Catalyst and preparation method thereof, and process for producing hydrogen through electro-catalytic decomposition of water

A catalyst and process technology, applied in chemical instruments and methods, physical/chemical process catalysts, electrolysis processes, etc., can solve the problems of catalysts that are difficult to work stably for a long time, transition metal catalysts are easy to oxidize, lack of catalysts for synthesis methods, etc., and achieve large-scale Industrial application potential, good and stable work, high electrocatalytic activity and stability effects

Active Publication Date: 2020-05-15
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, non-precious metal catalysts have encountered several problems in practical applications: (1) highly active transition metal catalysts are easily oxidized in air, thus losing their catalytic activity; (2) it is difficult for ordinary catalysts to be used in the actual hydrogen production environment Work stably for a long time; (3) lack of simple and cheap synthetic methods to prepare efficient and stable catalysts

Method used

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  • Catalyst and preparation method thereof, and process for producing hydrogen through electro-catalytic decomposition of water
  • Catalyst and preparation method thereof, and process for producing hydrogen through electro-catalytic decomposition of water
  • Catalyst and preparation method thereof, and process for producing hydrogen through electro-catalytic decomposition of water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Cut the foamed copper into small pieces of 1×2×2cm, ultrasonically degrease and remove oil in acetone for 10 minutes, rinse with ultra-pure water for 3 times, place in 1mol / L hydrochloric acid for 10 minutes to remove surface oxides, and then wash with ultra-pure water for 3 times, to obtain pretreated foamed copper;

[0053] Weigh 0.33g sodium formate and add to 1.5ml ultrapure water to obtain sodium formate solution; weigh 0.05g NiCl2 ·6H 2 O was added into 13mlDMF for ultrasonic dissolution to obtain a nickel chloride solution;

[0054] Mix sodium formate solution and nickel chloride solution with ultrasonic vibration and add them into a 25ml reaction kettle, add pretreated foam copper, seal, place in a temperature-programmed oven with a heating rate of 3°C / min, and react at 160°C for 18 hours. Cool to room temperature, take out the copper foam, wash it alternately with water and ethanol three times, dry it in vacuum at 60°C for 12 hours, and perform electrochemical...

Embodiment 2

[0056] Weigh 0.2g sodium formate and add to 1.5ml ultrapure water to obtain sodium formate solution; weigh 0.2g NiCl 2 ·6H 2 O was added into 13mlDMF for ultrasonic dissolution to obtain a nickel chloride solution;

[0057] Sodium formate solution and nickel chloride solution were mixed and ultrasonically oscillated, then added to a 25ml reaction kettle, and the pretreated foamed copper in Example 1 was added, sealed, placed in a temperature-programmed oven with a heating rate of 3°C / min, at 150°C React at room temperature for 24 hours, take out the copper foam, wash with water and ethanol alternately for 3 times, dry in vacuum at 60°C for 12 hours, and then perform electrochemical hydrogen evolution polarization curve test, place it in the air at room temperature for 6 hours to obtain Catalyst 2.

Embodiment 3

[0059] Weigh 0.1g of sodium formate and add it to 1.5ml of ultrapure water to obtain a sodium formate solution; weigh 0.4g of nickel acetylacetonate and add it to 13ml of DMF for ultrasonic dissolution to obtain a nickel acetylacetonate solution;

[0060] Sodium formate solution and nickel acetylacetonate solution were mixed and ultrasonically oscillated, then added to a 25ml reaction kettle, and the pretreated foamed copper in Example 1 was added, sealed, placed in a temperature-programmed oven with a heating rate of 3°C / min, at 160°C React at room temperature for 20 hours, take out the copper foam, wash with water and ethanol alternately for 3 times, dry in vacuum at 60°C for 12 hours, and then perform electrochemical hydrogen evolution polarization curve test, place it in the air at room temperature for 10 hours to obtain Catalyst 3.

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Abstract

The invention belongs to the technical field of catalysts, and relates to a catalyst and a preparation method thereof, and a process for producing hydrogen through electro-catalytic decomposition of water. A substrate of the catalyst is a copper material, the surface of the copper material is coated with metal nickel with a cubic phase structure, the surface of the metal nickel with the cubic phase structure is coated with metal nickel with a hexagonal phase structure, and nickel oxide or nickel hydroxide is arranged on the surface of the metal nickel with the hexagonal phase structure; the thickness of the metal nickel with the cubic phase structure is 10-200 nm, the thickness of the metal nickel with the hexagonal phase structure is 3-14 nm, and the thickness of the nickel oxide or nickel hydroxide is 1-5 nm; the catalyst provided by the invention has the characteristics of high efficiency, good stability, low cost and simple preparation method in the process of producing hydrogen byelectro-catalytic decomposition of water, and has huge potential application value.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a catalyst, a preparation method and an electrocatalytic decomposition of water to produce hydrogen. Background technique [0002] Hydrogen energy is regarded as the most promising clean energy in the 21st century. Commonly used hydrogen production technologies include coal hydrogen production, natural gas and petroleum hydrogen production, industrial by-product hydrogen, electrolytic water hydrogen production, etc. Among them, the electrolytic water hydrogen production technology mainly includes alkaline water electrolyzer (AE), proton exchange membrane water electrolysis tank (PEM) and solid oxide water electrolyzer (SOE). The AE technology is the most mature, the production cost is relatively low, and it has entered the practical stage. However, the main problem that restricts the promotion of AE technology is the cost. The cost includes electricity price and catalyst cost. ...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J35/02C25B1/04C25B11/06
CPCB01J23/755C25B1/04C25B11/057C25B11/075B01J35/40B01J35/33Y02E60/36
Inventor 郑南峰李智森刘圣杰
Owner XIAMEN UNIV
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