Transition metal composite oxide catalytic material and microwave preparation method thereof

A composite oxide and transition metal technology, applied in the field of electrochemistry, can solve the problems of difficult control, complex preparation process, and difficulty in nanoscale transition metal spinel-type composite oxides, and achieves fast heating speed, uniform distribution, increased The effect of product specific surface area
CN101908628AInactive Publication Date: 2010-12-08TIANJIN JIUJU ENERGY TECH DEV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN JIUJU ENERGY TECH DEV
Publication Date
2010-12-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a transition metal composite oxide catalytic material and a microwave preparation method thereof, can output larger working voltage under higher current density, and has simple preparation method, easily controlled preparation process and rich raw material resources. The preparation method comprises the following steps: taking the nitrates of two transition metals according to the stoichiometric ratio of two metal elements, adding distilled water to prepare a solution, adding carbon black, stirring for reaction, and centrifuging to obtain the precipitate; washing the precipitate; drying at 50-80 DEG C and pulverizing to obtain a precursor, wherein the mass ratio of the transition metal composite oxide to the carbon black is 6:4, the A transition metal is one of Co, Mn, Fe and Ni, and the B transition metal is one of Co, Mn and Fe; and calcining the precursor by microwave to obtain the transition metal composite oxide catalytic material. The microwave calcining method of the invention has simple process and high efficiency, and the prepared spinel has a nano crystal form, small particle size and even distribution.
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Description

technical field

[0001] The invention relates to the field of electrochemistry, and more specifically relates to a transition metal composite oxide catalytic material used for an air electrode of an alkaline fuel cell and a microwave preparation method thereof. Background technique

[0002] The positive electrode reaction of the fuel cell is the reduction reaction of oxygen. The positive electrode of the fuel cell that directly uses the oxygen in the air as the oxidant is the air electrode. Oxygen reduction reaction process is complex and kinetics is slow, which is the main part of fuel cell voltage loss. The performance of the air electrode directly determines the voltage, current and power of the battery. Catalytic materials are key technologies for air electrodes and fuel cells.

[0003] At present, platinum group metals are the most effective cathode catalyst materials in low-temperature fuel cells, but the cost of platinum group noble metals as catalytic materials is ...

Claims

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