Platinum scarcity and its high cost have led to the requirement of alternative materials catalysing the oxygen reduction reaction (ORR), which is the main rate-determining step occurring in electrochemical devices, including metal-air batteries and fuel cells. We report a study on a sub-stoichiometric calcium titanate (CaTiO3−δ, CTO) compound used as promoter for the ORR in order to reduce the Pt loading and improve its electrocatalytic activity. Composite catalysts based on Pt/C with different amounts of CTO were prepared and their activity was investigated by rotating disk electrode (RDE). The obtained results proved a higher catalytic activity for the composite electrode, with respect to pure Pt/C, in terms of electrochemically active surface area, oxygen reduction current density, onset potential and stability. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Enhancing oxygen reduction reaction catalytic activity using a sub-stoichiometric CaTiO3−δ additive / Mazzapioda, Lucia; Lo Vecchio, Carmelo; Paolone, Annalisa; Aricò, Antonino Salvatore; Baglio, Vincenzo; Navarra, Maria Assunta. - In: CHEMELECTROCHEM. - ISSN 2196-0216. - 6:24(2019), pp. 5941-5945. [10.1002/celc.201901292]

Enhancing oxygen reduction reaction catalytic activity using a sub-stoichiometric CaTiO3−δ additive

Mazzapioda, Lucia;Paolone, Annalisa;Navarra, Maria Assunta
2019

Abstract

Platinum scarcity and its high cost have led to the requirement of alternative materials catalysing the oxygen reduction reaction (ORR), which is the main rate-determining step occurring in electrochemical devices, including metal-air batteries and fuel cells. We report a study on a sub-stoichiometric calcium titanate (CaTiO3−δ, CTO) compound used as promoter for the ORR in order to reduce the Pt loading and improve its electrocatalytic activity. Composite catalysts based on Pt/C with different amounts of CTO were prepared and their activity was investigated by rotating disk electrode (RDE). The obtained results proved a higher catalytic activity for the composite electrode, with respect to pure Pt/C, in terms of electrochemically active surface area, oxygen reduction current density, onset potential and stability. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
calcium titanate; oxygen reduction reaction; electrocatalysts; rotating ring disk
01 Pubblicazione su rivista::01a Articolo in rivista
Enhancing oxygen reduction reaction catalytic activity using a sub-stoichiometric CaTiO3−δ additive / Mazzapioda, Lucia; Lo Vecchio, Carmelo; Paolone, Annalisa; Aricò, Antonino Salvatore; Baglio, Vincenzo; Navarra, Maria Assunta. - In: CHEMELECTROCHEM. - ISSN 2196-0216. - 6:24(2019), pp. 5941-5945. [10.1002/celc.201901292]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1343606
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