Atomic layer deposition of Pd nanoparticles on self-supported carbon-Ni/NiO-Pd nanofiber electrodes for electrochemical hydrogen and oxygen evolution reactions - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Journal of Colloid and Interface Science Année : 2020

Atomic layer deposition of Pd nanoparticles on self-supported carbon-Ni/NiO-Pd nanofiber electrodes for electrochemical hydrogen and oxygen evolution reactions

Chrystelle Salameh
Matthieu Weber
Syreina Sayegh
Stéphanie Roualdes
Mikhael Bechelany

Résumé

The most critical challenge in hydrogen fuel production is to develop efficient, eco-friendly, lowcost electrocatalysts for water splitting. In this study, self-supported carbon nanofiber (CNF) electrodes decorated with nickel/nickel oxide (Ni/NiO) and palladium (Pd) nanoparticles (NPs) were prepared by combining electrospinning, peroxidation, and thermal carbonation with atomic layer deposition (ALD), and then employed for hydrogen evolution and oxygen evolution reactions (HER/OER). The best CNF-Ni/NiO-Pd electrode displayed the lowest overpotential (63 mV and 1.6 V at j = 10 mA cm-2), a remarkably small Tafel slope (72 and 272 mV dec-1), and consequent exchange current density (1.15 and 22.4 mA cm-2) during HER and OER, respectively. The high chemical stability and improved electrocatalytic performance of the prepared electrodes can be explained by CNF functionalization via Ni/NiO NP encapsulation, the formation of graphitic layers that cover and protect the Ni/NiO NPs from corrosion, and ALD of Pd NPs at the surface of the selfsupported CNF-Ni/NiO electrodes.
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Dates et versions

hal-03242820 , version 1 (31-05-2021)

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Ahmed Barhoum, Heba H El-Maghrabi, Igor Iatsunskyi, Emerson Coy, Aurélien Renard, et al.. Atomic layer deposition of Pd nanoparticles on self-supported carbon-Ni/NiO-Pd nanofiber electrodes for electrochemical hydrogen and oxygen evolution reactions. Journal of Colloid and Interface Science, 2020, 569, pp.286-297. ⟨10.1016/j.jcis.2020.02.063⟩. ⟨hal-03242820⟩
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