Novel Perovskite Oxide Hybrid Nanofibers Embedded with Nanocatalysts for Highly Efficient and Durable Electrodes in Direct CO2 Electrolysis

• DOI: 10.1007/s40820-023-01298-w
• Publication Date: 2024-01-22T10:02:14Z
• Authors: Akromjon Akhmadjonov; Kyung Taek Bae; Kang Taek Lee
• Keywords: Nanomaterial-based catalyst; Electrospinning

Abstract The unique characteristics of nanofibers in rational electrode design enable effective utilization and maximizing material properties for achieving highly efficient sustainable CO 2 reduction reactions (CO RRs) solid oxide electrolysis cells (SOECs). However, practical application nanofiber-based electrodes faces challenges establishing sufficient interfacial contact adhesion with the dense electrolyte. To tackle this challenge, a novel hybrid nanofiber electrode, La 0.6 Sr 0.4 Co 0.15 Fe 0.8 Pd 0.05 O 3− δ (H-LSCFP), is developed by strategically incorporating low aspect ratio crushed LSCFP into excess porous interspace high framework synthesized via electrospinning technique. After consecutive treatment 100% H at 700 °C, form perovskite phase situ exsolved metal nanocatalysts concentration oxygen species on surface, enhancing adsorption. SOEC H-LSCFP yielded an outstanding current density 2.2 A cm −2 800 °C 1.5 V, setting new benchmark among reported electrodes. Digital twinning reveals improved increased reaction sites RR. present work demonstrates catalytically active robust fuel structure, paving way further advancements applications -SOECs.