Spark generation of monometallic and bimetallic aerosol nanoparticles

This paper reports the generation and characterization of monometallic (palladium (Pd), platinum (Pt), gold (Au), and silver (Ag) from electrodes of the same material) and bimetallic (Pd–Pt, Pd–Au, and Pd–Ag from electrodes of different materials) aerosol particles produced using a spark discharge. The Ag, Pd, Pt, and Au monometallic particles were agglomerates with a mean diameter of 14.9, 26.7, 37.7, and 48.8 nm, respectively. The agglomerates consisted of primary particles ranging in size from 2 to 4 nm (Ag