In-situ precipitation method self-assembled core-shell structure nanoparticle modified perovskite oxide electrode material, preparation method and application thereof

Abstract

The invention discloses an in-situ precipitation method self-assembled core-shell structure nanoparticle modified perovskite oxide electrode material, a preparation method and application thereof. The preparation method comprises the steps: preparing a perovskite oxide precursor, and obtaining core-shell structure nanoparticles of NiFe alloy coated with ion oxide FeO through an in-situ reduction precipitation method, wherein the nanoparticles are loaded on the surface of the perovskite oxide. According to the invention, the electrode material is applied to a cathode of a solid oxide electrolytic cell for high-temperature carbon dioxide electrolysis, so that the catalytic activity of the cathode material to carbon dioxide is effectively improved; as the anode of the solid oxide fuel cell, the electrode material has high fuel oxidation performance, and can improve the carbon deposition resistance; and the method has the characteristics of simple preparation, controllable conditions and obviously improved performance, and has wide application prospects in the field of preparation of solid oxide electrolytic cell cathodes and solid oxide fuel cell anodes.

Description

technical field [0001] The invention belongs to the technical field of solid oxide electrolytic cell and solid oxide fuel cell, and specifically relates to an in-situ precipitation method self-assembled core-shell structure nano particle modified perovskite oxide electrode material and its preparation method and application. [0002] technical background [0003] With the rapid development of industrialization, human beings have intensified the development and utilization of energy, which has also caused serious environmental problems. It is an effective solution to find energy conversion devices with high energy conversion efficiency and environmental friendliness. A solid oxide fuel cell is an efficient energy conversion device that converts fuel (H 2 , CH 4 , C 3 h 8 etc.) to convert chemical energy into electrical energy and store it. The solid oxide electrolytic cell converts electrical energy into chemical energy, such as electrolyzing water and (CO 2 ) system H ...

AI Technical Summary

Problems solved by technology

However, no nanoparticle-precipitated Sr reported in the literature 2 Fe 1.5 Mo 0.5 o 6-δ -GDC cathode material (H.Lv, Y.Zhou, X.Zhang, Y.Song, Q.Liu, G.Wang, X.Bao, Infiltration of Ce 0.8 Gd 0.2 o 1.9 nanoparticles onSr 2 Fe 1.5 Mo 0.5 o 6 -delta cathode for CO 2 electroreduction in solid oxide electrolysis cell, Journal of Energy Chemistry, 35(2019) 71-78.) In carbon dioxide electrolysis at 800°C, 1.4V is only 0.263mA cm -2

And the Sr with NiFe alloy modification 2.0 Fe 1.35 Mo 0.45 Ni 0.2 o 6-d –Gd 0.2 Ce 0.8 o 1.9 The electrolysis current of the material is also only 0.619mA cm -2

show poor performance

[0005] However, as an anode for solid oxide fuel cells, perovskite oxides not only exhibit poorer catalytic activity than Ni-based materials, but also face the challenge of carbon deposition.

Electrodes of perovskite oxide coated with metal nanoparticles still have problems of particle agglomeration and a small amount of carbon deposition because the metal nanoparticles are directly exposed on the surface

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