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The modification of ceria (CeO 2 ) on high surface area cobaltic oxide (Co 3 O 4 ) and the promotion effect of CO oxidation via different pretreatment conditions were studied. The high-valence cobalt oxide was prepared first by precipitation-oxidation in ice bath, followed by reduction at 230°C to get pure and high surface area cobaltic oxide (assigned as R230, S BET ...
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