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Modified perovskite negative electrode material for directly electrolyzing pure CO2 at high temperature

A cathode material, perovskite technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of easy carbon deposition, metal particles are easy to sinter and grow, easy to be oxidized, etc., to improve performance and resist carbon deposition and oxygen storage capacity

Inactive Publication Date: 2019-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Generally speaking, cermets have excellent catalytic performance, but they are easy to be oxidized, easy to deposit carbon, and metal particles are easy to sinter and grow up, which limits its application to a certain extent.

Method used

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  • Modified perovskite negative electrode material for directly electrolyzing pure CO2 at high temperature
  • Modified perovskite negative electrode material for directly electrolyzing pure CO2 at high temperature
  • Modified perovskite negative electrode material for directly electrolyzing pure CO2 at high temperature

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A high-temperature direct electrolysis of pure CO 2 The modified perovskite cathode material, taking LSCM perovskite cathode material as an example, the specific preparation method is as follows:

[0027] (1) Preparation of LSCM cathode: LSCM (La 0.75 Sr 0.25 Cr 0.5 mn 0.5 o 3-δ ) powder, GDC (Gd 0.1 Ce 0.9 o 1.95 ) according to the weight ratio of 1:1, mixed evenly in a mortar, adding terpineol solution to prepare a slurry, scraped it on the YSZ electrolyte, and placed it in a muffle furnace for 3 hours at 1100°C;

[0028] (2) Preparation of LSCM electrode skeleton: Mix LSCM powder and GDC in a mortar at a weight ratio of 1:1, add 15% spherical graphite as a pore-forming agent, add terpineol solution to prepare a slurry, and scrape it on On the YSZ electrolyte, place it in a muffle furnace for 3 hours at 1100°C;

[0029] (3) Preparation of Ni-CeO 2 Separately impregnate the modified LSCM cathode: prepare ~0.1mol L separately -1 Ni(NO 3 ) 2 solution and ~1....

Embodiment 2

[0044] A high-temperature direct electrolysis of pure CO 2 The modified perovskite cathode material, taking LSCM perovskite cathode material as an example, the specific preparation method is as follows:

[0045] (1) Preparation of LSCM cathode: LSCM (La 0.75 Sr 0.25 Cr 0.5 mn 0.5 o 3-δ ) powder, GDC (Gd 0.1 Ce 0.9 o 1.95 ) according to the weight ratio of 1:1, mixed evenly in a mortar, adding terpineol solution to prepare a slurry, scraped it on the YSZ electrolyte, and placed it in a muffle furnace for 3 hours at 1100°C;

[0046] (2) Preparation of LSCM electrode skeleton: Mix LSCM powder and GDC in a mortar at a weight ratio of 1:1, add 15% spherical graphite as a pore-forming agent, add terpineol solution to prepare a slurry, and scrape it on On the YSZ electrolyte, place it in a muffle furnace for 3 hours at 1100°C;

[0047] (3) Preparation of Ni-CeO 2 Separately impregnate the modified LSCM cathode: prepare ~0.1mol L separately -1 Ni(NO 3 ) 2 solution and ~1....

Embodiment 3

[0051] A high-temperature direct electrolysis of pure CO 2 The modified perovskite cathode material, taking LSCM perovskite cathode material as an example, the specific preparation method is as follows:

[0052] (1) Preparation of LSCM cathode: LSCM (La 0.75 Sr 0.25 Cr 0.5 mn 0.5 o 3-δ ) powder, GDC (Gd 0.1 Ce 0.9 o 1.95 ) according to the weight ratio of 1:1, mixed evenly in a mortar, adding terpineol solution to prepare a slurry, scraped it on the YSZ electrolyte, and placed it in a muffle furnace for 3 hours at 1100°C;

[0053] (2) Preparation of LSCM electrode skeleton: Mix LSCM powder and GDC in a mortar at a weight ratio of 1:1, add 15% spherical graphite as a pore-forming agent, add terpineol solution to prepare a slurry, and scrape it on On the YSZ electrolyte, place it in a muffle furnace for 3 hours at 1100°C;

[0054] (3) Preparation of Ni-CeO 2 Separately impregnate the modified LSCM cathode: prepare ~0.1mol L separately -1 Ni(NO 3 ) 2 solution and ~1....

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Abstract

The invention relates to a modified perovskite negative electrode material for directly electrolyzing pure CO2 at a high temperature. The negative electrode material is a Ni-CeO2 modified perovskite material. A preparation method of the negative electrode material comprises the following steps: impregnating a perovskite electrode framework in a Ni(NO3)2 solution, impregnating the impregnated framework in a Ce(NO3)3 solution, and calcining and reducing the obtained material to obtain the modified perovskite negative electrode material for directly electrolyzing pure CO2, having better electrochemical performances than the simple perovskite negative electrode material. Ni-CeO2 nanoparticles are prepared on the framework of perovskite oxide by the conventional impregnation process, Ni has a better catalysis effect on CO2 electrolysis than the perovskite material, but is prone to deposit carbon and be oxidized in a pure CO2 environment, the impregnation with CeO2 achieves oxidation resistance and carbon deposition resistance, and the CeO2 also has a certain catalysis property.

Description

technical field [0001] The invention belongs to the field of medium and high temperature solid oxide electrolytic cells, in particular to a high temperature direct electrolysis of pure CO 2 modified perovskite cathode materials. Background technique [0002] At present, fossil resources (such as coal, oil, natural gas, etc.) are still the main source of energy and chemicals. While consuming fossil resources, a large amount of CO is emitted into the air 2 , which poses severe challenges to the global climate and ecological environment. Therefore, CO 2 The efficient separation, storage, and transformation of ions have become current research hotspots. [0003] CO 2 Electrocatalytic reduction reaction for combining renewable energy generation with CO 2 Using combination, under relatively mild reaction conditions, CO 2 Converted into fuels and chemicals such as CO, hydrocarbons and methanol, so as to realize the direct conversion of electrical energy to chemical energy an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04
Inventor 朱雪峰张丽晓胡世庆杨维慎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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