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Iron doped cobaltosic oxide nano-film as well as preparation method and application thereof

A nano- and iron-doped technology of cobalt trioxide, which is applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of unsatisfactory catalytic efficiency, achieve outstanding electrical conductivity and catalytic performance, simple and environmentally friendly preparation methods, and economical and effective preparation methods Effect

Inactive Publication Date: 2014-09-03
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic efficiency of only using tricobalt tetroxide as a cathode catalyst is not ideal

Method used

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  • Iron doped cobaltosic oxide nano-film as well as preparation method and application thereof
  • Iron doped cobaltosic oxide nano-film as well as preparation method and application thereof
  • Iron doped cobaltosic oxide nano-film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation method of the iron-doped tricobalt tetroxide nanofilm:

[0045] 1) The Co(NO 3 ) 2 ·6H 2 O, FeCl 2 4H 2 O and KCl are configured into a dilute solution of 100ml, and the solution is ultrasonicated for 10min after preparation,

[0046] By changing Co(NO 3 ) 2 ·6H 2 O and FeCl 2 4H 2 The molar ratio of O, prepare 5 kinds of solutions respectively, the Co(NO in 5 kinds of solutions 3 ) 2 ·6H 2 The concentration of O is 0.05M, the concentration of KCl is 0.1M, the FeCl in the five solutions 2 4H 2 The concentration of O is respectively 0.005M, 0.00625M, 0.01M, 0.025M, and 0.05M.

[0047] 2) Take 5 pieces of FTO conductive glass with a size of 1.5cm×1.0cm, wash them sequentially with washing powder water, double distilled water, ethanol with a volume fraction of 95%-99.5%, and ultrapure water, and then blow them under a nitrogen environment. Dry, get the FTO conductive glass after processing clean;

[0048] 3) Use the three-electrode system ...

Embodiment 2

[0056] Iron-doped Co3O3 nanofilm as working electrode for electrocatalytic reduction of oxygen

[0057] 1) Nitrogen was passed through 10ml of the prepared 0.1M KOH solution for 20 minutes to remove the oxygen contained in the solution, and the five kinds of iron-doped cobalt tetroxide nano-films prepared in Example 1 were used as working electrodes, and the three-electrode system was used to remove oxygen, that is, nitrogen Carry out cyclic voltammetry scan in saturated KOH solution, the scan rate is 0.1V / s;

[0058] 2) Pass oxygen through 10ml of the prepared 0.1M KOH solution for 20 minutes to saturate the oxygen in the solution, and use the five iron-doped cobalt tetroxide nanofilms prepared in Example 1 as working electrodes, and use the three-electrode system in oxygen-saturated KOH Carry out cyclic voltammetry scanning in the solution, the scanning speed is 0.1V / s;

[0059] pass Figure 6 It can be seen that under the condition of nitrogen saturation, the iron-doped...

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PUM

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Abstract

The invention discloses an iron doped cobaltosic oxide nano-film. The iron doped cobaltosic oxide nano-film is characterized in that a base of the film is formed by a piece of FTO conducting glass, and an iron doped cobaltosic oxide nano-composite material is deposited on the FTO conducting glass, and is composed of an upper nano flower-shaped structure and a lower three-dimensional multi-hole structure. The iron doped cobaltosic oxide nano material is prepared by a simple environment-friendly synthetic method, is utilized as an electrochemical catalyst of oxygen reduction, and is applied to an alkaline fuel cell platinum-free cathode catalyst.

Description

technical field [0001] The invention relates to a cathode catalyst in an alkaline fuel cell and a preparation method thereof. Background technique [0002] A fuel cell is a power generating device that directly converts the chemical energy present in fuel and oxidant into electrical energy. Fuel cells are very complex, involving chemical thermodynamics, electrochemistry, electrocatalysis, material science, power systems, and automatic control. They have the advantages of high power generation efficiency, short construction period, fast load response, and less environmental pollution. According to the type of electrolyte used, fuel source, etc., fuel cells can be divided into the following five types (see attached table): Alkaline Fuel Cell (AFC), Phosphoric Acid Fuel Cell (PAFC), Molten Carbonate Fuel Cell ( MCFC), solid oxide fuel cell (SOFC), proton exchange membrane fuel cell (PEMFC). Alkaline fuel cells are the first development of fuel cell technology, initially used ...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/88
CPCY02E60/50H01M4/9016
Inventor 卢小泉张婧譞陈平彭丹蒋媛
Owner NORTHWEST NORMAL UNIVERSITY
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