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Hydrogen evolution electrocatalytic material and preparation method and application thereof

An electrocatalytic material and a technology for catalytic materials, applied in the field of hydrogen evolution electrocatalytic materials and their preparation, can solve the problems of small specific surface area of ​​composite materials, agglomeration of metal nanoparticles, lack of confinement and immobilization, etc. High specific surface area, the effect of promoting electron conduction

Active Publication Date: 2020-11-20
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, high-temperature pyrolysis of precursors composed of noble metal ions and carbon sources is a common method for preparing metal / carbon nanocomposites, but due to the lack of effective confinement and immobilization between noble metal ions and carbon sources, high-temperature pyrolysis often leads to The obtained composite materials have problems such as small specific surface area and serious agglomeration of metal nanoparticles.

Method used

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  • Hydrogen evolution electrocatalytic material and preparation method and application thereof
  • Hydrogen evolution electrocatalytic material and preparation method and application thereof
  • Hydrogen evolution electrocatalytic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Preparation of polystyrene (PS) sphere template: Monodisperse polystyrene spheres were synthesized by emulsion polymerization. Ultrapure water (1100ml, 18MΩcm -2 @25°C) and styrene (13 mL) were added to a three-neck round bottom flask (500 mL). The mixture was stirred at a speed of 600 rpm while heating to 70 °C, and was blown with nitrogen at 60 mL min -1 The flow rate of purge. After keeping the mixture at 70 °C for 30 min, K 2 S 2 o 8 (0.3g), and the reaction was continued for 24 hours. The obtained polystyrene spheres were centrifuged at a speed of 4000 rpm to remove large aggregates at the bottom, and the upper emulsion was recovered and dried overnight at 60° C. to obtain a three-dimensionally ordered PS template.

[0052] (2) The PS template (2.0 g) prepared in step (1) was immersed in the Zn(NO 3 ) 2 ·6H 2 O (0.029g / mL), 2-methylimidazole (0.024g / mL) and 0.080g RuCl 3 ·xH 2 O in methanol solution (22.5 mL) for 1 h, degassed in vacuum for 10 min, a...

Embodiment 2

[0054] (1) The preparation of the polystyrene (PS) spherical template is the same as that in the step (1) of Example 1.

[0055] (2) The PS template (2.0 g) prepared in step (1) was immersed in the Zn(NO 3 ) 2 ·6H 2 O (0.029g / mL) and 2-methylimidazole (0.024g / mL) in a methanol solution (22.5mL) for 1 hour, vacuum degassed for 10 minutes, and then the impregnated template was removed and placed at 50 °C Dry under vacuum for 6 hours. Then dip the dried template into CH 3 OH / NH 3 ·H 2 O mixed solution (1:1=v / v), vacuum degassed for 10 minutes and then stood at room temperature for 24 hours, the product was filtered off and dried at room temperature. Then the product was immersed in tetrahydrofuran to etch the PS template, and the light brown powder was filtered out and dried overnight at 110°C. Finally, the light brown powder product was placed in a porcelain boat, heated to 950 °C at a heating rate of 2 °C / min, kept for 1 h, and then naturally cooled to room temperature t...

Embodiment 3

[0057] Mix 6.5g 2-methylimidazole and 0.08g RuCl under vigorous stirring 3 ·xH 2 O was dissolved in 80 mL of methanol solution. Then add 3g Zn(NO 3 ) 2 ·6H 2 O in 40 mL of methanol, stirred vigorously for 24 hours. The obtained product was separated by centrifugation, washed several times with methanol, and dried under vacuum at 60°C overnight. Finally, the product was placed in a porcelain boat, heated to 950 °C at a heating rate of 2 °C / min, and kept for 1 h, and then naturally cooled to room temperature to obtain a Ru loading of 1.5 wt % and a nitrogen doping amount of 6.6 at % hydrogen evolution electrocatalytic materials. The whole process was carried out in an Ar atmosphere, and the flow rate of the Ar gas was controlled at 25 mL / min.

[0058] In the hydrogen evolution electrocatalytic material obtained in this example, Ru nanoparticles are supported in a nitrogen-doped carbon framework obtained by high-temperature carbonization of a rhombohedral microporous ZIF-8...

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Abstract

The invention provides a hydrogen evolution electrocatalytic material as well as a preparation method and application thereof. The hydrogen evolution electrocatalytic material contains ultrafine ruthenium nanoparticles with the metal loading capacity of 0.05-5wt% and a nitrogen-doped carbon skeleton with the nitrogen doping capacity of 1.0-10.0 at%, wherein the ultrafine ruthenium nanoparticles are uniformly loaded in the nitrogen-doped carbon skeleton, and the nitrogen-doped carbon skeleton contains a nitrogen element, a carbon element and an oxygen element. The hydrogen evolution electrocatalytic material provided by the invention can catalyze water electrolysis hydrogen evolution reaction, and can ensure the stability of the catalyst material while realizing efficient electrocatalytic hydrogen evolution.

Description

technical field [0001] The invention belongs to the field of electrochemistry, in particular to a hydrogen evolution electrocatalytic material and its preparation method and application. Background technique [0002] In recent years, the massive consumption of fossil fuels has led to serious energy and environmental crises. With the increasingly serious problems of energy shortage, greenhouse effect and environmental pollution, exploring new renewable green energy has become one of the important topics in the field of energy and materials research. Among all energy resources, hydrogen is considered to be one of the most promising alternatives to traditional fossil fuels due to its advantages such as high energy density and no pollution to the environment. The electrolytic water hydrogen evolution reaction uses renewable electric energy to decompose the abundant water resources on the earth to produce hydrogen. It is a hydrogen production technology with great application pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C25B11/06C25B1/04
CPCB01J27/24C25B11/04C25B1/04B01J35/33B01J35/60Y02E60/36
Inventor 朱起龙吴昱霖李晓芳林华
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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