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- W2594927241 abstract "The growth of a promising material system for high-temperature polymer-electrolyte-membrane fuel cells, namely, platinum (Pt) loaded tungsten suboxide (WO3–x) electrodes, has been studied in-depth. The template-free two-step synthesis results in highly porous three-dimensional networks of crystalline Pt nanorods on the WO3–x support. The formation and growth behavior of these catalyst morphologies are investigated as a function of the deposition time of the catalyst precursor by use of scanning electron microscopy and various transmission electron microscopy techniques. The analysis reveals that octahedral-shaped bulk crystals of the Pt-precursor are formed on the WO3–x support, which subsequently reduce during the thermal treatment. After a reduction time of 4 min, the core of the catalyst morphologies is still bulk material, composed of Pt nanoparticles embedded in a reduced form of the Pt precursor, while the outer shell is formed by a porous network of polycrystalline Pt. Electron tomography helps to reveal the connectivity of the Pt network and allows calculation of the surface area of a 100 nm × 100 nm portion. This is compared to the macroscopic value for the surface area of the samples’ entire network obtained by cyclic voltammetry." @default.
- W2594927241 created "2017-03-16" @default.
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- W2594927241 date "2017-03-10" @default.
- W2594927241 modified "2023-10-02" @default.
- W2594927241 title "Growth of Porous Platinum Catalyst Structures on Tungsten Oxide Support Materials: A New Design for Electrodes" @default.
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- W2594927241 doi "https://doi.org/10.1021/acs.cgd.6b01663" @default.
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