use small molecule alcohol liquids (such as methanol, ethanol, etc.) One...

Claims

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Application Information

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IPC IPC(8): H01M4/92B82Y30/00
CPCB82Y30/00H01M4/921H01M4/926H01M2008/1095Y02E60/50
Inventor 蒋三平郭志斌张艳
Owner 北京海得利兹新技术有限公司
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