Abstract
In-situ fluorescence experiments were performed with 6-carboxy fluorescein (6CFL) as the fluorescent molecular probe for monitoring reactive oxygen species (ROS) formation in an operating fuel cell. Modified rhodamine 6G (R6G) was used to prevent platinum-6CFL interactions (metal-dye interactions) during these measurements. ROS generated during fuel cell operation degrade the Nafion® membrane resulting in the release of fluoride ions. The concentration of fluoride was measured ex-situ in the effluent stream at regular time intervals and the trend of the ex-situ fluoride-ion concentration data mirrored the trend of the in-situ fluorescence data. The effect of relative humidity on ROS induced degradation was examined with the in-situ and ex-situ techniques. Lower relative humidities resulted in greater ROS induced degradation. Additionally, we report the modification of cerium (IV) oxide with doped nitrogen resulted in a sustained efficacy for free radical scavenging.
Published Version
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.
