Journal
RENEWABLE ENERGY
Volume 120, Issue -, Pages 209-219Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2017.12.077
Keywords
Trititanium pentoxide; Molybdenum doping; Carbon-free Pt cathode catalyst; Nafion (R) 115; MEA
Funding
- Italian Ministry of Education, University and Research (Italian project PRIN CYTWAW NAMEDPEM)
- Spanish Ministry of Economy and Competitiveness [ENE2014-52158-C2-2R]
- FEDER
- Viera y Clavijo program (ACIISI ULL)
- Canary Government (ACIISI)
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In this study, an innovative carbon-free electrocatalyst for oxygen reduction reaction was synthesized via deposition of platinum on titanium nanotube suboxide (trititanium pentoxide nanotubes, TNTS) obtained from titania doped with molybdenum (Pt/TNTS-Mo). The TNTS-Mo support was synthesized in autoclave, while the Pt/TNTS-Mo using the polyol method. The carbon-free support and the Pt-based catalyst were fully characterized via rotating disk electrode (RDE) technique and polymer exchange membrane fuel cell (PEMFC) station by preparing a membrane electrode assembly (MEA) with Nafion (R) 115, loaded with 0.35 mg(pt) cm(-2) of Pt/TNTS-Mo at the cathode, and 035 mgpt cm-2 of commercial Pt/C (E-TEK) at the anode. In RDE experiments, the Pt/TNTS-Mo exhibited low overpotential and remarkable electroactivity toward oxygen reduction reaction (ORR: mass activity of 110.7 mA mg(Pt)(-1) at 0.9 V vs SHE). Moreover, the Pt/TNTS-Mo demonstrated excellent stability. Tests in a 25 cm(2) single cell PEMFC resulted to maximum power density of 0.52 W cm(-2). (C) 2017 Elsevier Ltd. All rights reserved.
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