Molybdenum carbide/carbon nano hydrogen production catalyst synthesized by utilizing ink

A catalyst and molybdenum carbide technology, which is applied in physical/chemical process catalysts, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as poor electrocatalytic conductivity, limited electrocatalytic hydrogen production capacity, difficulties, etc. Inexpensive, excellent electrocatalytic hydrogen production activity and stability, and the effect of promoting transfer

Active Publication Date: 2020-11-10
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many studies have been carried out to improve the hydrogen production capacity of molybdenum carbide electrocatalysts, it is still very difficult to achieve controllable synthesis of highly dispersed porous molybdenum carbide nano-electrocatalysts at higher carbonization temperatures.
In addition, the intrinsic electrocatalytic conductivity of molybdenum carbide is poor, which also limits the improvement of its electrocatalytic hydrogen production capacity.

Method used

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  • Molybdenum carbide/carbon nano hydrogen production catalyst synthesized by utilizing ink
  • Molybdenum carbide/carbon nano hydrogen production catalyst synthesized by utilizing ink
  • Molybdenum carbide/carbon nano hydrogen production catalyst synthesized by utilizing ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] At 80 °C, 1.87 g of didecyldimethylammonium bromide and 1.5 g of ink were dispersed in 50 mL of deionized water. Then, in the state of magnetic stirring, 30 g of ammonium molybdate solution with a mass concentration of 2.4% was added dropwise thereto, and reacted at 80° C. for 24 h. After the reaction, the hybrid precursor MoO was obtained by centrifugal drying. x / DDA / CI.

[0038] Put the above precursor in a tube furnace under the protection of argon atmosphere, raise the temperature to 750°C, keep the temperature constant for 5 hours, and control the heating rate at 5°C / min, you can get 3D hierarchical porous structure molybdenum carbide / carbon nanometer electrocatalytic hydrogen production catalyst. Such as figure 1 As shown: the catalyst as a whole presents a three-dimensional hierarchical porous structure, and its structure is composed of molybdenum carbide nanoparticles and carbon nanoparticles intersecting, and the particle size of the active center molybdenu...

Embodiment 2

[0044] At 80 °C, 1.87 g of didecyldimethylammonium bromide and 0 g of ink were dispersed in 50 mL of deionized water. Then, in the state of magnetic stirring, 30 g of ammonium molybdate solution with a mass concentration of 2.4% was added dropwise thereto, and reacted at 80° C. for 24 h. After the reaction, the hybrid precursor MoO was obtained by centrifugal drying. x / DDA / CI.

[0045] Put the above precursor in a tube furnace under the protection of argon atmosphere, raise the temperature to 750°C, keep the temperature constant for 5 hours, and control the heating rate at 5°C / min, you can get 3D hierarchical porous structure molybdenum carbide / carbon nanometer electrocatalytic hydrogen production catalyst.

[0046] The electrochemical test of the prepared 3D hierarchical porous structure molybdenum carbide / carbon nanometer electrocatalytic hydrogen production catalyst is the same as the steps (a) and (b) of the implementation case 1.

[0047] The catalyst exhibits high hy...

Embodiment 3

[0049] At 80 °C, 1.87 g of didecyldimethylammonium bromide and 0.5 g of ink were dispersed in 50 ml of deionized water. Then, in the state of magnetic stirring, 30 g of ammonium molybdate solution with a mass concentration of 2.4% was added dropwise thereto, and reacted at 80° C. for 24 h. After the reaction, the hybrid precursor MoO was obtained by centrifugal drying. x / DDA / CI.

[0050] Put the above precursor in a tube furnace under the protection of argon atmosphere, raise the temperature to 750°C, keep the temperature constant for 5 hours, and control the heating rate at 5°C / min, you can get 3D hierarchical porous structure molybdenum carbide / carbon nanometer electrocatalytic hydrogen production catalyst.

[0051] The electrochemical test of the prepared 3D hierarchical porous structure molybdenum carbide / carbon nanometer electrocatalytic hydrogen production catalyst is the same as the steps (a) and (b) of the implementation case 1.

[0052] The catalyst exhibits high ...

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Abstract

The invention discloses an ink-assisted synthesized molybdenum carbide / carbon nano electro-catalytic hydrogen production catalyst with a 3D hierarchical porous structure, which is characterized by comprising molybdenum carbide nano-particles and carbon nano-particles, wherein the molybdenum carbide nano-particles and the carbon nano-particles are crossed, and the molybdenum carbide nano-particlesare located in the active center of the catalyst. The carbon nanoparticles are derived from ink, have a graphitization-like structure, carry negative charges and have a three-dimensional hierarchicalporous structure, and the catalyst electrolyzes water to produce hydrogen under acidic or alkaline conditions. The 3D hierarchical porous structure in the electrocatalyst can effectively promote transmission of electrolyte and diffusion of generated hydrogen bubbles, and under the synergistic effect of rich double-pore structures, highly-dispersed active nanoparticles and excellent electrocatalytic conductivity brought by adjustable free carbon content, the overpotential in the water electrolysis hydrogen production process is greatly reduced, and excellent electrocatalytic hydrogen productionactivity and stability are obtained.

Description

technical field [0001] The invention relates to the field of electrochemical hydrogen production, in particular to a molybdenum carbide / carbon nanometer electrocatalytic hydrogen production catalyst with a 3D hierarchical porous structure synthesized with ink assistance. Background technique [0002] Due to the increasingly serious environmental pollution problems in the world, people's calls for the development of clean and sustainable new energy sources continue to grow. Hydrogen has the characteristics of high energy density, excellent combustion performance and zero pollution, and is considered to be an excellent green energy that can replace traditional fossil fuels. At present, the main way of industrial hydrogen production is through the catalytic cracking of petrochemical fuels and the steam reforming of natural gas to produce hydrogen. Strategies do not match. In order to continuously and efficiently obtain hydrogen energy, hydrogen production by direct electrolys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J35/00B01J35/10B01J37/08C25B1/04C25B11/06
CPCB01J27/22B01J35/0013B01J35/0033B01J35/1019B01J35/1052B01J37/084C25B1/04Y02E60/36
Inventor 唐颐范学良张宏斌高伯旭卢海洋郑路遥
Owner FUDAN UNIV
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