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High-performance heterogeneous composite catalyst for electrocatalytic hydrogen evolution and preparation method thereof

A composite catalyst and electrocatalysis technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, electrodes, etc., can solve the problems of poor electrical conductivity, etc., and achieve the effects of improving hydrogen evolution performance, easy control of reaction conditions, and low cost

Inactive Publication Date: 2020-06-09
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to MoS 2 It is a semiconductor material with poor electrical conductivity

Method used

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  • High-performance heterogeneous composite catalyst for electrocatalytic hydrogen evolution and preparation method thereof
  • High-performance heterogeneous composite catalyst for electrocatalytic hydrogen evolution and preparation method thereof
  • High-performance heterogeneous composite catalyst for electrocatalytic hydrogen evolution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A MoS grown on carbon cloth 2 / CoS 2 / CoMoS 2.17 o 1.12 The preparation method of composite catalyst, its preparation method is as follows:

[0040] (1) Pre-treat the carbon cloth, place the carbon in concentrated nitric acid and soak it at room temperature for 30 minutes, then transfer it to the reaction kettle and heat it in water at 120°C for 30 minutes, then cool it to room temperature with the furnace, and take out the carbon cloth with an ultra-pure Wash with water.

[0041] (2) The carbon cloth in step (1) was ultrasonically cleaned in ultrapure water and ethanol for 30 min, respectively, and dried in an oven at 60°C for later use.

[0042] (3) Take thiourea, cobalt chloride, and ammonium molybdate tetrahydrate and dissolve them in 20 mL of ultrapure water with an electronic balance, control the (Co / Mo) molar ratio of cobalt chloride and ammonium molybdate to be 1, and The concentration in aqueous solution is 0.014mol / L, ammonium molybdate tetrahydrate ([(NH...

Embodiment 2

[0052] A MoS grown on carbon cloth 2 / CoS 2 / CoMoS 2.17 o 1.12 The preparation method of composite phase catalyst material, its preparation method is as follows:

[0053] (1) Pretreat the carbon cloth. The pretreatment step is to first place the carbon in concentrated nitric acid and soak it at room temperature for 30 minutes, then transfer it to the reaction kettle and heat it in water at 120°C for 30 minutes, and cool it to room temperature with the furnace. The cloth was taken out and washed with ultrapure water.

[0054] (2) The carbon cloth in step (1) was ultrasonically cleaned in ultrapure water and ethanol for 30 min, respectively, and dried in an oven at 60°C for later use.

[0055] (3) a takes by weighing thiourea with electronic balance, cobalt chloride, ammonium molybdate is dissolved in 20mL ultrapure water, and the control Co / Mo mol ratio is 1, and the concentration of cobalt chloride in aqueous solution is 0.014mol / L, The concentration of ammonium molybdate...

Embodiment 3

[0064] A method for preparing a heterogeneous composite catalyst material grown on carbon cloth, the preparation method is as follows:

[0065] (1) Pretreat the carbon cloth. The pretreatment step is to first place the carbon in concentrated nitric acid and soak it at room temperature for 30 minutes, then transfer it to the reaction kettle and heat it in water at 120°C for 30 minutes, and cool it to room temperature with the furnace. The cloth was taken out and washed with ultrapure water.

[0066] (2) The carbon cloth in step (1) was ultrasonically cleaned in ultrapure water and ethanol for 30 min, respectively, and dried in an oven at 60°C for later use.

[0067] (3) Use an electronic balance to weigh thiourea, cobalt chloride, and ammonium molybdate and dissolve them in 20 mL of ultrapure water, and control the Co / Mo molar ratio to 0.3-4:1 (0.3:1, 0.5:1, 2:1 , 4:1), the concentration of thiourea was 0.04mol / L, the concentration of ammonium molybdate was 0.002mol / L, and sti...

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Abstract

The invention relates to a high-performance catalyst for electrocatalytic hydrogen evolution and a preparation method thereof. The high-performance multi-phase composite catalyst for electrocatalytichydrogen evolution is MoS<2> / CoS<2> / CoMoS<2.17>O<1.12>, and contains MoS<2>, CoS<2> and CoMoS<2.17>O<1.12> phases; or the catalyst is CoS<2> / CoMoS<2.17>O<1.12>, and contains CoS<2> and CoMoS<2.17>O<1.12> phases. Ammonium molybdate, cobalt chloride and thiourea are used as precursors, and one-step hydrothermal temperature-controlled synthesis is performed to obtain the catalyst. The catalyst has the characteristics of good performance, low cost and the like, and the preparation method is simple in process, easy to control, high in repetition rate and suitable for popularization and application.

Description

technical field [0001] The invention discloses a preparation method of a high-performance electrocatalytic hydrogen evolution multiphase composite catalyst. Background technique [0002] The energy crisis and the increasingly serious environmental pollution force people to constantly search for clean and efficient alternative energy sources. Hydrogen, as a clean and efficient energy source, has attracted more attention. Among them, the hydrogen production technology by electrolysis of water is simple and harmless to the environment, so electrocatalytic hydrogen evolution (Hydrogen Evolution Reaction, HER) has received more attention and research. [0003] The focus of research on hydrogen production by electrolysis of water is how to reduce the overpotential of hydrogen evolution at the cathode and increase the current density, so as to reduce energy loss and obtain more hydrogen energy. Platinum and other noble metal catalysts have been recognized as the best electrode mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C25B1/04C25B11/06
CPCB01J27/0515C25B1/04C25B11/091B01J35/33Y02E60/36
Inventor 李小云付强王一龙连天陈丽华苏宝连
Owner WUHAN UNIV OF TECH
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