| http://www.w3.org/ns/prov#value | - Other materials that are expected to be desirably active include the following: alumina promoted by alkali, alkaline earth or metals such as nickel, iron, or noble metals such as platinum, palladium, and rhodium; various zeolites containing cobalt, iron, or copper; mixed oxides such as PbZrO3; and perovskites such as LaFeO3-?? or LaNiO3-??.
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