Support morphology-dependent alloying behaviour and interfacial effects of bimetallic Ni-Cu/CeO₂ catalysts.

ABSTRACT: The impregnation method is commonly employed to prepare supported multi-metallic catalysts but it is often difficult to achieve homogeneous and stable alloy structures. In this work, we revealed the dependence of alloying behavior on the support morphology by fabricating Ni-Cu over different shaped CeO₂. Specifically, nanocube ceria favoured the formation of monometallic Cu and Ni-rich phases whereas polycrystalline and nanorod ceria induced the formation of a mixture of Cu-rich alloys with monometallic Ni. Surprisingly, nanopolyhedron (NP) ceria led to the generation of homogeneous Ni-Cu nanoalloys owing to the equivalent interactions of Ni and Cu species with CeO₂ (111) facets which exposed relatively few coordinative unsaturated sites. More importantly, a strong in

SUBMITTER: Liu Y 

PROVIDER: S-EPMC6432614 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature