Abstract
Magneli phase titanium suboxide, Ti n O2n − 1, with Brunauer–Emmett–Teller surface area up to 25 m2 g−1 was prepared using the heat treatment of titanium oxide (rutile) mixed with polyvinyl alcohol in ratios from 1:3 to 3:1. XRD patterns showed Ti4O7 as the major phase formed during the heat treatment process. The Ti n O2n − 1 showed excellent electrochemical stability in the potential range of −0.25 to 2.75 V vs. standard hydrogen electrode. The Ti n O2n − 1 was employed as a polymer electrolyte membrane fuel cell catalyst support to prepare 20 wt% platinum (Pt)/Ti n O2n − 1 catalyst. A fuel cell membrane electrode assembly was fabricated using the 20 wt% Pt/Ti n O2n − 1 catalyst, and its performance was evaluated using H2/O2 at 80 °C. A current density of 0.125 A cm−2 at 0.6 V was obtained at 80 °C.
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