HIGH TEMPERATURE COMBUSTION CATALYST

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A supported precious metal catalyst is described for the high-temperature combustion of a hydrocarbon comprising 1-10% by weight in total of one or more precious metals on a refractory metal oxide support material, further comprising1-20% by weight in total of one or more stabilising metals selected from rare earths and Groups IA, IIA, and IIIA of the periodic table of the elements, wherein at least part of the precious metal is present as a mixed metal oxide with one or more of said stabilising metals.