Synergistic effect of Pd single atoms and nanoparticles deposited on carbon supports by ALD boosts alkaline hydrogen evolution reaction

• DOI: 10.1016/j.cej.2024.148959
• Publication Date: 2024-01-21T15:09:18Z
• Authors: Bilal Bawab; Sitaramanjaneya M...; Eva Kolíbalová; Raul Zazpe; Ludek Jelinek; Jhonatan Rodrigue...; Jan M. Macak
• Keywords: Overpotential; Carbon fibers; Noble metal

The synergistic effects between carbon supports and noble metal species of an electrocatalyst are known to effectively boost the alkaline hydrogen evolution reaction (HER). Herein, Atomic Layer Deposition (ALD) was employed decorate papers with Pd comprising single atoms (SAs) nanoparticles (NPs). Transmission electron microscopy analysis revealed metallic nature coexistence as SAs NPs. results X-ray photoelectron spectroscopy supported evidenced SA species, manifested Pd+2. An increase in electrochemical active surface area from 12.98 413.48 cm−2 increasing ALD cycles 30 300c remained unchanged until 600c Pd. exceptional overpotential for CP exhibits lowest value 4.55 mV, compared previous reports electrocatalysts a non-acidic environment, confirms effect NPs that plays major role enhancing HER.