Electronic perturbation-promoted interfacial pathway for facile C-H dissociation
Interface has often played significant role in the behavior of metal-based catalysts during various heterogeneous reactions.Herein,we reported a novel interfacial pathway for propane dehydro-genation on Pt-GaOx dual sites.The active ensemble,composing Pt particles and Ga2O3 clusters,facilitates the facile dissociation of C-H bonds(energy barrier＜0.30 eV)through H-abstraction by O sites,coupled with alkyl stabilization on the Pt surface.Notably,the electronic perturbation of the Pt slab induces higher-lying O 2p states at the interface,accompanied by a substantial density of states around fermi level.This is in stark contrast to the O species present in Ga2O3 crystals or clus-ters alone,leading to an exceptionally strong affinity for H and a robust ability for C-H scission.The Pt/Ga-Al2O3 catalysts prepared with Pt nanoparticles decorated by Ga oxide exhibit superior per-formance compared to Pt/Al2O3 and PtSn/Al2O3 catalysts.This insight into interfacial catalysis con-tributes to a broader understanding of the origin of the high catalytic efficiency observed in met-al-based catalysts.
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