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US 2014/0193746 A1Published application
Cost-effective core-shell catalyst with high electrochemical stability
AssigneesToyota Motor Europe, Ilika Technologies Limited
InventorsIsotta Cerri, Tetsuo Nagami, Brian Elliott Hayden, Jonathan Conrad Davies
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Abstract
The present invention concerns a core-shell composite material comprising: a core consisting of Nb-doped TiO2 of formula TiNbOx; and a shell consisting of a homogeneous layer of Pt or Pt alloy of 1 to 50 ML in thickness. The core-shell composite material may in particular find application in fuel cells.
Claims22
A core-shell composite material comprising:
- a core consisting of Nb-doped TiO2 of formula TiNbOx;
- and
- a shell consisting of a homogeneous layer of Pt or Pt alloy of 1 to 50 ML in thickness.
Process for the preparation of a core-shell composite material comprising the steps of:
- (1) preparation of a TiNbOx core, which may be in the form of a thin film or a (nano)particle;
- (2) chemical reduction of the surface of the TiNbOx core;
- (3) deposit of a homogeneous layer of platinum or platinum alloy on the reduced surface of the TiNbOx core obtained in step (2).
Dependencies are inferred from the claim text.