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A kind of cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst and its preparation method and application

A nanocomposite and electrocatalyst technology, applied in circuits, electrical components, battery electrodes, etc., to achieve good methanol tolerance, easy mass production, and abundant resources

Active Publication Date: 2019-03-26
安徽伏碳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some achievements have been made in the preparation of porous carbon nanomaterials using MOF as a precursor, cobalt-carbon porous nanocomposites (Co / NPCC), and the report on its ORR electrocatalytic performance

Method used

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  • A kind of cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst and its preparation method and application
  • A kind of cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst and its preparation method and application
  • A kind of cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (a) Preparation of MOF compound [Co(O-BDC)(bbp)]

[0029] 0.120g cobalt chloride hexahydrate (0.5mmol), 0.137g 1,3-dibenzimidazolyl propane (0.5mmol), 0.092g hydroxyisophthalic acid (0.5mmol) and 0.060g sodium hydroxide (1.5mmol ) into a polytetrafluoroethylene-lined stainless steel reactor containing 10 mL of deionized water, sealed the lid, and reacted hydrothermally at 160 °C for 72 h, cooled to room temperature, filtered, washed and dried to obtain a pink MOF compound [Co(O -BDC)(bbp);

[0030] (b) Preparation of cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst Co / NPCC

[0031] Grind the MOF compound [Co(O-BDC)(bbp)] obtained in step (a) into powder, take a certain amount and place it in a porcelain boat in a tube furnace at a rate of 5°C / min under a nitrogen atmosphere Heating, first raised to 250°C for 2 hours, then heated to 500°C for 4 hours to obtain the cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst Co / NPCC with a spec...

Embodiment 2

[0033] (a) Preparation of Co-MOF

[0034] Prepare according to the method and conditions of step (a) in Example 1.

[0035] (b) Preparation of cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst Co / NPCC

[0036] Grind the MOF compound [Co(O-BDC)(bbp)] obtained in step (a) into powder, take a certain amount and place it in a porcelain boat in a tube furnace at a rate of 5°C / min under a nitrogen atmosphere Heating, first raised to 250°C for 2 hours, then heated to 600°C for 4 hours to obtain the cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst Co / NPCC with a specific surface area of ​​162.27m 2 / g.

Embodiment 3

[0038] (a) Preparation of Co-MOF

[0039] Prepare according to the method and conditions of step (a) in Example 1.

[0040] (b) Preparation of cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst Co / NPCC

[0041]Grind the MOF compound [Co(O-BDC)(bbp)] obtained in step (a) into powder, take a certain amount and place it in a porcelain boat in a tube furnace at a rate of 5°C / min under a nitrogen atmosphere Heating, first raised to 250°C for 2 hours, then heated to 700°C for 4 hours to obtain the cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst Co / NPCC with a specific surface area of ​​123.63m 2 / g.

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Abstract

The invention discloses a metal organic skeleton compound-based cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst and its preparation method and application. The cobalt-carbon porous nanocomposite oxygen reduction electrocatalyst is prepared from a metal organic skeleton compound [Co(O-BDC)(bbp)] as a precursor through high-temperature calcination. The carbon material has a porous structure. A cobalt element is uniformly supported on the carbon material. The oxygen reduction electrocatalyst has high electrical conductivity and a large specific surface area and effectively reduces the overpotential of oxygen reduction. Through a rotating disk electrode and a rotating ring electrode, it is proved that the oxygen reduction process is an ideal 4 electron oxygen reduction catalytic process. The electrocatalyst fully performs synergism of cobalt and a carbon material in electrocatalysis and has great theoretical and practical significance for the development of novel electrochemical catalysts and energy conversion and storage devices.

Description

Technical field: [0001] The invention belongs to the field of new energy material technology and electrochemical catalysis, and specifically relates to a cobalt-carbon porous nanocomposite material catalyst; and also relates to a preparation method of the catalyst and its electrocatalytic application in the cathode oxygen reduction reaction of a fuel cell. Background technique: [0002] With the increasing demand for clean and sustainable energy, scientists have devoted a lot of energy to the research and development of efficient, low-cost and environmentally friendly energy conversion and storage systems. Among them, the oxygen reduction reaction (ORR) is a common cathode reaction in fuel cells and metal-air batteries. Considering the activity and stability of the catalyst, the catalysts used for the ORR reaction mainly include Pt and its alloys, but these noble metals are found in nature. Very rare and expensive, the promotion of fuel cells has been greatly hindered. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88H01M4/96
CPCH01M4/8652H01M4/88H01M4/9041H01M4/96Y02E60/50
Inventor 詹天荣芦思思温永红
Owner 安徽伏碳科技有限公司
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