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Novel Nitrogen-doped bio-carbon-based porous electrocatalyst preparation method

An electrocatalyst and nitrogen doping technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of scarce resources and high price, and achieve the effect of improving hydrogen evolution ability, easy operation and high spatial structure

Inactive Publication Date: 2018-10-16
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among many new energy sources, hydrogen energy has attracted much attention as an efficient and clean energy source. The hydrogen evolution reaction of electrolyzed water is one of the efficient ways to produce hydrogen. Widely used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1): Remove the pulp and outer skin of grapefruit to obtain fresh grapefruit peel, and cut into 2*3cm pieces; control the temperature to boil at 80℃ to remove soluble substances;

[0019] 2): Put the grapefruit peel obtained by filtering and washing in step 1 into the reaction kettle, and control the water temperature to hydrothermally react at 140°C for 15 hours to obtain a black grapefruit peel hydrogel;

[0020] 3): Filter the gel obtained in step 2, wash with deionized water, and freeze-dry to obtain a precursor;

[0021] 4): Mix potassium hydroxide with the grapefruit peel powder obtained in step 3 at a ratio of 3:1, grind, put the mixed sample into a corundum crucible, and calcine in a tube furnace for 1 hour under an argon atmosphere. The temperature of the tube furnace is controlled at 500°C, and the heating rate is 1°C / min; after cooling, the calcined sample is ground again and washed with deionized water to a pH of 7; the washed product is filtered, and then put into ...

Embodiment 2

[0025] 1): Remove the pulp and outer skin of grapefruit to obtain fresh grapefruit skin, and cut into 2*3cm pieces; control the temperature to boil at 90℃ to remove soluble substances;

[0026] 2): Put the grapefruit peel obtained by filtering and washing in step 1 into the reaction kettle, and control the water temperature to hydrothermally react at 180°C for 18 hours to obtain a black grapefruit peel hydrogel;

[0027] 3): Filter the gel obtained in step 2, wash with deionized water, and freeze-dry to obtain a precursor;

[0028] 4): Mix potassium hydroxide with the grapefruit peel powder obtained in step 3 at a ratio of 3:1, grind, put the mixed sample into a corundum crucible, and calcine in a tube furnace for 1 hour under an argon atmosphere. The temperature of the tube furnace is controlled at 600°C, and the heating rate is 3°C / min; after cooling, the calcined sample is ground again and washed with deionized water to a pH of 7; the washed product is filtered, and then put into ...

Embodiment 3

[0032] 1): Remove the pulp and outer skin of grapefruit to obtain fresh grapefruit peel, and cut into 2*3cm pieces; control the temperature to boil at 100°C to remove soluble substances;

[0033] 2): Put the grapefruit peel obtained by filtering and washing in step 1 into the reaction kettle, and control the water temperature to hydrothermally react at 220°C for 20 hours to obtain a black grapefruit peel hydrogel;

[0034] 3): Filter the gel obtained in step 2, wash with deionized water, and freeze-dry to obtain a precursor;

[0035] 4): Mix potassium hydroxide with the grapefruit peel powder obtained in step 3 at a ratio of 3:1, grind, put the mixed sample into a corundum crucible, and calcine in a tube furnace for 2h under an argon atmosphere. The temperature of the tube furnace is controlled at 700°C, and the heating rate is 5°C / min; after cooling, the calcined sample is ground again and washed with deionized water to a pH of 7; the washed product is filtered, and then put into te...

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Abstract

The invention discloses a novel Nitrogen-doped bio-carbon-based porous electrocatalyst preparation method, and belongs to the field of electrocatalyst material. A shaddock peel is pretreated, a precursor is prepared, a metal source is doped after activation, and a nitrogen-containing porous bio-carbon material prepared through the shaddock peel is obtained after calcination. The method has the beneficial effects that the low-cost reproducible shaddock peel is selected as a raw material for preparing the catalyst, possible environment pollution caused by the shaddock peel is reduced, and the preparation cost of the electrocatalyst is effectively lowered; in addition, through a hydrothermal carbonization method, the high yield is reached while the spatial structure of the material can be effectively reserved, and the method has the advantages such as simple and convenient operation; doped metal elements help a lot in improving bio-carbon hydrogen evolution capacity, and porous carbon hasthe advantages of large superficial area and high stability and is one of promising electrocatalyst materials; and biomass is a biological material which is rich in organic matter and becomes a possible raw material for electrocatalysis due to a high heteroatom content.

Description

Technical field [0001] The invention relates to the field of electrocatalytic materials, in particular to a method for preparing a novel nitrogen-doped biological carbon-based porous electrocatalyst. Background technique [0002] The exhaustion of fossil fuels and the harsh ecological environment have stimulated the development of clean and sustainable energy devices. Among the many new energy sources, hydrogen energy has attracted much attention as an efficient and clean energy. The hydrogen evolution reaction of electrolyzed water is one of the efficient ways to prepare hydrogen. However, the platinum group noble metal catalysts with the best catalytic performance are difficult due to scarce resources and high prices. Widely used. [0003] Therefore, the development of low-cost, high-performance non-noble metal catalyst electrocatalytic hydrogen evolution catalyst is an important research direction in this field. Summary of the invention [0004] In order to solve the above tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/091Y02E60/36
Inventor 胡智文蒙均晶万军民彭志勤王秉
Owner ZHEJIANG SCI-TECH UNIV
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