Cho, Hagyeong Seo, Haewon Min, Jihong Won, Ji-eun Hong, Jongsup Yoon, Kyung Joong 2024-10-26T07:00:09Z 2024-10-26T07:00:09Z 2024-10-25 2024-11 2050-7488 https://pubs.kist.re.kr/handle/201004/150864 High-temperature solid oxide cells (SOCs) provide a highly efficient route for power generation and hydrogen production. In this study, we develop cobalt-embedded gadolinia-doped ceria nanocatalysts that significantly enhance the performance of nickel-based fuel electrodes of SOCs. These nanocatalysts are synthesized in situ within the pores of the electrode using a urea-based infiltration process. Doping gadolinia into the ceria lattice improves the oxygen ionic conductivity, and uniform gadolinia-doped ceria nanoparticles, 20-30 nm in size, consistently form within both symmetric and full cells. Meanwhile, a portion of the cobalt also forms discrete nanoparticles, less than 10 nm in size, further boosting catalytic activity. The electrochemical performance of the full cells is improved by approximately 30% and 60% in fuel cell and electrolysis mode operations, respectively. Additionally, the cell operates stably for 300 h under a constant electrolysis current of -1.0 A cm(-2) at 700 degrees C, demonstrating that the nanocatalysts remain stable under harsh high-temperature conditions. English Royal Society of Chemistry In situ synthesis of cobalt-embedded gadolinia-doped ceria nanocatalysts for high-temperature solid oxide cells Article 10.1039/d4ta03979c 1 Journal of Materials Chemistry A, v.12, no.41, pp.28002 - 28011 Journal of Materials Chemistry A 12 41 28002 28011 Y scie scopus 001329765500001 2-s2.0-85206441417 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article ANODE POLARIZATION RESISTANCE CATALYSTS ELECTRODE PERFORMANCE FUEL-CELLS