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Molybdenum carbide catalyst for hydrogen production from formic acid and preparation method thereof

A catalyst, molybdenum carbide technology, used in the field of hydrogen production and energy catalytic materials, can solve the problem of high cost of precious metals, and achieve the effects of high activity and selectivity, large output, and low surface area carbon

Inactive Publication Date: 2015-09-30
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Noble metals have high catalytic activity for the decomposition of formic acid, but the cost of noble metals is high

Method used

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preparation example Construction

[0033] A kind of preparation method of catalyst for producing hydrogen from formic acid comprises the steps:

[0034] 1) Pretreatment of catalyst carrier

[0035] Impregnate the carrier to be used into HNO with a mass percentage of 5-20% 3 solution or HCl solution, heat on a resistance furnace and continue boiling for 5-15 minutes, after natural cooling, wash with distilled water until pH = 5-7, put it in an oven at 50-100°C and dry for 24-48 hours before use:

[0036] 2) Preparation of catalyst powder precursor

[0037] Dissolve the molybdate and the carbon source in the solvent respectively, the molar concentration of the molybdenum atom is 0.001-1.5mol / L, and the molar ratio of the carbon source to the molybdenum atom is 20-0.1:1, and then mix the two to the Add inorganic acid dropwise to the solution, adjust the pH to 1-5 to obtain a reaction solution, place the reaction solution under a magnetic stirrer at 30-100°C and stir for 4-24 hours to obtain the product, wash...

Embodiment 1

[0050] 1) Pretreatment of catalyst carrier

[0051] Impregnate activated carbon and diatomaceous earth mixture carrier to 5% HNO 3solution, heat it on a resistance furnace and continue to boil for 5 minutes, wash it with distilled water to pH = 5 after natural cooling, and dry it in an oven at 50°C for 48 hours before use:

[0052] 2) Preparation of catalyst powder precursor

[0053] Ammonium molybdate and aniline were dissolved in deionized water, the molar concentration of molybdenum atoms was 0.001mol / L, and the molar ratio of aniline to molybdenum atoms was 20:1, hydrochloric acid was added dropwise to the solution, and the pH was adjusted to 1 to prepare The reaction liquid was obtained, and the reaction liquid was placed under a magnetic stirrer at 30° C. for 24 h to react to obtain the product, which was washed with ethanol, filtered with suction, and dried at 30° C.

[0054] 3) Loading of catalyst powder precursor

[0055] According to the mass of the carrie...

Embodiment 2

[0060] 1) Pretreatment of catalyst carrier

[0061] Immerse the carbon fiber felt into a 10% HCl solution by mass, heat it on a resistance furnace and continue boiling for 7 minutes, wash it with distilled water to pH=6 after natural cooling, and dry it in an oven at 70°C for 35 hours before use:

[0062] 2) Preparation of catalyst powder precursor

[0063] Dissolve sodium molybdate and 1,8-diaminonaphthalene in ethanol and deionized water, the molar concentration of molybdenum atoms is 0.75mol / L, and the molar ratio of diphenylamine to molybdenum atoms is 10:1, dropwise into the solution Nitric acid was added to adjust the pH to 3 to obtain a reaction solution. The reaction solution was placed under a magnetic stirrer at 65°C and stirred for 15 hours to obtain the product. The product was washed with ethanol, filtered with suction, and dried at 65°C.

[0064] 3) Loading of catalyst powder precursor

[0065] According to the mass of the carrier, weigh 5.46g of th...

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Abstract

The invention relates to a molybdenum carbide catalyst for hydrogen generation of methanoic acid and a preparation method of the molybdenum carbide catalyst, belonging to the technical fields of energy catalysis materials and hydrogen preparation. According to the molybdenum carbide catalyst and the preparation method thereof, with one or more of carbon nanotubes, active carbon granules, honeycomb ceramics, carbon fiber felts and kieselguhr as carriers and molybdenum carbide as an active component, one or more than two of Co, Ni, K, Ce and Cu is subjected to metal modification. With the mass of the carrier as a reference, the active components and the metals are respectively 0.1-50 percent and 0.001-50 percent by mass. The molybdenum carbide catalyst has the advantages of safe and simple preparation process, large specific surface area, less surface carbon deposition, rich catalyst property similar to that of noble metals, high efficiency of catalyzing the methanoic acid for hydrogen generation, long service life and the like; and the new application field of hydrogen generation by using the methanoic acid under the catalysis of the molybdenum carbide is developed.

Description

technical field [0001] The invention relates to a molybdenum carbide catalyst for producing hydrogen from formic acid and a preparation method thereof, belonging to the technical fields of energy catalytic materials and hydrogen preparation. Background technique [0002] As an efficient and clean energy, hydrogen can solve energy crisis and environmental problems at the same time, and is the most promising alternative to fossil energy in the future. However, the utilization of hydrogen energy faces three major problems: large-scale and cheap hydrogen production; safe and convenient storage and transportation; extensive and economical application forms, etc. [0003] In recent years, the rapid development of fuel cell technology has provided a great impetus for the development of hydrogen energy. The popularization and application of zero-emission fuel cell vehicles will greatly reduce urban air pollution and improve people's living environment. The key to large-scale applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/22
Inventor 潘志刚陶露露陶亚秋
Owner NANJING TECH UNIV
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