Shin, Jisu Lee, Young Joo Jan, Asif Choi, Sung Min Park, Mi Young Choi, Sungjun Hwang, Jun Yeon Hong, Seung ki Park, Seung Gyu Chang, Hye Jung Cho, Min Kyung Singh, Jitendra Pal Chae, Keun Hwa Yang, Sungeun Ji, Ho-Il Kim, Hyoungchul Son, Ji-Won Lee, Jong-Ho Kim, Byung-Kook Lee, Hae-Weon Hong, Jongsup Lee, Yun Jung Yoon, Kyung Joong 2024-01-19T16:02:02Z 2024-01-19T16:02:02Z 2021-09-02 2020-12 1754-5692 https://pubs.kist.re.kr/handle/201004/117745 Single-atom catalysts provide unique catalytic properties and maximize the atom utilization efficiency. While utilizing them at elevated temperatures is highly desirable, their operating temperature is usually kept below 300 degrees C to prevent isolated atoms from agglomerating. Moreover, their applications in high-temperature electrochemical devices have been hindered by the lack of suitable processing techniques for catalyst loading. Herein, we report single-atom Pt/ceria nanocatalysts that are highly active and thermally stable in solid oxide cells (SOCs) operating at 600-800 degrees C. Our urea-based chemical solution process creates strong Pt-O-Ce interactions that securely anchor isolated Pt atoms to the surface of ceria nanoparticles and suppress their high-temperature migration. These single-atom Pt/ceria nanocatalysts are loaded in the oxide fuel electrode of a SOC via an in situ synthetic process, which reduces the polarization resistance from 28.2 to 0.82 Ohm cm(2) at 600 degrees C. This electrode outperforms the state-of-the-art Ni-based fuel electrode by up to 10 times and delivers extremely high performance in full SOCs in fuel cell and electrolysis modes. Furthermore, it stably operates at 700 degrees C for over 500 h under realistic operating conditions. Our results provide guidance to resolve the critical issues for the practical use of single-atom catalysts in various industrial processes and accelerate the commercial development of next-generation high-temperature energy devices. English Royal Society of Chemistry Highly active and thermally stable single-atom catalysts for high-temperature electrochemical devices Article 10.1039/d0ee01680b 1 Energy & Environmental Science, v.13, no.12, pp.4903 - 4920 Energy & Environmental Science 13 12 4903 4920 N scie scopus 000599751100021 2-s2.0-85098332044 Chemistry, Multidisciplinary Energy & Fuels Engineering, Chemical Environmental Sciences Chemistry Energy & Fuels Engineering Environmental Sciences & Ecology Article WATER-GAS SHIFT OXIDE FUEL-CELLS ATOMICALLY DISPERSED PALLADIUM ACCESSIBLE METALLIC SURFACE CO OXIDATION IN-SITU STABILIZED ZIRCONIA SUPPORTED PLATINUM LATTICE OXYGEN SELECTIVE HYDROGENATION solid oxide fuel cell solid oxide electrolysis cell single atom catalyst