Tong, Jun Seo, Haewon Choi, Yunseo Won, Ji-eun Park, Jinhong Chae, Keun Hwa Hong, Jongsup Chang, Hye Jung Zhou, Baowen Cao, Rongchang Ni, Na Yoon, Kyung Joong Zhu, Lei Huang, Zhen 2025-08-20T06:09:03Z 2025-08-20T06:09:03Z 2025-08-20 2025-10 2198-3844 https://pubs.kist.re.kr/handle/201004/152983 Conventional solid oxide electrolysis cells (SOECs) with nickel/yttria-stabilized zirconia (Ni/YSZ) electrodes suffer from low CO2 reduction activity and severe carbon deposition below 800 degrees C, limiting scalability. This study introduces a novel medium-entropy alloy/Mn-based oxide composite catalyst deposited via simple infiltration onto the fuel electrode, creating hierarchical heterogeneous metal/oxide nano-interfaces. The catalyst-decorated cell achieves a remarkable 46% increase in CO2 electrolysis current density, reaching 2.15 A cm(-2) at 1.5 V and 750 degrees C. Simultaneously, the catalyst demonstrates exceptional carbon deposition resistance, evidenced by a 75% increase in the current density threshold for carbon formation. The cell maintains stable, carbon-free operation for 200 h at an extreme current density of 1.0 A cm(-2). Comprehensive analyses combining in situ characterization and density functional theory (DFT) calculations revealed the enhanced performance originates from synergistic effects between the unique composition of the medium-entropy alloy and Mn-based oxides, and their distinctive nanostructured interfaces. This work presents a promising approach for developing advanced electrode materials for CO2 electrolysis in SOECs, significantly contributing to the scalability and practical application of this critical technology. English Wiley-VCH Verlag Medium-Entropy Alloy/Oxide Nano Composite for High-Performing High-Temperature CO2 Electrolysis with Remarkable Carbon Deposition Resistance Article 10.1002/advs.202508800 1 Advanced Science, v.12, no.39 Advanced Science 12 39 Y scie scopus 001538906800001 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article NI NANOPARTICLES PEROVSKITE REDUCTION CATALYSTS EFFICIENT CO2 electrolysis heterostructure medium-entropy materials SOEC anti-coking