Abstract
We synthesized Pd-Fe series nanoparticles in solid solution using pulsed plasma in liquid with Pd-Fe bulk mixture electrodes. The Pd-Fe atomic percent ratios were 1:3, 1:1, and 3:1, and the particle size was measured to be less than 10 nm by high-resolution transmission electron microscopy (HR-TEM). The nanoparticles showed face-centered cubic structure. The lattice parameter increased with increasing Pd content and followed Vegard’s law, and energy-dispersive X-ray spectra were consistent with the ratios of the starting samples, which showed a solid solution state. The solid solution structure and local structure were confirmed by HR-TEM and X-ray absorption fine structure.
Highlights
Pd is well-known as a hydrogen storage metal [1,2,3]
Our previous studies have shown that pulsed plasma in liquid (PPL) is a good alternative method for synthesizing various nanomaterials [8]
We expect that using melted Pd-Fe bulk electrodes will yield Pd-Fe solid solution nanoparticles because Pd and Fe ions exist in the environment of the pulsed plasma, so Pd-Fe clusters may form
Summary
Pd is well-known as a hydrogen storage metal [1,2,3]. Pd-Fe alloy can be used to catalyze fuel cells and improve their conversion of chemical to electric energy. Pd-Fe alloy nanoparticles may increase the conversion rate of fuel cells. Our previous studies have shown that pulsed plasma in liquid (PPL) is a good alternative method for synthesizing various nanomaterials [8]. This process is relatively cheap and environmentally friendly. We seek to synthesize Pd-Fe alloy nanoparticles with atomic percent ratios of 1:3, 1:1, and 3:1 using PPL with Pd-Fe bulk mixture electrodes of the same composition. We expect that using melted Pd-Fe bulk electrodes will yield Pd-Fe solid solution nanoparticles because Pd and Fe ions exist in the environment of the pulsed plasma, so Pd-Fe clusters may form.
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