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Efficient biomass carbon electrochemical oxygen reduction catalyst and preparation method and application thereof

A carbon-based catalyst and electrochemical technology, applied in the field of electrocatalysis, can solve the problems that the catalytic performance of low-cost catalysts cannot meet the requirements and high cost, and achieve the effects of improving electrocatalytic performance, low cost, and improved dispersion state.

Active Publication Date: 2018-06-08
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The problem to be solved by the present invention is to develop a brand-new biomass carbon for the development limitation of direct fuel cell and the current commercial catalyst cost of cathode oxygen reduction electrocatalyst is too high, and the catalytic performance of low-cost catalyst can not meet the requirements. Oxygen reduction catalyst and its method and application for preparing a catalyst with high electrocatalytic performance and excellent stability for oxygen reduction by using fungus fungus as raw material

Method used

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  • Efficient biomass carbon electrochemical oxygen reduction catalyst and preparation method and application thereof
  • Efficient biomass carbon electrochemical oxygen reduction catalyst and preparation method and application thereof
  • Efficient biomass carbon electrochemical oxygen reduction catalyst and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0044] Collect the wild fungus fungus, soak the collected fungus in excess deionized water and 45 Hz ultrasonic for 12 hours, and change the deionized water every 2 hours until the cleaning is completed. Put the ultrasonically cleaned fungus in excess ethanol, soak it ultrasonically at 45 Hz for 4 hours, then take it out and let it dry naturally in the air. Finally, put the naturally dried fungus in a freeze-drying device to further remove the residual moisture inside the fungus. The freeze-drying temperature is minus 50°C and the freezing time is 48 hours. Put the freeze-dried fungus in a pulverizer for crushing and powdering, and pass through a 200-mesh sieve to obtain the fungus biomass powder. Put the powder in a corundum crucible, the volume of the powder is about one-fifth of the volume of the crucible, and then heat-treat it at 300°C for 1 hour in a nitrogen atmosphere, cool to room temperature and take it out to obtain pre-carbonized fungus. The pre-carbonized fungus ...

Embodiment 2

[0047] Wild fungus fungus was collected, and the collected fungus was ultrasonically soaked in deionized water for 18 hours, and the deionized water was replaced every 2 hours until the cleaning was completed. Put the ultrasonically cleaned fungus in excess ethanol, soak in 45 Hz ultrasonic for 5 hours, take it out and let it dry naturally in the air. Finally, put the naturally dried fungus in a freeze-drying device to further remove the residual moisture inside the fungus. The freeze-drying temperature is minus 50°C and the freezing time is 60 hours. Put the freeze-dried fungus in a pulverizer for crushing and powdering, and pass through a 200-mesh sieve to obtain the fungus biomass powder. Put the powder in a corundum crucible, the volume of the powder is about one-fifth of the volume of the crucible, then heat-treat at 350°C for 1.5 hours under a nitrogen atmosphere, cool to room temperature and take it out to obtain pre-carbonized fungus. The pre-carbonized fungus prepare...

Embodiment 3

[0050] Collect the wild fungus fungus, soak the collected fungus in deionized water at 45 Hz ultrasonic for 24 hours, and change the deionized water every 2 hours until the cleaning is completed. Put the ultrasonically cleaned fungus in ethanol, soak in ultrasonic for 6 hours, take it out and let it dry naturally in the air. Finally, put the naturally dried fungus in a freeze-drying device to further remove the residual moisture inside the fungus. The freeze-drying temperature is minus 50°C and the freezing time is 72 hours. Put the freeze-dried fungus in a pulverizer for crushing and powdering, and pass through a 200-mesh sieve to obtain the fungus biomass powder. The powder is placed in a corundum crucible, the volume of which is about one-fifth of the volume of the crucible, and then heat-treated at 400°C for 2 hours in a nitrogen atmosphere, cooled to room temperature and taken out to obtain pre-carbonized fungus. The pre-carbonized fungus prepared by the above steps was ...

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Abstract

The invention belongs to the technical field of electrocatalysis, and in particular relates to an efficient biomass carbon electrochemical oxygen reduction catalyst and a preparation method and application thereof. By taking agaric as a biomass raw material, the biomass carbon-based catalyst with good hydrophilicity is prepared by acid-boiling the biomass raw material by means of a carbonizing mode combining pre-carbonization and full carbonization. By taking the fungi agaric which is low in price, easily available and environment-friendly as the raw material, the demand on equipment is relatively low in the preparation process, the preparation flow is short, and the preparation method is simple to operate. The preparation method is environment-friendly in preparation process, free of waste discharge and quite beneficial to scale production, and has wide industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and specifically relates to an electrochemical oxygen reduction catalyst for transforming fungus fungus and its preparation method and application. Background technique [0002] With the further development of industrial technology, the continuous growth of population, the continuous deterioration of the environment caused by the burning of a large number of ores, and the increasingly sharp contradiction between energy consumption and supply, research and development of environmentally friendly new energy technologies have become the world's environmental protection A task that needs to be solved urgently in the field, it is imperative. [0003] Proton exchange membrane fuel cell is a kind of perfluorosulfonic acid resin polymer as electrolyte, hydrogen or reformed gas as fuel, and air or oxygen as oxidant, which converts the chemical energy of fuel into electrical energy quickly and eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/96H01M8/1016
CPCH01M4/8807H01M4/8825H01M4/90H01M4/96H01M8/1016Y02E60/50Y02P70/50
Inventor 梁汉璞王西龙陈国栋
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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