Zhen Shuying, Zhang Lihong, Xu Chunming, Zhang Ding, Yi Qun, Sun Wang, Sun Kening
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, China.
Beijing Key Laboratory for Chemical Power Source and Green Catalysis, Beijing Institute of Technology, Beijing, China.
Front Chem. 2022 Oct 10;10:1027713. doi: 10.3389/fchem.2022.1027713. eCollection 2022.
Carbon dioxide (CO) gas is the main cause of global warming and has a significant effect on both climate change and human health. In this study, Ni/Ti co-doped SrFeNiTiMoO (SFNTM) double perovskite oxides were prepared and used as solid oxide electrolysis cell (SOEC) cathode materials for effective CO reduction. Ti-doping enhances the structural stability of the cathode material and increases the oxygen vacancy concentration. After treatment in 10% H/Ar at 800°C, Ni nanoparticles were exsolved on the SFNTM surface (Ni@SFNTM), thereby improving its chemisorption and activation capacity for CO. Modified by the Ti-doping and the exsolved Ni nanoparticles, the single cell with Ni@SFNMT cathode exhibits improved catalytic activity for CO reduction, exhibiting a current density of 2.54 A cm at 1.8 V and 800°C. Furthermore, the single cell shows excellent stability after 100 h at 1.4 V, indicating that Ni/Ti co-doping is an effective strategy for designing novel cathode material with high electrochemical performance for SOEC.
二氧化碳（CO₂）气体是全球变暖的主要原因，对气候变化和人类健康都有重大影响。在本研究中，制备了镍/钛共掺杂的SrFeNiTiMoO₆（SFNTM）双钙钛矿氧化物，并将其用作固体氧化物电解池（SOEC）的阴极材料以有效还原CO₂。钛掺杂增强了阴极材料的结构稳定性并增加了氧空位浓度。在800°C下于10%H₂/Ar中处理后，镍纳米颗粒在SFNTM表面析出（Ni@SFNTM），从而提高了其对CO₂的化学吸附和活化能力。通过钛掺杂和析出的镍纳米颗粒改性后，具有Ni@SFNTM阴极的单电池对CO₂还原表现出更高的催化活性，在1.8V和800°C下的电流密度为2.54A cm⁻²。此外，该单电池在1.4V下100小时后显示出优异的稳定性，表明镍/钛共掺杂是设计具有高电化学性能的SOEC新型阴极材料的有效策略。
