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Lignin-based bimetallic functionalized carbon material as well as preparation method and application thereof

A lignin-based, bimetallic technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of low metal content, long preparation time, and few active sites in the product, and achieve the goal of preparation The effect of short time, improved water solubility, and uniform metal distribution

Active Publication Date: 2020-12-08
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent (CN109012590A) discloses a preparation method of a lignin-based transition metal-nitrogen-doped carbon material, which uses a carboxyl-containing carbon skeleton material Lignin is mixed with metal salts and then subjected to hydrothermal method and high-temperature calcination to obtain products, but the obtained products have lower metal content, fewer active sites, and longer preparation time

Method used

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  • Lignin-based bimetallic functionalized carbon material as well as preparation method and application thereof
  • Lignin-based bimetallic functionalized carbon material as well as preparation method and application thereof
  • Lignin-based bimetallic functionalized carbon material as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0040] A preparation method of a lignin-based bimetallic functionalized carbon material, comprising the following steps:

[0041] S1. Weigh the mass of each substance according to the mass ratio of EHL-COOH, ferric chloride, and cobalt nitrate as 2:1:3. Dissolve EHL-COOH in 100mL pure water, then dissolve ferric chloride hexahydrate and cobalt nitrate hexahydrate in 50mL pure water, stir evenly with a magnetic force, and add dropwise into EHL-COOH aqueous solution, stir for 10min, measure the mixed solution pH. Adjust the pH of the mixed solution with ammonia water and hydrochloric acid to make it 8.5, let it stand for 12 hours, filter and wash the precipitate, centrifuge, dry the sample in an oven for 24 hours, take it out, weigh it, and obtain the metal-lignin-based supramolecular precursor, named EHL -COOH-Fe / Co.

[0042] S2. Take EHL-COOH-Fe / Co and urea with a mass ratio of 1:1 and grind and mix them evenly. Carry out high-temperature carbonization to 700°C under an Ar a...

Embodiment 2-10

[0044] The preparation method of Examples 2-10 is consistent with the preparation method of Example 1, except that the raw material content and parameters are different, and the specific raw materials and parameters are shown in Table 1.

[0045]Raw material and parameter setting of table 1 embodiment 2-10

[0046]

[0047]

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Abstract

The invention belongs to the technical field of biomass materials and discloses a lignin-based bimetallic functionalized carbon material as well as a preparation method and application thereof. The invention provides the preparation method of the lignin-based metal functionalized carbon material. The method carrying out carboxylation modification on lignin, coordinating with transition metal to form a metal carboxylated lignin-based supramolecular precursor, co-doping with nonmetal heteroatoms, and carrying out high-temperature carbonization. The method comprises the following steps: S1, coordinating and combining carboxylated lignin with an iron and cobalt metal salt solution to obtain a bimetal carboxylated lignin-based supramolecular precursor; and S2, carrying out non-metal doping andhigh-temperature carbonization treatment on the metal lignin-based supramolecular precursor to obtain the modified lignin-based metal functionalized carbon material. An electrocatalytic oxygen evolution electrode prepared from the carboxylated lignin-based metal functionalized carbon material prepared by the preparation method disclosed by the invention shows excellent catalytic activity.

Description

technical field [0001] The present invention relates to the technical field of biomass materials, more specifically, to a lignin-based bimetallic functionalized carbon material and its preparation method and application. Background technique [0002] Efficient catalysts for electrocatalytic hydrogen production are mainly noble metals and their oxides, such as Pt, Ir, Ru, IrO 2 , RuO 2 etc., but their scarcity and high cost limit their widespread use. Therefore, it is urgent to research and develop catalysts with abundant resources, low price, excellent catalytic activity and stability. Although the oxygen evolution performance of transition metals such as iron, cobalt, nickel, and manganese is not as good as that of noble metals, they are widely distributed, cheaper, and more stable than noble metals, and have gradually become potential alternatives for noble metals. Bimetallic catalysts The synergistic effect of the electrocatalytic application has superior properties th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08C25B1/04C25B11/06
CPCB01J27/24B01J37/084B01J37/086C25B1/04B01J35/33Y02E60/36
Inventor 林绪亮吴林军邱学青秦延林王铁军方岩雄
Owner GUANGDONG UNIV OF TECH
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