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Carbon-based composite electrocatalyst, preparation method and applications thereof

An electrocatalyst and catalyst technology, applied in the field of electrocatalysis, can solve the problems of unsuitable industrial application, poor catalyst stability, easy deactivation, etc., and achieve the effects of strong repeatability, short reaction time and simple steps.

Active Publication Date: 2020-02-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these catalysts face disadvantages such as poor stability and easy deactivation, and are also not suitable for practical industrial applications.

Method used

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  • Carbon-based composite electrocatalyst, preparation method and applications thereof
  • Carbon-based composite electrocatalyst, preparation method and applications thereof
  • Carbon-based composite electrocatalyst, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] NF is the preparation of 20%Ru / NC nanosheets (meaning that Ru accounts for 20% of the total catalyst (NC+Ru) mass) of the substrate:

[0033] Weigh 0.5689g dopamine hydrochloride, 5.6763g FeCl 3 ·6H 2 O was thoroughly ground in a mortar, and the complex was transferred to a magnetic boat, placed in a temperature-raising tube furnace with automatic temperature control, and heated to 700 °C at a heating rate of 5 °C / min for calcination for 2 h; after natural cooling to room temperature Finally, take it out, pickle with 1M HCl until there is no elemental iron, transfer to a centrifuge tube for centrifugation, wash with water and alcohol several times, and obtain NC nanosheets.

[0034] Weigh 100 mg of the NC nanosheets prepared above in 65 mL of ethylene glycol solution, add 10 mL of RuCl 3 Ethylene glycol solution (5mg / mL) was ultrasonically dispersed, and refluxed at 190°C for 1h. After naturally cooling to room temperature, centrifuge, wash with water and alcohol sev...

Embodiment 2

[0036] The preparation method of this electrocatalytic material is basically the same as that of Example 1, the difference is that FeCl is not added 3 ·6H 2 O, without the pickling step, the material is named 20% Ru / bulk NC.

Embodiment 3

[0038] The preparation method of this electrocatalytic material is basically the same as that of Example 1, the difference is that: take 90 mg of NC nanosheets prepared in Example 1 in 71 mL of ethylene glycol solution, add 4 mL of RuCl 3 Ethylene glycol solution (5mg / mL), the material is named 10%Ru / NC nanosheets (meaning that Ru accounts for 10% of the mass of the total catalyst (NC+Ru)).

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PUM

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Abstract

The invention belongs to the field of electrocatalysts, and particularly relates to a preparation method and applications of a high-performance carbon-based composite catalyst for producing hydrogen by electrochemically decomposing water, wherein the Ru / NC electrocatalyst is obtained by using nitrogen-doped carbon (NC) synthesized through complexing, calcining and acid washing as a substrate material and using ethylene glycol as a reducing agent under a reflux condition. According to the invention, the electrocatalyst material has low charge transfer resistance and reaction barrier of hydrogenevolution reaction, and has excellent performance in electrocatalytic hydrogen evolution reactions; Ru has the lowest price in Pt series precious metal materials, so that the catalyst is low in cost;and the obtained catalyst is simple and convenient in experimental operation, simple in process and excellent in catalytic performance, and provides the basic application research for the materials in the field of electro-catalysis.

Description

technical field [0001] The invention belongs to the field of electrocatalysis, and in particular relates to a high-performance carbon-based composite electrocatalyst for electrochemically decomposing water to produce hydrogen, as well as its preparation method and application. [0002] technical background [0003] With the continuous consumption of fossil fuels, in order to meet today's huge energy demand, various new energy output plans have attracted extensive attention. As a clean energy without any pollution, hydrogen energy is expected to become the most effective substitute for fossil fuels. Electrochemical water splitting for hydrogen production (hydrogen evolution reaction, HER) has great application prospects in the development of chemical energy storage technology due to its high efficiency, environmental friendliness, high purity of hydrogen production, and strong adaptability to energy fluctuations. [0004] Pt-based catalysts are still the most efficient HER ca...

Claims

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Application Information

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IPC IPC(8): B01J27/24C25B1/04C25B11/06
CPCB01J27/24C25B1/04C25B11/093B01J35/33Y02E60/36
Inventor 陈敏高梦涵姜德立李娣孟素慈徐菁
Owner JIANGSU UNIV
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