Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 7, Pages 2425-2430Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am200330b
Keywords
palladium; monodispersed nanoparticle; porous sphere-like aggregates; reaction atmosphere; electrocatalyst; methanol oxidation
Funding
- Ministry of Science and Technology of China [2010CB933504]
- Science Funds for Distinguished Young Scientists of Shandong Province [JQ200903]
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Monodispersed Pd nanoparticles and their porous sphere-like aggregates with different lattice parameters were solvothermally prepared under nitrogen and air atmospheres. Here PdCl2 acted as Pd precursor and hexadecylamine played the roles of solvent, reductant, and surface capping agent. Oxygen existing in air resulted in the change of surface capping agent, which then induced the aggregation of Pd nanoparticles, and the incorporation of oxygen led to the expansion of its lattice parameter to 0.393 nm, whereas the standard lattice parameter in metallic Pd is 0.389 nm. The monodispersed nanoparticles presented better catalytic activity and stability for the oxidation of methanol than the sphere-like Pd aggregates.
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