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- W2017159757 abstract "Ta modified TiO 2 was synthesized using a sol-gel procedure and evaluated for use as an electrocatalyst support. Of the materials evaluated, Ta 0.3 Ti 0.7 O 2 exhibited remarkably high stability under aggressive potential cycling tests designed to mimic harsh automotive drive cycles. The capacitance of the Ta 0.3 Ti 0.7 O 2 support changed by 12% whereas the pseudocapacitance of a carbon benchmark changed by over 100% under identical test conditions. Pt/Ta 0.3 Ti 0.7 O 2 electrocatalyst prepared by catalyzing this support showed high electrochemical stability which was attributed to a strong metal support interaction (SMSI); and fairly good performance. The stability of the catalyzed supports were evaluated by monitoring the evolution of the electrochemical surface area (ECSA) under potential cycling, loss in ECSA of Pt/Ta 0.3 Ti 0.7 O 2 was found to be 35% compared to 46% for Pt/C over 10,000 load cycles. Pt/Ta 0.3 Ti 0.7 O 2 showed fairly good performance: the electrochemical surface area of this electrocatalyst was 41 m 2 /g, while the mass activity and area-specific activities for the oxygen reduction reaction (ORR) were 62 mA/mg Pt and 151 µA/cm 2 Pt , respectively, as ascertained from electrochemical experiments performed on a rotating disk electrode (RDE). Based on these results, we propose that Ta 0.3 Ti 0.7 O 2 is an excellent corrosion-resistant alternative to carbon as an electrocatalyst support." @default.
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- W2017159757 date "2013-08-31" @default.
- W2017159757 modified "2023-09-29" @default.
- W2017159757 title "Ta Modified TiO<sub>2</sub> Supports Exhibit Exceptional Durability in Polymer Electrolyte Fuel Cells" @default.
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- W2017159757 doi "https://doi.org/10.1149/05801.1823ecst" @default.
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