Preparation method of nitrogen-doped nickel/carbon high-performance ethanol oxidation catalyst

A technology of ethanol oxidation and nitrogen doping is applied in the field of preparation of nickel/carbon high-performance ethanol oxidation catalyst, which can solve the problems of high price, restriction of large-scale commercial application, short operating life and the like

Inactive Publication Date: 2017-02-22
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These materials are scarce, expensive, and easily poisoned during the catalytic process, resulting in reduced catalytic activity and short operating life, and their large-scale commercial application has been severely restricted.

Method used

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  • Preparation method of nitrogen-doped nickel/carbon high-performance ethanol oxidation catalyst
  • Preparation method of nitrogen-doped nickel/carbon high-performance ethanol oxidation catalyst
  • Preparation method of nitrogen-doped nickel/carbon high-performance ethanol oxidation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0012] A kind of nitrogen-doped nickel / carbon high-performance ethanol oxidation catalyst preparation method, comprises the steps: 2.0g glucose, 2.3g urea, 0.5g nickel acetate and 50ml water are respectively placed in 100ml beaker, stirred at room temperature for 30min, Dry at 80°C for 12 hours; then raise the temperature to 800°C at a rate of 3°C / min under a nitrogen atmosphere, and keep the temperature at the highest temperature for 2 hours; then naturally cool down to room temperature under a nitrogen atmosphere; The nickel nitrogen / carbon high-performance ethanol oxidation catalyst was obtained by drying at ℃ for 2 hours. figure 1 It is the EDAX diagram of the nitrogen-doped nickel / carbon high-performance ethanol oxidation catalyst. The spherical structure is clearly seen from the diagram, and the carbon, nitrogen and nickel elements are evenly distributed. figure 2 XRD pattern of the nitrogen-doped nickel / carbon high-performance ethanol oxidation catalyst, it can be seen...

Embodiment 2

[0014] A method for preparing a nitrogen-doped nickel / carbon high-performance ethanol oxidation catalyst, comprising the steps of: respectively placing 2.0g glucose, 1.8g urea, 0.5g nickel acetate and 50ml water in a 100ml beaker, stirring at room temperature for 30min, Dry at 80°C for 12 hours; then raise the temperature to 900°C at a rate of 2°C / min under a nitrogen atmosphere, and keep the temperature at the highest temperature for 2 hours; then naturally cool down to room temperature under a nitrogen atmosphere; The nickel nitrogen / carbon high-performance ethanol oxidation catalyst was obtained by drying at ℃ for 2 hours. The morphology of the catalyst thus prepared is more irregular, there is a small amount of agglomeration, and the distribution is uneven, and relative to Example 1, the current density decreases to some extent (210mA cm -2 ) and the nickel nanoparticles were significantly enlarged.

Embodiment 3

[0016] A method for preparing a nitrogen-doped nickel / carbon high-performance ethanol oxidation catalyst, comprising the steps of: respectively placing 2.0g glucose, 1.8g urea, 0.5g nickel acetate and 50ml water in a 100ml beaker, stirring at room temperature for 30min, Dry at 80°C for 12 hours; then raise the temperature to 800°C at a rate of 3°C / min under a nitrogen atmosphere, and keep the temperature at the highest temperature for 2 hours; then naturally cool down to room temperature under a nitrogen atmosphere; The nickel nitrogen / carbon high-performance ethanol oxidation catalyst was obtained by drying at ℃ for 2 hours. Compared with Example 1, the morphology of the catalyst thus prepared has decreased current density, increased particle size, which is not conducive to oxidation reaction, and reduced nitrogen functional groups, without more active sites.

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Abstract

The invention discloses a preparation method of a nitrogen-doped nickel / carbon high-performance ethanol oxidation catalyst. The preparation method includes the following steps that glucose, urea and nickel acetate are sequentially dispersed in distilled water, and the nitrogen-doped nickel / carbon high-performance ethanol oxidation catalyst can be obtained after stirring, evaporation to dryness, carbonization, washing and drying are completed. The prepared nitrogen-doped nickel / carbon high-performance ethanol oxidation catalyst has high electrocatalytic oxidation activity for ethanol in a sodium hydroxide solution, the current density can reach 327 mA cm<-2>, good stability is achieved, the preparation cost is low, and the novel high-performance catalyst is used for a direct ethanol fuel battery anode.

Description

technical field [0001] The invention relates to a method for preparing an ethanol catalytic oxidant, in particular to a method for preparing a nitrogen-doped nickel / carbon high-performance ethanol oxidation catalyst. Background technique [0002] In recent years, with the increasing demand for energy and environmental protection, people's desire to use new energy technologies such as fuel cells that are efficient, clean, and non-toxic to the human body has become more and more urgent. Direct liquid fuel cells can use methanol as fuel, but methanol has certain toxicity, so new liquids must be explored to replace toxic methanol. Ethanol is renewable, non-toxic, rich in sources, safe to use, and has great potential in practical application and can replace Direct Methanol Fuel Cell. At present, the most studied direct ethanol fuel cell catalysts are still platinum and palladium materials. These materials are scarce in resources, expensive, and easily poisoned in the catalytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
CPCB01J27/24
Inventor 余建国石文娟赵永男
Owner TIANJIN POLYTECHNIC UNIV
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