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Preparation method for MoS2/CC (molybdenum disulfide/carbon cloth) composite hydrogen evolution electro-catalytic material

An electrocatalytic material, molybdenum disulfide technology, which is applied in the field of electrocatalytic hydrogen evolution to achieve the effects of small nanometer size, uniform distribution and wide interlayer spacing

Inactive Publication Date: 2017-12-08
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No studies have reported MoS 2 Electrocatalytic hydrogen evolution at full pH over a base catalyst

Method used

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  • Preparation method for MoS2/CC (molybdenum disulfide/carbon cloth) composite hydrogen evolution electro-catalytic material
  • Preparation method for MoS2/CC (molybdenum disulfide/carbon cloth) composite hydrogen evolution electro-catalytic material
  • Preparation method for MoS2/CC (molybdenum disulfide/carbon cloth) composite hydrogen evolution electro-catalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 2

[0014] The preparation of embodiment 1 molybdenum disulfide / carbon cloth composite catalyst

[0015] Weigh 582.7mg of phosphomolybdic acid and 1165.3mg of thiourea and dissolve them in 46ml of deionized water and stir for 1-2 hours to obtain a mixed solution, then take 4ml, 6ml, 12ml, 24ml respectively (marked as MoS 2 / CC-1,MoS 2 / CC-2,MoS 2 / CC-3,MoS 2 / CC-4) solution was transferred to a 50ml reaction kettle, and then diluted to 30ml respectively. Put the carbon in the solution and ultrasonically make the solution completely wet the carbon cloth, heat it in water at 180 degrees Celsius for 24 hours, then cool it down to room temperature naturally, wash the obtained product with deionized water and ethanol in turn, filter it, and place it in a vacuum drying oven Dry at 60°C for 8 hours.

Embodiment 2

[0016] Example 2 MoS 2 Characterization and Analysis of / CC Composite Catalyst

[0017] like figure 1 As shown, it can be seen from the figure that there is MoS 2 and the diffraction peaks of carbon cloth, without other impurity phases, and MoS 2 The peak corresponding to the (002) crystal plane shifted to 9.8°, indicating that the interlayer spacing of the molybdenum disulfide we obtained was widened.

[0018] like figure 2 As shown, it can be seen from Figures a and b that molybdenum disulfide is evenly grown on the carbon cloth. Figure d shows that the molybdenum disulfide nanosheets are about 100-150nm. Figure e shows that molybdenum disulfide is rich in many defects, and the inlay shows that the interlayer spacing is about 0.75-0.82nm wide.

[0019] like image 3 As shown, the MoS can be clearly seen in the figure 2 The / CC composite electrocatalyst has excellent electrocatalytic hydrogen evolution performance in acidic environment. MoS 2 / CC-3 has the highest e...

Embodiment 3

[0021] Example 3 MoS 2 Electrocatalytic Hydrogen Evolution Activity Experiment of / CC Composite Catalyst

[0022] Using a three-electrode system for MoS 2 The electrocatalytic hydrogen evolution performance of the / CC composite hydrogen evolution electrocatalytic material was tested. The graphite rod was used as the counter electrode, the saturated calomel electrode (SCE) was used as the reference electrode, and the catalyst was used as the working electrode; the test instrument was Shanghai Chenhua CHI 760e electrochemical Workstation; the test solution is 0.5mol / L H 2 SO 4 Solution, 0.5mol / L sodium phosphate buffer solution, 1mol / L KOH solution.

[0023] Test parameters: LSV test scan rate 5mV / s.

[0024] The electrocatalytic hydrogen evolution performance test results of the composite electrocatalytic hydrogen evolution material of the present invention in acid are as follows: image 3 Medium, MoS 2 / CC-3 composite electrocatalytic hydrogen evolution material has the ...

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Abstract

The invention belongs to the field of electro-catalytic hydrogen evolution, and particularly relates to a preparation method for a MoS2 / CC (molybdenum disulfide / carbon cloth) composite hydrogen evolution electro-catalytic material. The preparation method comprises the following steps: washing and drying CC cut into regular shapes, placing the CC in a mixed solution of phosphomolybdic acid and thiourea, performing ultrasonic treatment to completely soak the CC in the mixed solution, then transferring the CC and the mixed solution into a reaction kettle, performing hydrothermal reaction for 24 hours under the condition of 180 DEG C, performing natural cooling to room temperature, and performing washing, centrifugation and drying to obtain an MoS2 / CC composite catalyst. Prepared MoS2 grows on the CC, and is uniformly distributed; and compared with MoS2 prepared by a conventional synthesis method, the prepared MoS2 is small in nanometric size, rich in defect and large in interlayer spacing, and the electro-catalytic hydrogen evolution activity is further improved.

Description

technical field [0001] The invention belongs to the field of electrocatalytic hydrogen evolution, in particular to a method for preparing a molybdenum disulfide / carbon cloth composite hydrogen evolution electrocatalytic material. technical background [0002] As the global energy and environmental crisis intensifies, hydrogen production by electrolysis of water is an effective way to replace traditional fossil fuels to effectively solve the growing energy crisis and environmental pollution. However, efficient electrocatalysts are required for the hydrogen evolution reaction (HER) to deliver high currents at low potentials. Pt group metals are well known as the most popular electrocatalytic materials for the hydrogen evolution reaction. However, their high cost and rare reserves limit their applications. Therefore, the development of efficient and inexpensive novel electrocatalysts for water splitting is significant but challenging. Recently, two-dimensional (2D) layered t...

Claims

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Application Information

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IPC IPC(8): B01J27/051C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/051B01J35/33Y02E60/36
Inventor 毛宝东王勃刘艳红谭丽丽余芙荣张科伟杨亚林
Owner JIANGSU UNIV
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