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A kind of ceria-based nano electrocatalytic hydrogen evolution catalyst and preparation method thereof

A ceria and catalyst technology, applied in the field of electrocatalytic hydrogen evolution, can solve the problems of poor dispersion of doped metal ions, affecting electrocatalytic activity, and high local concentration, so as to improve electrocatalytic hydrogen evolution activity, enhance conductivity, and large specific surface area. Effect

Active Publication Date: 2020-12-22
XIJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The defects and shortcomings of this type of technology are poor dispersion of doped metal ions, high local concentration, small specific surface area, and difficulty in continuous regulation, which affects the electrocatalytic activity.

Method used

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  • A kind of ceria-based nano electrocatalytic hydrogen evolution catalyst and preparation method thereof

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Effect test

Embodiment 1

[0019] The preparation method of the ceria-based nanometer electrocatalytic hydrogen evolution catalyst comprises the following steps:

[0020] (1) 0.76g Ce(NO 3 ) 3 9H 2 O, 0.47g Co(NO 3 ) 2 ·6H 2 0.0.209g of isonicotinic acid was added in 50ml of absolute ethanol, magnetically stirred until completely dissolved, continued to stir for 30min, and the solution was transferred to a 100ml Teflon-lined reactor with a piece of porous nickel (1cm * 1cm). It was placed in an oven at 120°C for 12 hours, and after cooling to room temperature naturally, the porous nickel loaded with MOF was taken out, washed twice with deionized water and ethanol, and dried in air for 6 hours to prepare the porous nickel-loaded Co-containing 2+ The cerium-based metal-organic framework Ce 0.5 co 0.5 MOF / NF;

[0021] (2) the above-prepared Ce 0.5 co 0.5 MOF / NF was placed in a muffle furnace, calcined in air at 300°C for 2 hours, cooled to room temperature and taken out to obtain the ceria-based ...

Embodiment 2

[0023] Adopt the same step as embodiment 1 to prepare described catalyst Ce 0.1 co 0.9 o 2-δ / NF, just the Co(NO 3 ) 2 ·6H 2 The amount of O added was 4.19 g.

Embodiment 3

[0025] Adopt the same step as embodiment 1 to prepare described catalyst Ce 0.3 co 0.7 o 2-δ / NF, just the Co(NO 3 ) 2 ·6H 2 O addition amount is 1.09g.

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Abstract

The invention provides a ceria-based nanometer electrocatalytic hydrogen evolution catalyst, which includes porous nickel and transition metal-doped ceria supported thereon, wherein the transition metal is selected from Co 2+ ,Ni 2+ At least one of them, the transition metal is evenly dispersed in the cerium dioxide; the preparation method of the catalyst includes the following steps: using Ce 3+ The transition metal M is a metal ion, isonicotinic acid is an organic ligand, and porous nickel is a carrier to synthesize a porous nickel-supported cerium-based metal-organic framework containing a transition metal M, wherein the M is selected from Co 2+ ,Ni 2+ At least one of: the porous nickel-supported cerium-based metal organic framework containing transition metal M is calcined in air to obtain the ceria-based nanoelectrocatalytic hydrogen evolution catalyst. The transition metal ions in the catalyst are evenly dispersed in CeO 2 In the matrix, it also has a large specific surface area and high electrocatalytic hydrogen evolution activity.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic hydrogen evolution, in particular to a ceria-based nanometer electrocatalytic hydrogen evolution catalyst and a preparation method thereof. Background technique [0002] As an efficient, clean and renewable energy, hydrogen energy is an important type of energy in the new energy system and can replace fossil fuels. Hydrogen energy has many unique advantages, such as: abundant resources, high combustion calorific value, clean and environmental protection, etc. Hydrogen production by electrolysis of water is a well-known method for producing hydrogen that is widely used. The method of hydrogen production by electrolysis of water is to use the action of an external power source to promote the electrolysis of water to produce hydrogen. It has the advantages of simple process, no pollution, and recyclable Take advantage of other advantages. However, in the process of electrolyzing water to p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J23/83B01J35/33Y02E60/36
Inventor 朱敏马强任花萍代娆张静刘晨刘戈
Owner XIJING UNIV
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