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Ru-based hydrogen evolution catalyst, and preparation method and application thereof

A catalyst and hydrogen evolution technology, applied in the field of electrochemistry, to achieve the effects of simple process, less pollution to the environment, and simple post-treatment

Active Publication Date: 2019-08-23
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difficulties of environmental pressure and synthesis temperature, diruthenium triboride (Ru 2 B 3 ) materials have not been used in catalysis, therefore, the method of applying diruthenium triboride to hydrogen evolution catalyst has yet to be developed

Method used

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  • Ru-based hydrogen evolution catalyst, and preparation method and application thereof
  • Ru-based hydrogen evolution catalyst, and preparation method and application thereof
  • Ru-based hydrogen evolution catalyst, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A preparation method for a Ru-based hydrogen evolution catalyst, comprising the steps of:

[0039] 1) Mix 1.54mL phytic acid, 0.74mL aniline, and 3mL p-phenylenediamine (p-phenylenediamine is dissolved in water, the concentration is 10mg / mL, the same below) and mix and stir for 15min, add 8mL of 237.75mg / mL ammonium persulfate The aqueous solution was stirred evenly, and reacted in an ice-water bath at 0~5°C for 1 hour, transferred to the reactor, and reacted at 180°C for 3 hours. After the reaction was completed, it was naturally cooled to room temperature, washed and dried to obtain polyaniline fibers; 2) the step 1 ) The obtained polyaniline fibers were heated to 750°C under an inert atmosphere, kept at a temperature of 4 hours, and then naturally cooled to room temperature. The obtained black product was nitrogen-containing carbon fibers in the form of nano-networks;

[0040] 3) Take the mass ratio of nitrogen-containing carbon fiber, melamine, boric acid and ruthen...

Embodiment 2

[0052] A preparation method for a Ru-based hydrogen evolution catalyst, comprising the steps of:

[0053] 1) Mix and stir 1.54mL phytic acid, 0.74mL aniline, and 3mL p-phenylenediamine (10mg / mL) for 15min, add 8mL of 237.75mg / mL ammonium persulfate aqueous solution and stir evenly, react in an ice-water bath at 0~5℃ for 1h, transfer Put it into the reaction kettle and react at 180°C for 3 hours. After the reaction, naturally cool to room temperature, wash and dry to obtain polyaniline fibers;

[0054] 2) Heat the dried product obtained in step 1 to 750°C under an inert atmosphere, keep it warm for 4 hours, and then cool it down to room temperature naturally. The obtained black product is nitrogen-containing carbon fiber in the form of a nano-network;

[0055] 3) The mass ratio of nitrogen-containing carbon fiber, melamine, boric acid and ruthenium chloride obtained in step 2) is 3:4:2:1, stirred at room temperature for 5 hours to form a suspension, and the obtained suspension ...

Embodiment 3

[0058] The difference between embodiment 3 and embodiment 2 is that in step 3), the mass ratio of nitrogen-containing carbon fiber, melamine, boric acid and ruthenium chloride is 3:4:6:1.

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Abstract

The present invention provides a Ru-based hydrogen evolution catalyst, and a preparation method and an application thereof. The preparation method comprises the following steps: 1) heating a polyaniline fiber to 700-1100 DEG C in an inert atmosphere, and maintaining the temperature for 3-5 h to obtain a black product which is a nitrogen-containing carbon fiber; and 2) dispersing the nitrogen-containing carbon fiber obtained in step 1), melamine and ruthenium chloride in an aqueous solution of boric acid to obtain a suspension, drying the suspension, heating the dried product to 500-800 DEG C under the inert atmosphere, and keeping the temperature for 2-4 h to obtain a black powder that is the Ru-based hydrogen evolution catalyst, wherein a mass ratio of the nitrogen-containing carbon fiberto melamine to boric acid to ruthenium chloride is (2-4):(2-6):(2-6):1. B-and-N-doped carbon nanofibers are used to effectively disperse Ru2B3 nanoparticles, and the catalyst has an excellent hydrogen evolution performance in the whole pH range.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a Ru-based hydrogen evolution catalyst and a preparation method and application thereof. Background technique [0002] Hydrogen (H 2 ) is one of the most attractive clean energy sources with excellent energy storage and conversion properties. To achieve efficient water splitting, it is urgent to find effective HER (hydrogen evolution) catalysts. Although the Pt-based catalyst has the best comprehensive catalytic performance, it can greatly reduce the energy barrier of the electrochemical process and accelerate the H + to H 2 the electrochemical reaction rate. However, for large-scale hydrogen production, precious metals are scarce resources and the cost is high. On the other hand, considering the inevitable changes in proton concentration in the process, the ideal catalyst requires good work under general pH conditions, so that Make the water splitting p...

Claims

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Application Information

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IPC IPC(8): B01J27/24C25B1/04C25B11/06B01J35/06
CPCB01J27/24C25B1/04C25B11/04B01J35/33B01J35/58Y02E60/36
Inventor 张佳楠乔越洋程永程俊淇许群
Owner ZHENGZHOU UNIV
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