We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effect of Active Site Poisoning on Iron−Nitrogen−Carbon Platinum‐Group‐Metal‐Free Oxygen Reduction Reaction Catalysts Operating in Neutral Media: A Rotating Disk Electrode Study.
- Authors
Ficca, Valerio C. A.; Santoro, Carlo; D'Epifanio, Alessandra; Licoccia, Silvia; Serov, Alexey; Atanassov, Plamen; Mecheri, Barbara
- Abstract
Platinum‐group‐metal‐free (PGM‐free) catalysts are the most promising materials to substitute expensive platinum catalysts for efficient oxygen reduction reaction (ORR), particularly for microbial fuel cells. For these devices, contamination due to wastewater is one of the major issues, owing to the presence of various poisoning anions. The known nitrite contamination effect over PGM‐free catalysts was studied by using the rotating disk electrode (RDE) technique in neutral media to understand its patterns. The results were then compared to other contaminants commonly found in wastewater such as chloride (Cl−), perchlorate (ClO4−), and nitrate (NO3−) in the concentration range of 0.05–50 mM. Onset potential (Eonset), half‐wave potential (E1/2), limiting disk current density (Jlim) and Tafel slope variations were the parameters exploited to identify specific or nonspecific adsorbed contaminants. Chloride and nitrate had no negative effect on ORR performance, whereas perchlorate slightly reduced the catalyst function with no permanent issues. Durability tests (1000 cycles) were also performed to ensure the stability of the catalyst for the relatively long time.
- Subjects
ROTATING disk electrodes; OXYGEN reduction; PERCHLORATE removal (Water purification); PLATINUM catalysts; PLATINUM group catalysts; POLLUTANTS
- Publication
ChemElectroChem, 2020, Vol 7, Issue 14, p3044
- ISSN
2196-0216
- Publication type
Article
- DOI
10.1002/celc.202000754