Investigating electrochemical behaviors of Ag@Pt core-shell nanoparticles supported upon carbon materials acting as PEMFC's cathodes

摘要

In order to obtain a clean and environmentally friendly power source, an electrically based energy-producing device seemed crucial. Amongst green power sources, proton exchange membrane fuel cells (PEMFCs) resulted in significant extent of research making them one of the most propitious alternative energy devices in stationary and mobile systems. Considerable research focused upon reducing cost of the oxygen reduction reaction (ORR) reaction through applying Pt while enhancing durability of such systems. Core-shell nanoparticles considered innovative structures utilized in PEM fuel cells due to their remarkable properties. These included enhanced catalytic activities; improved charge transfer behaviour, higher activation energies and decreased cost through using less Pt. In this venue Ag@Pt core-shell nanoparticle (NP) structures dispersed on different carbon base supports such as; graphene oxide (GO), multiwall carbon nanotubes (MWCNT) and carbon black applied to the ORR in a PEMFC. These were synthesized by the ultrasonic treatment method. In previous investigations of these authors [1,2] and Yu et al. [3] the Ag@Pt Core-Shell electrocatalyst understudied with Ag:Pt mass ratio of 1:3 revealed possessing the largest electrochemical surface area and highest stability amongst all other synthesized Ag:Pt ratios. The morphology of as-prepared catalysts characterized by the high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) analyses emphasized the Core-Shell structure of the Ag@Pt nanoparticles prepared. The lattice parameter (a_(fcc)) and average crystallite size values calculated for these materials and the outcomes tabulated in Table 1.