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Method for preparing metallic oxide catalyst by using urea combustion-supporting method

A catalyst and oxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. problem, to achieve the effect of good catalytic performance, simple process and short heating time

Inactive Publication Date: 2011-05-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional preparation of rare earth perovskite-type metal oxide catalysts is rigorous, complicated, and cumbersome, which easily affects the catalytic performance, takes a long time to heat up, and consumes energy.

Method used

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  • Method for preparing metallic oxide catalyst by using urea combustion-supporting method
  • Method for preparing metallic oxide catalyst by using urea combustion-supporting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Preparation Y 0.8 Ba 0.2 mn 0.6 Ni 0.4 o 3 Catalyst, its step is as follows:

[0014] (1), according to the present invention x, 1-x, y, 1-y stoichiometric ratio principle, according to 0.8, 0.2, 0.4, 0.6 weigh Y (NO 3 ) 3 .6H 2 O, Ba(N 3 ) 2 , Ni(NO 3 ) 2 .6H 2 O, containing 50% Mn (NO 3 ) 2 solution, poured into the same corundum crucible with 200mL deionized water, stirred to make it fully dissolved; then according to the amount of urea being 18 parts of the amount of the above four samples, weigh urea and pour it into corundum In the crucible, stir to make it fully dissolved.

[0015] (2) After standing for half an hour, place it on an ordinary electric furnace to heat, stir once every minute until boiling; continue heating, the solution will gradually evaporate to dryness, and burn to obtain a foamy powder; after cooling to room temperature, grind the powder Pass through a 500-mesh sieve and calcinate at 850°C for 2 hours to obtain the catalyst Y of ...

Embodiment 2

[0018] Preparation Y 0.9 Ba 0.1 mn 0.5 Ni 0.5 o 3 Catalyst, its step is as follows:

[0019] (1), according to the principle of stoichiometric ratio of x, 1-x, y, 1-y of the present invention, according to weighing Y (NO 3 ) 3 .6H 2 O, Ba(NO 3 ) 2 , Ni(NO 3 ) 2 、6H 2 O, containing 50% Mn (NO 3 ) 2 solution, pour it into the same corundum crucible with an appropriate amount of deionized water, stir to make it fully dissolved; then according to the amount of urea, which is 14 parts of the amount of the above four samples, weigh urea, and pour it into the corundum In the crucible, stir to make it fully dissolved.

[0020] (2) After standing for half an hour, heat on an ordinary electric stove, stir once every minute during heating until boiling; continue heating, the solution will gradually evaporate to dryness, burn to obtain foamy powder; grind the powder through a 400-mesh sieve , calcined at 600°C for 1h to obtain the catalyst Y of the present invention 0.9 Ba...

Embodiment 3

[0023] Preparation Y 0.7 Ba 0.3 mn 0.3 Ni 0.7 o 3 Catalyst, its step is as follows:

[0024] (1), according to the present invention x, 1-x, y, 1-y stoichiometric ratio principle, weigh Y (NO 3 ) 3 .6H 2 O, Ba(NO 3 ) 2 , Ni(NO 3 ) 2 .6H 2 O, containing 50% Mn (NO 3 ) 2 solution, pour it into the same corundum crucible with an appropriate amount of deionized water, stir to make it fully dissolved; then according to the amount of urea, which is 16 parts of the amount of the above four samples, weigh urea and pour it into the corundum In the crucible, stir to make it fully dissolved.

[0025] (2) After standing for half an hour, heat on an ordinary electric furnace, stir once every minute until boiling; continue heating, the solution is gradually evaporated, burn to obtain foamy powder; grind the powder through a 300-mesh sieve , calcined at 1000°C for 3h to obtain the catalyst Y of the present invention 0.7 Ba 0.3 mn 0.3 Ni 0.7 o 3 .

[0026] (3) Stack the c...

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Abstract

The invention discloses a method for preparing a metallic oxide catalyst by using a urea combustion-supporting method, which belongs to the field of zinc-air batteries. According to the preparation method of the catalyst in the invention, the general formula of the prepared catalyst is AxA'1-xByB'1-yO3, wherein A comprises Y, La and Pr; A' comprises Sr, Ca, Ba, Be and Ra; B and B' refer to transition metal elements, such as Ni, Fe, Co, Cu, Mn and Ti; and x is equal to (0.1 to 0.9), and y is equal to (0.1 to 0.9). The method disclosed by the invention comprises the following steps of: completely dissolving rare-earth element (REE) nitrates A, REE nitrates A', transition metal element nitrates B, transition metal element nitrates B' and urea into deionized water; heating the obtained mixture; drying the mixture by distillation; sequentially burning and grinding the obtained product; sieving the obtained object; and finally, calcining the obtained particles subjected to sieving so as to obtain the catalyst disclosed by the invention. The method disclosed by the invention is simple in process, short in procedure, less in energy consumption, and lower in cost, and the prepared catalyst has a good catalytic property, therefore, the method provided by the invention is suitable for the high current discharge of the zinc-air batteries.

Description

technical field [0001] The invention relates to a rare-earth perovskite metal oxide catalyst applied to an air electrode of a zinc-air battery, a method for preparing the catalyst and a method for using the catalyst for air electrodes, and belongs to the technical field of zinc-air batteries. Background technique [0002] Zinc-air batteries have large capacity and high specific energy, up to 1350Wh / Kg in theory, and 200-400Wh / Kg in practice, stable working voltage, easy to obtain raw materials, low price, no pollution, recyclable, and no pollution during use. Advantages such as special difficulty and security. [0003] However, the discharge current density of zinc-air batteries is small. In order to increase the discharge current density, it has always been a common goal of researchers to seek catalysts with good catalytic performance. Gold and silver are ideal catalysts, but the cost is too high to achieve industrialization; the production of metal chelates is complicated...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/83H01M4/88
CPCY02E60/50
Inventor 竺培显周春森
Owner KUNMING UNIV OF SCI & TECH