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AuthorAdewale K., Ipadeola
AuthorSalah, Belal
AuthorGhanem, Alaa
AuthorAhmadaliev, Doniyorbek
AuthorSharaf, Mohammed A.
AuthorAbdullah, Aboubakr M.
AuthorEid, Kamel
Available date2024-05-05T10:40:52Z
Publication Date2023-06-02
Publication NameHeliyon
Identifierhttp://dx.doi.org/10.1016/j.heliyon.2023.e16890
CitationIpadeola, A. K., Salah, B., Ghanem, A., Ahmadaliev, D., Sharaf, M. A., Abdullah, A. M., & Eid, K. (2023). Unveiling the effect of shapes and electrolytes on the electrocatalytic ethanol oxidation activity of self-standing Pd nanostructures. Heliyon, 9(6).
ISSN2405-8440
URIhttps://www.sciencedirect.com/science/article/pii/S2405844023040975
URIhttp://hdl.handle.net/10576/54638
AbstractMorphologically controlled Pd-based nanocrystals are the most efficient strategies for improving the electrocatalytic ethanol oxidation reaction (EOR) performance; however, their morphological-EOR activity relationship and effect of electrolytes at a wide pH range are still ambiguous. Here, we have synthesized porous self-standing Pd clustered nanospheres (Pd-CNSs) and Pd nanocubes (Pd-NCBs) for the EOR in acidic (H2SO4), alkaline (KOH), and neutral (NaHCO3) electrolytes compared to commercial spherical-like Pd/C catalysts. The fabrication process comprises the ice-cooling reduction of Pd precursor by sodium borohydride (NaBH4) and l-ascorbic acid to form Pd-CNSs and Pd-NCBs, respectively. The EOR activity of Pd-CNSs significantly outperformed those of Pd-NCBs, and Pd/C in all electrolytes, but the EOR activity was better in KOH than in H2SO4 and NaHCO3. This is due to the 3D porous clustered nanospherical morphology that makes Pd active centers more accessible and maximizes their utilization during EOR. The EOR specific/mass activities of Pd-CNSs reached (8.51 mA/cm2/2.39 A/mgPd) in KOH, (2.98 mA/cm2/0.88 A/mgPd) in H2SO4, and (0.061 mA/cm2/0.0083 A/mgPd) in NaHCO3, in addition to stability after 1000 cycles. This study affirms that porous 3D spherical Pd nanostructures are preferred for the EOR than those of 0D spherical-like and multi-dimensional cube-like nanostructures.
SponsorThis work was supported by the Qatar University High Impact Internal Grant (QUHI-CAM-22/23-550) and Qatar National Research Fund (NPRP13S-0117-200095).
Languageen
PublisherElsevier
SubjectPd nanocrystals
Pd clustered nanospheres
Pd nanocubes
Ethanol oxidation
The effect of shapes
The effect of electrolytes
TitleUnveiling the effect of shapes and electrolytes on the electrocatalytic ethanol oxidation activity of self-standing Pd nanostructures
TypeArticle
Issue Number6
Volume Number9
Open Access user License http://creativecommons.org/licenses/by/4.0/
ESSN2405-8440
dc.accessType Open Access


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