Abstract
Oxygen, a chemically reactive element, is consumed during the oxygen reduction reaction (ORR) via a cathodic reduction process in almost all fuel cell systems. Electrochemical reactions involving oxygen are kinetically slow, therefore, electrocatalysts are needed to increase the rate of this reaction. The ORR activity of electrodeposited manganese dioxide, as well as different powdered polymorphs of MnO2 (α-MnO2; β-MnO2; γ- MnO2 ; δ-MnO2; λ- MnO2) has been investigated using a glassy carbon substrate. Dimethyl sulfoxide (DMSO), dimethylformamide (DMF) and acetonitrile (ACN) with tetraethyl ammonium tetra fluoroborate was used as a supporting electrolyte to assess activity using rotating disk electrode (RDE) and rotating ring disk electrode (RRDE) measurements. The results and the effects of different polymorphs will be described and discussed. Overall, the polymorphs of MnO2 catalysts exhibit good catalytic activity.
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.
