Abstract
The nonstoichiometric metal oxide Ni0.3 Co2.7 O4 served as a support for small-sized Pt nanoparticles. The whole synthesis of the hybrid material can be kinetically controlled and no further surface-modification treatment was required. More importantly, the as-obtained strongly coupled PtNi0.3 Co2.7 O4 hybrid nanoflowers exhibit remarkably enhanced catalytic activities compared with PtNiO and PtCo3 O4 hybrid samples. This result indicates that it is possible to optimize the catalytic performance of noble metals by using a nonstoichiometric metal oxides as a support instead of a stoichiometric metal oxide.
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