Method for fabricating precipitated metal nanoparticles on perovskite stannate support with high electrical conductivity

摘要

In -situ elution of metal nanoparticles is emerging as an alternative technique for delivering thermally stable and uniformly dispersed metal nanoparticles, which are conductive perovskite oxide supports. It shows excellent adhesion with The present disclosure discloses that Ni metal nanoparticles with high areal density (~ 175 μ m −2 ) and fine size (~ 38.65 nm) are A-site-deficient perovskite stannate supports (La 0.2 Ba 0.7 Sn 0.9 Ni 0.1 O 3-δ (LBSNO))). Nanoparticles are strongly immobilized and impart coking resistance, and Ni-eluted stannate exhibits very high electrical conductivity (~ 700 S·cm −1 ). The very good electrical conductivity results from conduction between delocalized Sn 5 s orbitals and structural improvements to the ABO 3 stoichiometry of the stannate support. Furthermore, we revealed that the experimental conditions with strong interactions should be optimized to obtain Ni elution without degrading the perovskite stannate backbone. The present disclosure proposes a unique process leading to the formation of metal nanoparticles embedded in stannates with excellent electrical properties.