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Molybdenum carbide nanosheet, method for preparing same and application of molybdenum carbide nanosheet

A nanosheet, molybdenum carbide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of high synthesis temperature of molybdenum carbide and product agglomeration, and achieve low heating temperature and specific surface area. Large, easy to operate and promote

Active Publication Date: 2019-01-04
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a molybdenum carbide nanosheet and its preparation method and application in order to overcome the existing problems of high molybdenum carbide synthesis temperature and product agglomeration

Method used

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  • Molybdenum carbide nanosheet, method for preparing same and application of molybdenum carbide nanosheet

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Effect test

Embodiment 1

[0051] Molybdenum carbide nanosheets were prepared according to the following steps:

[0052] Step 1: Put 18.5 grams of ammonium paramolybdate, 20 grams of ammonium nitrate, and 12 grams of glycine into a 1000ml beaker at the same time, and add 100ml of deionized water, stir until completely dissolved to form a mixed solution, and put the beaker containing the above mixed solution Put it into a muffle furnace and heat at 160°C for 5 minutes, keep in full contact with the air during the heating process, and fully stir at the same time;

[0053] Step 2: Add glucose to ionized water to prepare a glucose solution with a concentration of 0.2g / mL, and add 30mL of glucose solution to the solution after heating in step 1, and stir to form a mixed solution, and put the mixed solution into a 240-degree heating Heated in the furnace for 12 minutes, and obtained a fluffy solid after the end of heating;

[0054] Step 3: Put the fluffy solid obtained in step 2 into a tube furnace, and redu...

Embodiment 2

[0059] Step 1: Put 11.2 grams of ammonium tetramolybdate, 18 grams of ammonium nitrate, and 9 grams of glycine into a 1000ml beaker at the same time, and add 100ml of deionized water, stir until completely dissolved to form a mixed solution, and put the beaker containing the above mixed solution Put it into a muffle furnace, heat at 170°C for 4 minutes, keep in full contact with the air during the heating process, and fully stir at the same time;

[0060] Step 2: Add glucose to ionized water to prepare a glucose solution with a concentration of 0.2g / mL, and add 20mL of glucose solution to the solution after heating in step 1, and stir to form a mixed solution, and put the mixed solution into a 250-degree heating Heated in the furnace for 10 minutes, and a fluffy solid was obtained after heating;

[0061] Step 3: Put the fluffy solid obtained in step 2 into a tube furnace, and reduce hydrocarbon at 450°C for 2 hours under flowing hydrogen with a hydrogen flow rate of 150mL / min....

Embodiment 3

[0063] Step 1: Put 23.6 grams of ammonium dimolybdate, 22 grams of ammonium nitrate, and 13 grams of glycine into a 1000ml beaker at the same time, and add 100ml of deionized water, stir until completely dissolved to form a mixed solution, and put the beaker containing the above mixed solution Put it into a muffle furnace, heat at 165°C for 5 minutes, keep in full contact with the air during the heating process, and fully stir at the same time;

[0064] Step 2: Add glucose to ionized water to prepare a glucose solution with a concentration of 0.2g / mL, and add 20mL of glucose solution to the solution after heating in step 1, and stir to form a mixed solution, and put the mixed solution into a 230-degree heating Heating in the furnace for 15 minutes, obtaining a fluffy solid after heating;

[0065] Step 3: Put the fluffy solid obtained in step 2 into a tube furnace, and reduce hydrocarbon at 550°C for 1 hour under flowing hydrogen with a hydrogen flow rate of 150mL / min. After t...

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Abstract

The invention relates to a molybdenum carbide nanosheet, a method for preparing the same and application of the molybdenum carbide nanosheet. The method includes uniformly mixing molybdenum sources, ammonium nitrate and glycine with one another, and then heating the molybdenum sources, the ammonium nitrate and the glycine until the temperatures reach 160-180 DEG C so as to obtain mixtures 1; adding glucose into the mixtures 1 and then heating the glucose and the mixtures 1 until the temperatures reach 230-280 DEG C so as to obtain fluffy solid; placing the fluffy solid in hydrogen atmosphere and heating the fluffy solid until the temperature reaches 450-550 DEG C; cooling the fluffy solid to obtain the molybdenum carbide nanosheet. The molybdenum carbide nanosheet, the method and the application have the advantages that the heating temperatures are low when the molybdenum carbide nanosheet is prepared by the aid of the method, the method is convenient to implement and popularize, and prepared molybdenum carbide is free of agglomeration, is in the shape of an irregular sheet, has large specific surface areas and is excellent in catalytic performance during application to electro-catalytic hydrogen production.

Description

technical field [0001] The invention relates to a method for preparing molybdenum carbide, in particular to a molybdenum carbide nanosheet and its preparation method and application. Background technique [0002] The utilization of hydrogen energy is the best alternative green energy for traditional fossil energy, and the utilization of hydrogen energy depends on the development of hydrogen production technology. The electrolysis of water hydrogen production technology is known as "the most ideal industrial hydrogen production method" in the industry. The core issue of this technology is the development of efficient, stable and clean electrocatalyst preparation. At present, platinum-based catalysts are the most efficient electrocatalysts, but their high cost and low storage capacity severely restrict their wide application. [0003] Molybdenum carbide (Mo 2 C) Due to the advantages of noble metal-like properties, roasting resistance, sulfur resistance and nitrogen resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/22B01J35/33B01J35/61Y02E60/36
Inventor 古思勇张厚安陈伟斌周洪涛
Owner XIAMEN UNIV OF TECH
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