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Transition metal-nitrogen coordinated carbon gel electrocatalyst and its preparation method and application

A technology of transition metals and electrocatalysts, applied in the field of electrocatalysis, can solve the problems of easy sintering of metals, catalytic activity and selectivity, difficulties in large-scale production and preparation, and unclear active centers, etc., to achieve a clear chemical reaction mechanism and easy large-scale industrialization The effect of small changes in production and chemical structure

Active Publication Date: 2021-05-14
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the transition metal-nitrogen-doped structure is difficult to prepare for large-scale production due to the shortcomings of the active center is not clear enough, the metal is easy to sinter, and the catalytic activity and selectivity are not high enough.

Method used

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  • Transition metal-nitrogen coordinated carbon gel electrocatalyst and its preparation method and application
  • Transition metal-nitrogen coordinated carbon gel electrocatalyst and its preparation method and application
  • Transition metal-nitrogen coordinated carbon gel electrocatalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Preparation of nickel-nitrogen coordinated carbon gel electrocatalysts:

[0051] (1) Dissolve 0.72mmol powdered sodium hydroxide in 2ml deionized water to form a sodium hydroxide solution, add 0.36mmol powdered 2,2'-bipyridine-4,4'-dicarboxylic acid and dissolve it in the sodium hydroxide solution In, form carboxylate solution of organic matter; then add 0.12mmol NiCl 2 ·6H 2 O particles, sonicated for 10 minutes until completely dissolved to form a nickel-nitrogen coordinated organic monomer solution①;

[0052] (2) Dissolve 1.2 mmol of pyrrole in 1 ml of isopropanol to form a pyridine / isopropanol solution for subsequent use, and dissolve 1.2 mmol of ammonium persulfate in 1 ml of deionized water to form an aqueous solution of ammonium persulfate for subsequent use;

[0053] (3) Add the pyridine / isopropanol solution and ammonium persulfate aqueous solution prepared in step (2) to the nickel-nitrogen coordinated organic monomer solution ① in step (1), and keep the mixe...

Embodiment 6～8

[0062] According to the preparation process of Example 1, only the calcination temperature in step (5) was changed to 700°C, 800°C and 1000°C to obtain nickel-nitrogen coordinated carbon gel electrocatalysts at different calcination temperatures.

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Abstract

The invention relates to the technical field of electrocatalysis, and discloses a transition metal-nitrogen coordinated carbon gel electrocatalyst and its preparation method and application. The preparation method comprises steps: (1) dissolving pyridine carboxylic acid in an inorganic alkali solution, and then Add transition metal salt to form organic monomer solution; (2) add pyrrole solution and ammonium persulfate solution in turn, and polymerize at low temperature to form gel; (3) gel is washed, dried, roasted with nitrogen, and pickled , to obtain the carbon gel electrocatalyst of the present invention. The chemical reaction mechanism of the preparation method is relatively clear, the preparation method is simple to operate, and is easy for large-scale industrial production. The prepared catalyst has a clear coordination structure and is applied in the electrocatalysis of CO 2 The preparation of CO has the characteristics of high activity and high selectivity, and the Faradaic efficiency of CO can reach up to 96%.

Description

technical field [0001] The invention relates to the technical field of electrocatalysis, in particular to a transition metal-nitrogen coordinated carbon gel electrocatalyst and a preparation method and application thereof. Background technique [0002] In recent years, with the rapid consumption of fossil fuels, the human demand for energy is increasing, and the development of a clean and sustainable energy has become the development trend of future science and technology. Electroreduction of CO 2 Conversion technologies can not only mitigate the global 2 Environmental problems caused by excessive emissions can also be converted into carbon-based chemicals and liquid fuels with high added value, such as the generated C 1 Products include formic acid, CO, CH 4 etc.; C 2 Such products include ethanol, ethylene, etc. Among them, CO, as the raw material of synthesis gas, can not only be used to produce a variety of chemical products, but also can be used to prepare oil fuel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J23/755B01J35/10C25B1/23C25B1/50C25B11/091
CPCB01J27/24B01J23/755C25B1/00C25B11/091B01J35/33B01J35/23B01J35/61
Inventor 侯阳张怡凯杨彬李中坚雷乐成
Owner ZHEJIANG UNIV
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