|About this Abstract
||Materials Science & Technology 2019
||Advanced Manufacturing, Processing, Characterization and Modeling of Functional Materials
||Investigation of the Deposition Mechanism of Nano-CeO2 Catalyst within SOFC Electrodes using Bio-adhesive Catechol Surfactants
||Ozcan Ozmen, Shiwoo Lee, Gregory Hackett, Harry Abernathy, Edward M. Sabolsky
|On-Site Speaker (Planned)
||Edward M. Sabolsky
We developed an efficient catechol adhesive-assisted infiltration protocol for decorating solid-oxide fuel cells (SOFC) electrodes with nano- CeO2 catalyst to enhance electrochemical kinetics. Catechol surfactants such as poly-norepinephrine (pNE) are biomolecules that are used as material-independent binding, local chelating and wetting agents due to their multi-functional side groups. These types of surfactants were shown to assist the distinct control of the deposition, dispersion, and particle size of nano-CeO2 catalyst throughout the SOFC electrodes. To investigate the deposition mechanism, we monitored the growth of nano-CeO2 structures associated with the surfactants on YSZ single crystals and porous electrode surfaces, with the variables of coated surfactant morphology, catalyst precursor concentration and deposition time. Deposited nano-CeO2 structures on the ultra-flat YSZ single crystals were characterized using AFM and XPS. The samples were annealed up to 150 h at 750oC to monitor the particle coarsening depending on deposition parameters.