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

卷:569

Article

Barhoum, Ahmed^1,2  El-Maghrabi, Heba H.^2,3  Iatsunskyi, Igor⁴  Coy, Emerson⁴  Renard, Aurelien⁵  Salameh, Chrystelle²  Weber, Matthieu²  Sayegh, Syreina²  Nada, Amr A.^2,6  Roualdes, Stephanie²  Bechelany, Mikhael² 

[1] Helwan Univ, Fac Sci, Chem Dept, Ain Helwan, Cairo 11795, Egypt

[2] Univ Montpellier, IEM, CNRS, ENSCM,UMR 5635, Pl Eugene Bataillon, F-34095 Montpellier, France

[3] Egyptian Petr Res Inst, Dept Refining, PB 11727, Nasr City, Egypt

[4] Adam Mickiewicz Univ, NanoBioMed Ctr, 3 Wszechnicy Piastowskiej Str, PL-61614 Poznan, Poland

[5] Univ Lorraine, CNRS, UMR 7564, LCPME, 405 Rue Vandoeuvre, F-54600 Villers Les Nancy, France

[6] Egyptian Petr Res Inst, Dept Anal & Evaluat, PB 11727, Nasr City, Egypt

关键词: Self-supported electrodes;    Nickel-palladium catalysts;    Carbon nanofiber;    Electrospinning;    Atomic layer deposition;    Hydrogen and oxygen evolution reactions;   

DOI  :  10.1016/j.jcis.2020.02.063

来源: Elsevier

【 摘 要 】

The most critical challenge in hydrogen fuel production is to develop efficient, eco-friendly, low-cost elec-trocatalysts 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 self-supported CNF-Ni/NiO electrodes. (C) 2020 Elsevier Inc. All rights reserved.

【 授权许可】

Free