Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes

TitleMethanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes
Publication TypeJournal Article
Year of Publication2022
AuthorsA. Touni, X. Liu, X. Kang, C. Papoulia, E. Pavlidou, D. Lambropoulou, M.N. Tsampas, A.E. Chatzitakis, S. Sotiropoulos
JournalMolecules
Volume27
Issue19
Pagination6382
Date Published10/2022
Abstract

Optimized Pt-based methanol oxidation reaction (MOR) anodes are essential for commercial direct methanol fuel cells (DMFCs) and methanol electrolyzers for hydrogen production. High surface area Ti supports are known to increase Pt catalytic activity and utilization. Pt has been deposited on black titania nanotubes (bTNTs), Ti felts and, for comparison, Ti foils by a galvanic deposition process, whereby Pt(IV) from a chloroplatinate solution is spontaneously reduced to metallic Pt (at 65 ◦C) onto chemically reduced (by CaH2) TNTs (resulting in bTNTs), chemically etched (HCl + NaF) Ti felts and grinded Ti foils. All Pt/Ti-based electrodes prepared by this method showed enhanced intrinsic catalytic activity towards MOR when compared to Pt and other Pt/Ti-based catalysts. The very high/high mass specific activity of Pt/bTNTs (ca 700 mA mgPt−1 at the voltammetric peak of 5 mV s−1 in 0.5 M MeOH) and of Pt/Ti-felt (ca 60 mA mgPt−1, accordingly) make these electrodes good candidates for MOR anodes and/or reactive Gas Diffusion Layer Electrodes (GDLEs) in DMFCs and/or methanol electrolysis cells.

DOI10.3390/molecules27196382
Division

MaSF

Department

CEPEA

PID

943c76c75778b1ceaef07974e8bb4ea1

Alternate TitleMolecules
LabelOA

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