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Open AccessArticle

Performance Improvement in Direct Methanol Fuel Cells by Using CaTiO3-δ Additive at the Cathode

1
Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
2
CNR-ITAE, Istituto di Tecnologie Avanzate per l’Energia “Nicola Giordano”, Via Salita S. Lucia 5, 98126 Messina, Italy
*
Authors to whom correspondence should be addressed.
Catalysts 2019, 9(12), 1017; https://doi.org/10.3390/catal9121017
Received: 8 November 2019 / Revised: 27 November 2019 / Accepted: 28 November 2019 / Published: 2 December 2019
(This article belongs to the Special Issue Electro-Catalysts for Energy Conversion and Storage Devices)
A non-stoichiometric calcium titanate CaTiO3-δ (CTO) was synthesized and used as oxygen reduction reaction co-catalyst (together with Pt/C) in direct methanol fuel cells (DMFCs). A membrane-electrode assembly (MEA), equipped with a composite cathode formulation (Pt/C:CTO1:1), was investigated in DMFC, using a 2 M methanol solution at the anode and oxygen at the cathode, and compared with an MEA equipped with a benchmark Pt/C cathode catalyst. It appears that the presence of the CTO additive promotes the oxygen reduction reaction (ORR) due to the presence of oxygen vacancies as available active sites for oxygen adsorption in the lattice. The increase in power density obtained with the CTO-based electrode, compared with the benchmark Pt/C, was more than 40% at 90°C, reaching a maximum power density close to 120 mW cm−2, which is one of the highest values reported in the literature under similar operating conditions.
Keywords: CaTiO3; oxygen reduction reaction; electrocatalysts; methanol tolerance; DMFC CaTiO3; oxygen reduction reaction; electrocatalysts; methanol tolerance; DMFC
MDPI and ACS Style

Mazzapioda, L.; Vecchio, C.L.; Aricò, A.S.; Navarra, M.A.; Baglio, V. Performance Improvement in Direct Methanol Fuel Cells by Using CaTiO3-δ Additive at the Cathode. Catalysts 2019, 9, 1017.

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