Preparation method for transition metal oxide nitrogen-and-phosphorus-doped catalyst applied to zinc-air battery

A transition metal, zinc-air battery technology, applied in fuel cell type half cells and primary cell type half cells, battery electrodes, circuits, etc., can solve the problems of limited resources and expensive cathode catalysts, and achieve a simple preparation process. , Conducive to large-scale development and utilization, the effect of excellent oxygen reduction activity

Active Publication Date: 2018-07-27
山东科源新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the problem in the prior art that the zinc-air battery cathode catalyst is expensive and has limited resources, the purpose of th

Method used

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  • Preparation method for transition metal oxide nitrogen-and-phosphorus-doped catalyst applied to zinc-air battery
  • Preparation method for transition metal oxide nitrogen-and-phosphorus-doped catalyst applied to zinc-air battery
  • Preparation method for transition metal oxide nitrogen-and-phosphorus-doped catalyst applied to zinc-air battery

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Embodiment 1

[0033] A method for preparing a transition metal oxide nitrogen and phosphorus doped catalyst applied to a zinc-air battery, specifically comprising the following steps:

[0034] The first step, at room temperature, add 0.25g manganese acetate to quantitative phytic acid and ultrasonically for 20min to dissolve all the metal salts; then add excess acetone to the solution to produce supramolecular compound precipitation, finally pour out the solvent, and wash the supramolecular compound repeatedly with acetone Compound 3 times. In the second step, the supramolecular compound obtained in the first step was transferred to the porcelain boat of the tube furnace, and the temperature was raised to 800°C at a rate of 5°C / min under an argon atmosphere, and then kept at a constant temperature for 2 hours, and finally Cool to room temperature. In the third step, the sample obtained in the previous step is fully ground, transferred to a single-necked flask, added with excess 2M hydrochl...

Embodiment 2

[0036] A method for preparing a transition metal oxide nitrogen and phosphorus doped catalyst applied to a zinc-air battery, specifically comprising the following steps:

[0037] The first step is to add 0.25g of copper acetate to 2ml of phytic acid at room temperature and ultrasonically for 20 minutes to dissolve all the metal salts; then add excess acetone to the solution to produce supramolecular compound precipitation, and finally pour out the solvent and wash the supramolecular compound repeatedly with acetone Compound 3 times. In the second step, the supramolecular compound obtained in the first step was transferred to the porcelain boat of the tube furnace, and the temperature was raised to 800°C at a rate of 5°C / min under an argon atmosphere, and then kept at a constant temperature for 2 hours, and finally Cool to room temperature. The third step is to fully grind the sample obtained in the previous step, transfer it to a single-necked flask, add excess 2M hydrochlori...

Embodiment 3

[0039] A method for preparing a transition metal oxide nitrogen and phosphorus doped catalyst applied to a zinc-air battery, specifically comprising the following steps:

[0040]The first step is to add 0.25g of cobalt acetate to 2ml of phytic acid at room temperature and ultrasonically for 20 minutes to dissolve all metal salts; then add excess acetone to the solution to produce supramolecular compound precipitation, and finally pour out the solvent and wash the supramolecular compound repeatedly with acetone Compound 3 times. In the second step, the supramolecular compound obtained in the first step was transferred to the porcelain boat of the tube furnace, and the temperature was raised to 800°C at a rate of 5°C / min under an argon atmosphere, and then kept at a constant temperature for 2 hours, and finally Cool to room temperature. The third step is to fully grind the sample obtained in the previous step, transfer it to a single-necked flask, add excess 2m hydrochloric aci...

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Abstract

The invention discloses a preparation method for a transition metal oxide nitrogen-and-phosphorus-doped catalyst applied to a zinc-air battery. The preparation method comprises the following steps: subjecting acetate containing M metal ions and phytic acid to coordination to form a supramolecular compound; with the transition metal supramolecular compound as a precursor, carrying out high-temperature calcination in an inert atmosphere; and finally, with ammonia gas as a N source, carrying out N doping at high temperature so as to obtain a final transition metal phosphorus oxynitride. The transition metal phosphorus oxynitride, used as an oxygen reduction catalyst, effectively reduces the overpotential of the ORR; and a rotating disk electrode (RDE) and a rotating ring disk electrode (RRDE)indicate that the ORR process is based on a four-electron catalytic mechanism and is an ideal ORR reaction process. The electrocatalyst of the invention gives full play to the synergistic effect of transition metal and hetero atom elements in electrocatalysis, and shows excellent catalytic performance in application to the zinc-air battery.

Description

technical field [0001] The invention belongs to the field of new energy material technology and electrochemical catalysis technology, and specifically relates to a preparation method of a transition metal oxide nitrogen phosphorus doped catalyst applied to a zinc-air battery. Background technique [0002] With the world's increasing demand for energy and increasingly serious environmental problems, we urgently need an efficient, low-cost and environmentally friendly energy conversion and storage system. Metal-air batteries are considered a new type of energy conversion device without environmental pollution, and their efficiency is significantly higher than that of traditional generators. In recent years, zinc-air batteries have shown good application prospects. However, in order to achieve real commercial application of zinc-air batteries, problems such as the cost and performance of cathode catalysts need to be solved. The oxygen reduction reaction (ORR) is the cathodic r...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M12/06
CPCH01M4/9016H01M4/9083H01M12/06
Inventor 刘希恩李平
Owner 山东科源新材料有限公司
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