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Enhancing Oxygen Reduction Reaction Catalytic Activity Using a Sub‐Stoichiometric CaTiO 3− δ Additive
Author(s) -
Mazzapioda Lucia,
Lo Vecchio Carmelo,
Paolone Annalisa,
Salvatore Aricò Antonino,
Baglio Vincenzo,
Assunta Navarra Maria
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901292
Subject(s) - catalysis , stoichiometry , electrochemistry , platinum , materials science , oxygen reduction reaction , oxygen , composite number , rotating disk electrode , electrode , chemical engineering , inorganic chemistry , metal , chemistry , composite material , metallurgy , organic chemistry , cyclic voltammetry , engineering
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 (CaTiO 3−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.