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Spiral Mo2C catalyst with ultralow platinum loading capacity, and preparation method and application thereof

A helical and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as performance and stability gaps, achieve improved hydrogen evolution performance, reduce platinum loading, The effect of the simple process of the preparation method

Active Publication Date: 2019-08-16
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a big gap between the performance and stability of molybdenum carbide catalysts and platinum-based catalysts in the current research field.

Method used

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  • Spiral Mo2C catalyst with ultralow platinum loading capacity, and preparation method and application thereof
  • Spiral Mo2C catalyst with ultralow platinum loading capacity, and preparation method and application thereof
  • Spiral Mo2C catalyst with ultralow platinum loading capacity, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This example provides a helical ultra-low platinum loading Mo that can be applied to electrolytic water hydrogen evolution reaction. 2 C catalyst, its preparation method is as follows.

[0054] (1) The purchased carbon cloth material is cut into a size of 1.0cm×2.0cm. Ultrasonic cleaning with 95% ethanol and deionized water, respectively, and drying for later use.

[0055] (2) Measure 150mL of ammonium molybdate solution with concentration of 10mmol / L as electrolyte, fix carbon cloth as working electrode with polytetrafluoroethylene electrode clip, immerse in ammonium molybdate electrolyte, carbon rod as counter electrode, Constitute a double-electrode electrolytic cell, adopt the method of constant current cathodic electrodeposition, at 4mA / cm 2 Under the current density, the electrodeposition time is 30min, and then the working electrode is washed with deionized water and dried to obtain the helical MoO 2 Precursor.

[0056] (3) The helical MoO prepared in step (2...

Embodiment 2

[0064] A helical ultra-low platinum loading Mo for hydrogen evolution reaction in water electrolysis 2 C catalyst, its preparation method is as follows.

[0065] (1) The carbon cloth material is cut into a size of 1.0cm×2.0cm. Ultrasonic cleaning with 95% ethanol and deionized water, respectively, and drying for later use.

[0066] (2) Measure 100 mL of ammonium molybdate solution with a concentration of 10 mmol / L as the electrolyte, fix the carbon cloth as a working electrode with a polytetrafluoroethylene electrode clip, immerse it in the ammonium molybdate electrolyte, and use the carbon rod as the counter electrode, Constitute a double-electrode electrolytic cell, adopt the method of constant current cathodic electrodeposition, at 6mA / cm 2 Under the current density, the electrodeposition time is 30min, and then the working electrode is washed and dried with deionized water to obtain helical MoO 2 Precursor.

[0067] (3) The helical MoO prepared in step 2) 2 Put the pr...

Embodiment 3

[0073] A helical ultra-low platinum loading Mo for hydrogen evolution reaction in water electrolysis 2 C catalyst, its preparation method is as follows.

[0074] (1) The carbon cloth material is cut into a size of 1.0cm×2.0cm. Ultrasonic cleaning with 95% ethanol and deionized water, respectively, and drying for later use.

[0075] (2) Measure 150 mL of ammonium molybdate solution with a concentration of 5 mmol / L as the electrolyte, fix the carbon cloth with a polytetrafluoroethylene electrode clip as the working electrode, immerse it in the ammonium molybdate electrolyte, and use the carbon paper as the counter electrode , constituting a double-electrode electrolytic cell, using constant current cathodic electrodeposition, at 4mA / cm 2 Under the current density, the electrodeposition time is 20min, and then the working electrode is washed and dried with deionized water to obtain helical MoO 2 Precursor.

[0076] (3) The helical MoO prepared in step (2) 2 Put the precursor...

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Abstract

The invention relates to a spiral Mo2C catalyst with an ultralow platinum loading capacity, and a preparation method and an application thereof. The preparation method comprises the following steps: S1, preparing a spiral MoO2 precursor by an electrodeposition technology; S2, preparing a spiral Mo2C catalyst by a chemical vapor deposition process; and S3, preparing the spiral Mo2C catalyst with the ultralow platinum loading capacity by an electroplating process. The spiral Mo2C catalyst with the ultralow platinum loading capacity avoids the agglomeration sintering phenomenon due to its spiralmorphology, has a high hydrogen evolution activity, and can directly participate in the electrolysis reaction of water as an integrated electrode. The preparation method of the invention has the advantages of simplicity, easiness in implementation, good repeatability, great reduction of the preparation cost of the hydrogen evolution catalyst, and great practical application values.

Description

technical field [0001] The invention belongs to the field of hydrogen production by electrocatalysis and electrolysis of water, in particular to a helical ultra-low platinum loading Mo 2 C catalyst and its preparation method and application. Background technique [0002] Due to the massive consumption of fossil energy in the world in recent years and the resulting climate change problem has become increasingly severe, the development and utilization of sustainable new energy has been paid more and more attention by the society. Among them, hydrogen fuel cell is a rising star in the field of new energy in the future due to its advantages of high energy conversion efficiency, high energy density, high power, long power supply time, long service life and no harmful emissions. The anode reactant of fuel cells, hydrogen, has the characteristics of high energy density and environmental protection. It is one of the key points in the development of new energy fields in the future. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J35/10C25B1/04C25B11/06
CPCB01J27/22C25B1/04C25B11/04B01J35/33B01J35/61Y02E60/36
Inventor 宋树芹饶学凯王毅
Owner SUN YAT SEN UNIV
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