1 research outputs found
Complex Alloy and Heterostructure Nanoparticles Derived from Perovskite Oxide Precursors for Catalytic Dry Methane Reforming
We have developed a general route for combining Ni, Fe,
Co, Cu,
and Pd in a nanoparticle using the exsolution mechanism from LaFe0.7Ni0.1Co0.1Cu0.05Pd0.05O3 perovskite oxide precursors. The strong adherence
of the nanoparticles to the support yields attractive catalytic properties
for dry methane reforming, such as coke resistance and thermal sintering
suppression. The reduction of the precursors at 700 and 900 °C
yielded NiCoCuPd or NiFeCoCuPd nanoparticles with a size-dependent
phase transition from a complex concentrated alloy to phase-separated
heterostructures. Our findings indicate that smaller concentrated
alloy nanoparticles (∼10 nm) are more effective for methane
activation than larger (>20 nm) phase-separated nanoparticles