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Preparation method of NiS2 catalyst with high specific surface area

A technology with high specific surface area and specific surface area, used in electrochemical generators, fuel cells, electrical components, etc., can solve problems such as high price, large-scale commercial application constraints, and reduced catalytic activity.

Inactive Publication Date: 2017-02-15
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Angewandte Chemie International Edition, 2015, 54(12): 3669-3673) These materials are scarce, expensive, and easily poisoned during the catalytic process, resulting in reduced catalytic activity and short operating life. Their large-scale commercial application has been severely restricted

Method used

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  • Preparation method of NiS2 catalyst with high specific surface area
  • Preparation method of NiS2 catalyst with high specific surface area
  • Preparation method of NiS2 catalyst with high specific surface area

Examples

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Embodiment 1

[0013] A NiS with high specific surface area 2 The preparation method of the catalyst comprises the following steps: respectively placing 1.6g of sodium sulfide, 0.7g of nickel chloride and 70ml of water in a 100ml beaker, and adjusting the pH to 4, stirring for 2h, and then carrying out hydrothermal heating at a temperature of 120°C. Keep the hydrothermal time for 10 hours, filter the hydrothermal sample, then put it into distilled water to boil, filter and wash until neutral, dry at 60°C for 10 hours to obtain NiS with high specific surface area 2 catalyst. figure 1 In order to prepare NiS with high specific surface area 2 SEM image of the catalyst. It is obvious from the figure that the nanospheres are piled up by small particles, and the dispersion is relatively uniform. figure 2 is the XRD pattern of the catalyst. In the analysis of the XRD pattern, the peaks at 31.5°, 35.3°, 38.8°, 45.1° and 53.5° correspond to NiS 2 (200), (210), (211), (220) and (311) crystal fac...

Embodiment 2

[0015] A NiS with high specific surface area 2 The preparation method of the catalyst comprises the following steps: respectively placing 1.6g of sodium sulfide, 0.7g of nickel chloride and 70ml of water in a 100ml beaker, and adjusting the pH to 5, stirring for 2h, and then carrying out hydrothermal treatment, the hydrothermal temperature being 120°C, Keep the hydrothermal time for 10 hours, filter the hydrothermal sample, then put it into distilled water to boil, filter and wash until neutral, dry at 60°C for 10 hours to obtain NiS with high specific surface area 2 catalyst. With respect to the example 1 of the catalyst prepared by this method, the particle agglomeration is relatively severe, and the distribution is uneven, and the current density (37mA cm -2 ) and specific surface area (130.2m 2 g -1 ) decreased significantly, and its electrocatalytic performance was not particularly good.

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Abstract

The present invention discloses a preparation method of an NiS2 catalyst with a high specific area. The method comprises the following steps of mixing and dispersing sodium sulfide and nickel chloride in a water solution, adjusting pH of the solution, stirring, heating by water, filtering, washing and stoving to obtain the NiS2 catalyst with high specific surface area. The specific surface area of the NiS2 catalyst prepared by the method can reach 215.8m<2>g<1>, so that high specific surface area is beneficial for improving the electrocatalysis performance of the catalyst for ethanol oxidization in a sodium hydroxide solution, and facilitates mass transfer. The raw material of the NiS2 catalyst is low-cost, the preparation method is simple, and the NiS2 catalyst is a novel high-performance catalyst directly used as the ethanol fuel battery anode.

Description

technical field [0001] The invention relates to a method for preparing an ethanol catalytic oxidant, in particular to a NiS with a high specific surface area 2 Catalyst preparation method. Background technique [0002] In recent years, energy shortage and environmental pollution are two major problems facing the world today. Direct fuel cells have the advantages of wide fuel source, high energy conversion rate, low pollution, convenient storage and transportation, etc. The field has broad application prospects and has received worldwide attention and attention. 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. However, the low activity and high price of electrode electrocatalysts are still one of the key issues hindering the c...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M8/1011
CPCH01M4/88H01M4/90H01M8/1013Y02E60/50
Inventor 石文娟张亚彬余建国赵永男覃发梅
Owner TIANJIN POLYTECHNIC UNIV
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