Abstract
The sluggish oxygen reduction reaction (ORR) in the cathode is hindering the power density of solid oxide fuel cells (SOFCs). Infiltration of catalyst into the cathode of SOFCs is promising to accelerate the ORR. However, the degradation associated with the coarsening of the nanocatalyst is intense. To stabilize the catalyst, atomic layer deposition (ALD) is employed to coat a dual electrocatalyst consisting of a superjacent 2 nm CoOx layer and superjacent 3 nm discrete Pt particles into the porous lanthanum strontium manganite (LSM)/yttria-stabilized zirconia (YSZ) cathode. After 504 h of operation at 750 °C, the ALD coating resulted in the peak power density enhancement by ∼200%, while CoOx becomes Mn-enriched (MnCo)Ox nanograins coupling with nano-Pt. The Pt/(MnCo)Ox nanocouplings are uniformly distributed on the YSZ grain surface, triple-phase boundaries, and at LSM/LSM surface grain boundaries. This study demonstrates an effective approach of stabilizing the minute amount of catalyst for enhancing ORR activity at elevated temperatures.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
