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Preparation method and application of carbon paper or carbon cloth supported hetero atom-doped molybdenum carbide hydrogen evolution catalyst

A heteroatom and catalyst technology, applied in the field of catalyst materials, to achieve the effects of multiple active sites, conducive to electron transport, and controllable structure

Active Publication Date: 2019-10-25
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of nano Mo with high specific surface area, high efficiency and high stability at low cost 2 C catalyst remains a challenge

Method used

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  • Preparation method and application of carbon paper or carbon cloth supported hetero atom-doped molybdenum carbide hydrogen evolution catalyst
  • Preparation method and application of carbon paper or carbon cloth supported hetero atom-doped molybdenum carbide hydrogen evolution catalyst
  • Preparation method and application of carbon paper or carbon cloth supported hetero atom-doped molybdenum carbide hydrogen evolution catalyst

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preparation example Construction

[0038] The preparation method includes: first weighing the mass of carbon fiber paper or carbon fiber cloth, then using alcohol, 0.1 mol / L sulfuric acid, and distilled water to sonicate for 10 minutes respectively, and finally drying at 100° C. for 2 hours. Then, 1-25 wt% of the transition metal nitrate compound is configured into a transition metal nitrate aqueous solution with a mass fraction of 1-60 wt%. Then put the treated carbon fiber paper or carbon fiber cloth into the prepared transition metal nitrate aqueous solution, soak for 0-72h, and then dry at 80°C for 1-5h. Weigh the molybdenum source, carbon black, transition metal powder, sulfur element, nitrogen source, chloroplatinic acid and inorganic salts and mix them evenly, place the soaked carbon fiber paper or carbon fiber cloth on the bottom of the graphite crucible, and place the mixed Put the powder into the graphite crucible, put the graphite crucible into the tube furnace, under the inert gas atmosphere, adopt ...

Embodiment 1

[0041] First weigh the mass of 30wt% carbon fiber cloth, then use alcohol, 0.1mol / L sulfuric acid, and distilled water to sonicate for 10 minutes, and finally dry at 100°C for 2 hours. Weigh 40wt% molybdenum trioxide, 30wt% carbon black and inorganic salt (sodium chloride and potassium chloride in equimolar ratio) 30 times the total weight of the components and mix them uniformly.

[0042] Place the dried carbon fiber cloth on the bottom of the graphite crucible, put the mixed powder into the graphite crucible, put the graphite crucible in the tube furnace, and use the temperature programming method under the helium atmosphere, at room temperature to 600°C , the heating rate is 5°C / min, 600~1100°C, the heating rate is 5°C / min, then keep the temperature at 1100°C for 3 hours, take it out with the furnace cooling to room temperature, wash the residual molten salt with distilled water, and wash the obtained hydrogen evolution catalyst several times, Until the residual molten salt...

Embodiment 2

[0046] First weigh the mass of 25wt% carbon fiber paper, then use alcohol, 0.1mol / L sulfuric acid, and distilled water to sonicate for 10 minutes, and finally dry at 100°C for 2 hours. Then the 5wt% nickel nitrate compound is configured into a nickel nitrate aqueous solution with a mass fraction of 15wt%. Then put the dried carbon fiber paper into the prepared nickel nitrate aqueous solution, soak it for 5 hours, and then dry it at 80°C for 1 hour for later use.

[0047] Weigh 45wt% metal molybdenum powder, 25wt% carbon black and sodium chloride 10 times the total mass of the components and mix them evenly, place the soaked and dried carbon fiber paper on the bottom of the graphite crucible, and put the mixed powder into Put the graphite crucible into the tube furnace, under the argon atmosphere, adopt the temperature programming method, room temperature ~ 600 ℃, heating rate 10 ℃ / min, 600 ~ 800 ℃, heating rate 1 ℃ / min, Then keep it at 800°C for 10 hours, take it out with...

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Abstract

The invention discloses a preparation method and application of a carbon paper or carbon cloth supported hetero atom-doped molybdenum carbide hydrogen evolution catalyst. The preparation method comprises the following steps: uniformly mixing a molybdenum source, carbon black, an inorganic salt and other doping raw materials, putting carbon fiber paper or carbon fiber cloth treated with a transition metal nitrate and the mixed raw materials into a graphite crucible, placing the graphite crucible in a tube furnace, performing synthesis by using a molten-salt growth method in an inert gas at a low temperature of 800-1100 DEG C, and washing the residual molten salt by using distilled water to obtain the carbon fiber paper or the carbon fiber cloth supported hetero atom-doped synthetic molybdenum carbide hydrogen evolution catalyst. The high-performance low-cost hydrogen evolution catalyst prepared by the method can have excellent performance close to that of a commercial 20% Pt / C catalystwhile maintaining excellent stability under acidic conditions; and the synthetic method proposed by the invention has the advantages of a simple process, economical rationality, environmental friendliness, a controllable morphology and structure and easy large-scale production.

Description

technical field [0001] The invention relates to the technical field of catalyst materials, in particular to a preparation method and application of a heteroatom-doped molybdenum carbide hydrogen evolution catalyst supported on carbon paper or carbon cloth. Background technique [0002] With the rapid development of the global economy and the sharp increase in population, non-renewable fossil energy has been excessively exploited and used. Due to the large amount of carbon dioxide and sulfur dioxide and other gases produced during the combustion process, these gases have brought huge harm to the environment and climate. Impact. Therefore, people are urgently looking for a new type of energy to reduce the use of petroleum energy or even replace petroleum energy. Hydrogen energy is considered to be the most ideal energy substitute due to its high efficiency, no pollution, and simple preparation. At present, the preparation methods of hydrogen mainly include: high temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J35/06B01J27/24C25B1/04C25B11/06
CPCB01J27/22B01J27/24C25B1/04C25B11/04B01J35/33B01J35/58Y02E60/36
Inventor 黄军同胡智辉章雷李喜宝熊庆明冯志军陈智
Owner NANCHANG HANGKONG UNIVERSITY
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