SnOx surface modified Sr2Fe1.5Mo0.5O6-δ cathode with enhanced electrocatalytic activities for direct CO2 electrolysis in solid oxide electrolysis cells

Enli Wang; Liang Zhao; Zhibin Yang; Changfei Liu; Sailong Wang; Ruizhi Yang; Chao Jin

doi:10.1016/j.jcis.2024.11.142

SnO_x surface modified Sr₂Fe_1.5Mo_0.5O_6-δ cathode with enhanced electrocatalytic activities for direct CO₂ electrolysis in solid oxide electrolysis cells

J Colloid Interface Sci. 2024 Nov 20;680(Pt B):605-612. doi: 10.1016/j.jcis.2024.11.142. Online ahead of print.

Authors

Enli Wang¹, Liang Zhao², Zhibin Yang³, Changfei Liu², Sailong Wang², Ruizhi Yang⁴, Chao Jin⁵

Affiliations

¹ College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, China; Research Center of Solid Oxide Fuel Cell, China University of Mining and Technology-Beijing, Beijing 100083, China.
² College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, China.
³ Research Center of Solid Oxide Fuel Cell, China University of Mining and Technology-Beijing, Beijing 100083, China. Electronic address: yangzhibin0001@163.com.
⁴ College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, China. Electronic address: yangrz@suda.edu.cn.
⁵ College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, China. Electronic address: jinchao@suda.edu.cn.

PMID: 39579426
DOI: 10.1016/j.jcis.2024.11.142

Abstract

Surface modification and/or reconstruction for perovskite oxides cathode is an efficient strategy to accelerate sluggish kinetics of CO₂ reduction reaction (CO2RR) in solid oxide electrolysis cells (SOECs). Herein, active SnO_x nanoparticles with average size of ∼10 nm are loaded on the surface of Sr₂Fe_1.5Mo_0.5O_6-δ (SFM) cathode via a facile wet infiltration method. Benefiting from improved specific surface area, expended three phase boundaries, optimized CO₂ adsorption/activation abilities, as well as additional oxygen vacancies, the as-prepared SOEC with the SFM@SnO_x cathode delivers an enhanced current density of 0.691 A cm^-2 under an applied voltage of 1.5 V at 850 °C for the CO₂ electrolysis, and successfully operates 100 h without any attenuation under 1.2 V at 800 °C. This work offers new insights into tailoring perovskite oxide cathode for the CO₂ electrolysis in SOEC via a surface post-treatment strategy.

Keywords: CO(2) electrolysis; Perovskite oxides cathode; SnO(x); Solid oxide electrolysis cells; Surface modification.