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High-efficiency water decomposition catalyst hollow cobalt phosphide and preparation method thereof

A technology of cobalt phosphide and catalyst, applied in the field of preparation of hollow cobalt phosphide, can solve the problems of low specific surface area, few active sites, and inability to achieve commercial use, and achieves large specific surface area, flat particle surface, excellent electrical The effect of chemical stability

Active Publication Date: 2021-12-24
ZHEJIANG UNIV HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, cobalt phosphide has attracted the attention of researchers due to its excellent performance, but due to its low specific surface area and too few active sites, these unfavorable factors limit its catalytic efficiency, making it still unable to achieve commercial use. requirements

Method used

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  • High-efficiency water decomposition catalyst hollow cobalt phosphide and preparation method thereof
  • High-efficiency water decomposition catalyst hollow cobalt phosphide and preparation method thereof
  • High-efficiency water decomposition catalyst hollow cobalt phosphide and preparation method thereof

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Embodiment 1

[0036] A method for preparing hollow cobalt phosphide as an efficient water splitting catalyst, the preparation steps are as follows:

[0037] S1. Prepare the required materials: Na 2 MoO 4 2H 2 O, Co (NO 3 ) 2·6H 2 O (98%), 2-methylimidazole (2-MIM, 95%), KOH (85%), methanol, ethanol, Nafion (5 wt%) and IrO 2 , the prepared chemicals were used as received without further purification, and the water used in the experiment was purified by filtration through ion-exchange membranes.

[0038] S2. Synthesis of ZIF-67: Take 30 mL of 20 mM Co(NO 3 ) 2 ·6H 2 O was added to the methanol solution and ultrasonically mixed, then 50 mL of 160 mM 2-MIM methanol solution was added; the mixture was reacted at room temperature for 24 hours without stirring, after the reaction, the precipitate was recovered by centrifugation and washed with excess methanol The precipitate was washed and dried in air at 60° C. to obtain ZIF-67.

[0039] S3.Co(OH) 2 Synthesis of: Take 40mg of ZIF-67 pre...

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Abstract

The invention discloses a high-efficiency water decomposition catalyst hollow cobalt phosphide and a preparation method thereof, and relates to the technical field of water decomposition catalyst preparation. The microstructure of the cobalt phosphide is a single-shell nanocage, and the cobalt phosphide takes CoP as a shell, is a hollow rhombic dodecahedron and is shaped like a cage. The preparation method comprises the preparation steps: by taking a Na2MoO4 aqueous solution as a reaction medium, constructing a Co(OH)2 hollow structure through a Kirkendall effect, then annealing the prepared Co(OH)2 hollow structure in air at the temperature of 500 DEG C to prepare a Co3O4 single-shell nanocage, and then annealing a Co3O4 single-shell nanocage precursor and NaH2PO2 at the temperature of 700 DEG C in an N2 atmosphere to form CoP with the CoP hollow structure. The hollow cobalt phosphide prepared by the method disclosed by the invention has the advantages of mesoporous property, larger specific surface area and higher water decomposition efficiency.

Description

technical field [0001] The invention belongs to the field of water splitting catalysts, in particular to a method for preparing hollow cobalt phosphide as an efficient water splitting catalyst. Background technique [0002] In recent years, with the rapid development of the world economy, the demand and consumption of fossil raw materials have increased significantly. Since fossil raw materials are non-renewable energy sources, their reserves can no longer meet people's needs. In addition, the release of carbon dioxide caused by it leads to the greenhouse effect and seriously affects the survival of human beings. Therefore, the development of alternative energy has become the general trend. Among them, hydrogen has become a research hotspot due to its renewable and non-polluting properties. [0003] At present, industrial hydrogen production mainly adopts catalytic steam reforming, coal gasification, and petroleum cracking, but these methods generally have some disadvantag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/075C01B25/08B82Y40/00
CPCC25B1/04C25B11/075C01B25/08B82Y40/00C01P2004/34C01P2004/03C01P2002/72C01P2006/17C01P2006/12Y02E60/36
Inventor 张漩张炜姜银珠
Owner ZHEJIANG UNIV HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
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