Abstract
Methanol-tolerant catalysts were successfully prepared by heat treatment (HT) of a series of single transition metalloporphyrins (V, Mn, Fe, Co, Ni, Cu and Zn) and combination of two transition metalloporphyrins (V/Fe, Co/Fe, Ni/Fe and Cu/Fe). Performance of oxygen reduction in heat-treated metalloporphyrins was evaluated by means of a rotating disk electrode in acid electrolyte with and without methanol. HT-FeTPP/CoTPP is the best catalyst for oxygen reduction. An oxygen reduction mechanism for the heat-treated binary metalloporphyrins is also proposed. The Pt–Ru alloy with an atomic ratio of 50:50 gives the best performance at higher over-potential and high current regions while an atomic ratio of 65:35 shows the best performance at the low over-potential and low current regions. A high surface area of Pt–Ru–Os anode catalyst is synthesized. A single MEA (membrane electrode assembly) methanol fuel cell performance for ARL's Pt–Ru–Os anode shows a very superior performance when compared to a commercial Pt–Ru anode.
Sign-in/Register to access full text options 
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.
