Rutile-Type Co0.5Ti0.5NbO4-Based Cathode with In Situ Exsolved Metal Particles for Direct CO2 Electrolysis

被引：0

作者：

Ruan, Wenji ^{[1
]}

Liu, Xiaojing ^{[1
]}

Ni, Jiupai ^{[1
]}

Ni, Chengsheng ^{[1
]}

机构：

[1] Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2024年 / 16卷 / 35期

关键词：

rutile oxide cathode; in situ exsolution; solidoxide electrolysis cell; CO2; electrolysis; stability; cathode; SOLID OXIDE ELECTROLYSIS; COMPOSITE CATHODE; HIGH-PERFORMANCE; ELECTROCHEMICAL PERFORMANCE; LOW-TEMPERATURE; FUEL ELECTRODE; NI; PEROVSKITE; CELLS; NANOPARTICLES;

D O I：

10.1021/acsami.4c11593

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Rutile-type Co0.5Ti0.5NbO4 (CTO)-based materials doped with Fe3+ or Ni2+ were investigated as cathode electrodes to modify their electrical conductivity and electrocatalysis toward CO2 splitting. Higher electric conductivity was found in Co0.4Fe0.2Ti0.4NbO4 (CTO-Fe, 0.78 S cm(-1)) and Co0.25Ni0.25Ti0.5NbO4 (CTO-Ni, 2.10 S cm(-1)) compared to CTO (0.49 S cm(-1)) after the reduction at 800 degrees C in Ar-5% H-2. Co and Co-Ni particles exsolved in situ from the surface of CTO, CTO-Fe, and CTO-Ni after reduction. CTO-Ni and CTO-Fe cathodes did better in the CO2 electrolysis at 800 degrees C than the CTO one, but the CTO-Ni cell was unstable after 10 h of operation due to the carbon deposition that blocked the electrode. The cell with CTO-Fe demonstrated a good stability for CO2 splitting in 100 h. This work demonstrates that rutile-type CTO-based cathodes are promising to provide an efficient and candidate oxide cathode for the electrolysis of CO2.

引用

页码：46412 / 46420

页数：9

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