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A kind of relic derived composite material and its preparation method and application

A composite material and state technology, applied in the field of electrocatalytic materials, can solve the problems of preparing electrocatalytic materials, etc., and achieve the effect of economical preparation method and excellent durability.

Active Publication Date: 2021-07-13
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional relic material technology only uses biological materials as templates to obtain micro-nano structures, and does not use existing biological components (such as natural metal porphyrins) as precursors to obtain electrocatalytic materials.

Method used

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  • A kind of relic derived composite material and its preparation method and application
  • A kind of relic derived composite material and its preparation method and application
  • A kind of relic derived composite material and its preparation method and application

Examples

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Embodiment 1

[0039] Co-N-C / CoO x A method for preparing a composite material derived from a relic, comprising the following steps:

[0040](1) Extract natural chloroplasts with spinach leaves as raw material: the leaves are broken, and the broken leaves are placed in an extract solution (0.4mol / L sucrose+0.05mol / L Tris-HCl[pH=7.6]+0.01mol / L NaCl (prepared with deionized water) in a mortar (add 20-30ml extract per 10g of leaves), quickly grind for 2-5min; filter the obtained green pasty substance with 3-5 layers of gauze, and get the filtrate; Centrifuge at 300×g for 3 minutes to remove mesophyll cell walls, residues, etc. Take the organelle-rich supernatant, then centrifuge at 1000×g for 5 minutes to remove the supernatant containing other organelles, and take the green sediment at the bottom of the centrifuge tube (chloroplast) and add the extract to suspend the chloroplast, repeat the above differential centrifugation process 3 times to obtain the purified chloroplast; finally, soak the...

Embodiment 2

[0046] Cu-N-C / CuO x A method for preparing a composite material derived from a relic, comprising the following steps:

[0047] (1) Extract natural chloroplasts with spinach leaves as raw material: the leaves are broken, and the broken leaves are placed in an extract solution (0.4mol / L sucrose+0.05mol / L Tris-HCl[pH=7.6]+0.01mol / L NaCl (prepared with deionized water) in a mortar (add 20-30ml extract per 10g of leaves), quickly grind for 2-5min; filter the obtained green pasty substance with 3-5 layers of gauze, and get the filtrate; Centrifuge at 300×g for 3 minutes, take the supernatant, then centrifuge at 1000×g for 5 minutes, remove the supernatant, take the green sediment (chloroplast) at the bottom of the centrifuge tube and add the extract to suspend the chloroplast, repeat the above differential centrifugation Process 3 times to obtain purified chloroplasts; finally, soak the purified chloroplasts in 2.5wt% glutaraldehyde phosphate buffer solution [pH=7.2] for 12-24 hour...

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Abstract

The invention discloses a state-derived composite material, which consists of a transition metal-nitrogen-carbon matrix and 20-80 wt% transition metal oxide nanoparticles to form a chloroplast-like spherical structure with a diameter of 200-500 nm. The preparation method of the relic-derived composite material is as follows: (1) after crushing the plant leaves, put them into the extract and grind them, filter them through gauze, and then use differential centrifugation to purify the chloroplasts, and then soak them in glutaraldehyde phosphate buffer to remove the chloroplasts. Fixing the microstructure of chloroplasts; (2) immersing the fixed chloroplasts in HCl aqueous solution and transition metal acetate methanol solution successively to obtain transition metal chlorophyll derivatives, which are centrifuged and then freeze-dried; (3) freeze-dried The dried chloroplasts are calcined in an inert gas atmosphere or under vacuum conditions to obtain the remains-derived composite material. The state-derived composite material of the invention has a stable and controllable micro-nano structure and can be applied as a fuel cell electrode catalyst.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, and in particular relates to a composite material derived from a state and its preparation method and application. Background technique [0002] As an important topic in the field of energy and environment, electrocatalysis plays a key role in many electrochemical devices. For example, the process of catalyzing the fuel oxidation reaction at the negative electrode and the oxygen reduction reaction at the positive electrode in the fuel cell, and the process of catalyzing the oxygen evolution at the anode and the cathode at the cathode in the water electrolyzer The process of hydrogen evolution reaction, etc. In order to improve the electrocatalytic efficiency, the research of high-performance electrocatalysts is the top priority. Taking the cathode process of fuel cells—oxygen reduction reaction (ORR) as an example, the complex reaction path directly restricts the efficiency of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90
CPCH01M4/9008Y02E60/50
Inventor 郭兴梅巩毓泽钱程史汝华张威
Owner JIANGSU UNIV OF SCI & TECH
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