A self-recovering robust electrode for highly efficient CO2 electrolysis in symmetrical solid oxide electrolysis cells

被引：62

作者：

Tian, Yunfeng ^{[1
]}

Zhang, Lingling ^{[1
]}

Liu, Yun ^{[1
]}

Jia, Lichao ^{[1
,2
]}

Yang, Jun ^{[3
]}

Chi, Bo ^{[1
,2
]}

Pu, Jian ^{[1
,2
]}

Li, Jian ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Sch Mat Sci & Engn, Ctr Fuel Cell Innovat, Wuhan 430074, Hubei, Peoples R China

[2] Huazhong Univ Sci & Technol, MOE Key Lab Mat Chem Energy Convers & Storage, Wuhan 430074, Hubei, Peoples R China

[3] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2019年 / 7卷 / 11期

基金：

中国国家自然科学基金;

关键词：

CARBON-DIOXIDE; PEROVSKITE; CATHODE; PERFORMANCE; REDUCTION; CHROMATE; NANOCATALYST; CATALYST;

D O I：

10.1039/c9ta00643e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Symmetrical solid oxide electrolysis cells (S-SOECs) have received increasing attention due to their low fabrication cost and simple preparation procedure. However, the investigation of S-SOECs for CO2 electrolysis has been hindered due to the lack of high performance stable electrodes with good CO2 reduction reaction (CO2-RR) and oxygen evolution reaction (OER) catalytic activity. Herein, a novel perovskite La0.6Ca0.4Fe0.8Ni0.2O3-delta (LCaFN) is investigated as an electrode of S-SOECs for CO2 electrolysis. The S-SOEC has a low polarization resistance of only 0.04 Omega cm(2) and achieves a maximum electrolysis current density of 1.41 A cm(-2) at 800 degrees C with pure CO2 at 2.0 V. LCaFN electrodes show good stability and can be recovered by simple air treatment after a period of operation to avoid the formation of carbonates with alkaline earth elements in the perovskite as La0.6Sr0.4Fe0.8Ni0.2O3-delta (LSrFN). The mechanism of self-recovery of the LCaFN electrode by air treatment is discussed and analyzed.

引用

页码：6395 / 6400

页数：6

共 43 条

[1] CO/CO2 Study of High Performance La0.3Sr0.7Fe0.7Cr0.3O3- Reversible SOFC Electrodes [J].