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A preparation method of molybdenum phosphide hydrogen evolution catalyst with rod-like porous morphology

A technology of molybdenum phosphide and catalyst, which is applied in the field of preparation of molybdenum phosphide hydrogen evolution catalyst, which achieves the effects of economical and convenient scale-up and industrial production, good shape and size uniformity, easy scale-up and industrial production

Inactive Publication Date: 2021-01-19
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After consulting, it is found that there are few reports on the study of its morphology and structure. Therefore, it is of great significance to design and prepare molybdenum phosphide with different morphology and structure, and it is also an increasingly important research field in the frontier of materials science.

Method used

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  • A preparation method of molybdenum phosphide hydrogen evolution catalyst with rod-like porous morphology
  • A preparation method of molybdenum phosphide hydrogen evolution catalyst with rod-like porous morphology

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Weigh 0.1mmol of ammonium molybdate tetrahydrate and 0.7mmol of ammonium dihydrogen phosphate into a beaker, add 40mL of deionized water, and magnetically stir to dissolve them completely until a clear and transparent solution is formed, then add 1g of clean and dry absorbent cotton, and continue to stir for a while Time, make the absorbent cotton fully absorb the above solution as much as possible. Then put the impregnated absorbent cotton in an oven for 10 h at 80°C. Then the sample was placed in a muffle furnace and kept at 500° C. for 3 hours to obtain a molybdenum phosphide precursor. Finally, put the porcelain boat containing the precursor into the tube furnace and pass through 5% H 2 / Ar reducing atmosphere at 850 ° C for 2 hours, and after cooling to room temperature, molybdenum phosphide with rod-shaped porous morphology can be obtained.

Embodiment 2

[0014] Weigh 0.1mmol of ammonium molybdate tetrahydrate and 0.7mmol of ammonium dihydrogen phosphate into a beaker, add 40mL of deionized water, and magnetically stir to dissolve them completely until a clear and transparent solution is formed, then add 1.5g of clean and dry absorbent cotton, and continue stirring For a certain period of time, make the absorbent cotton fully absorb the above solution as much as possible. Then put the impregnated absorbent cotton in an oven for 10 h at 80°C. Then the sample was placed in a muffle furnace and kept at 500° C. for 3 hours to obtain a molybdenum phosphide precursor. Finally, put the porcelain boat containing the precursor into the tube furnace and pass through 5% H 2 / Ar reducing atmosphere at 800 ° C for 2 hours, and after cooling to room temperature, molybdenum phosphide with rod-shaped porous morphology can be obtained.

Embodiment 3

[0016] Weigh 0.1mmol of ammonium molybdate tetrahydrate and 0.7mmol of ammonium dihydrogen phosphate into a beaker, add 40mL of deionized water, stir magnetically to dissolve them completely until a clear and transparent solution is formed, then add 2g of clean and dry absorbent cotton, and continue to stir for a while Time, make the absorbent cotton fully absorb the above solution as much as possible. Then put the impregnated absorbent cotton in an oven for 10 h at 80°C. Then the sample was placed in a muffle furnace and kept at 500° C. for 3 hours to obtain a molybdenum phosphide precursor. Finally, put the porcelain boat containing the precursor into the tube furnace and pass through 5% H 2 / Ar reducing atmosphere at 900 ° C for 2 hours, and after cooling to room temperature, molybdenum phosphide with rod-shaped porous morphology can be obtained.

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Abstract

The invention provides a method for preparing a molybdenum phosphide hydrogen evolution catalyst with a porous rod-shaped morphology structure, which includes the following steps: weighing a certain amount of soluble ammonium molybdate and ammonium dihydrogen phosphate and dissolving them in deionized water, and stirring them with magnetic force to completely After dissolving to form a clear and transparent solution, add a certain amount of clean and dry absorbent cotton, and continue stirring for a certain period of time so that the absorbent cotton can fully absorb the above solution; then transfer it to an oven for drying, and put the dried product into a muffle furnace. The molybdenum phosphide precursor is obtained by keeping it at a certain temperature for a certain period of time; finally, the precursor is put into a tube furnace, kept at a certain temperature for a certain period of time in a reducing atmosphere, and then cooled to room temperature to obtain a rod-shaped porous structure. Molybdenum phosphide hydrogen evolution catalyst. The method of the invention has low cost, simple and easy-to-control production process, and the obtained molybdenum phosphide hydrogen evolution catalyst has a rod-shaped porous structure, good morphology and size uniformity, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for preparing a molybdenum phosphide hydrogen evolution catalyst with a rod-shaped porous structure, in particular to a molybdenum phosphide hydrogen evolution catalyst with a rod-shaped porous structure synthesized by using absorbent cotton as a template through a two-step calcination method. Background technique [0002] In recent years, due to its good metal conductivity, molybdenum phosphide is a very good H transfer material, has the properties of rhodium-like palladium noble metals, and has good stability in acid-base media, and is considered to be a A promising hydrogen evolution electrocatalyst. After consulting, it is found that there are few reports on the study of its morphology and structure. Therefore, the design and preparation of molybdenum phosphide with different morphology and structure is of great significance, and it is also an increasingly important research field in the frontier of materials scien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/19B01J35/02B01J37/08B01J37/18B01J35/00
CPCB01J27/19B01J37/0018B01J37/082B01J37/18B01J35/50
Inventor 郭志岩刘萍王友配姜鲁华杜芳林
Owner QINGDAO UNIV OF SCI & TECH