Show simple item record

AuthorOgada, Jimodo J.
AuthorEhirim, Tobechukwu J.
AuthorIpadeola, Adewale K.
AuthorHaruna, Aderemi B.
AuthorMwonga, Patrick V.
AuthorAbdullah, Aboubakr M.
AuthorYang, Xiao Yu
AuthorEid, Kamel
AuthorWamwangi, Daniel M.
AuthorOzoemena, Kenneth I.
Available date2024-05-06T06:59:37Z
Publication Date2024-02-09
Publication NameACS Omega
Identifierhttp://dx.doi.org/10.1021/acsomega.3c04427
CitationOgada, J. J., Ehirim, T. J., Ipadeola, A. K., Haruna, A. B., Mwonga, P. V., Abdullah, A. M., ... & Ozoemena, K. I. (2024). Interfacial Electronic Interactions within the Pd-CeO2/Carbon Onions Define the Efficient Electrocatalytic Ethanol Oxidation Reaction in Alkaline Electrolytes. ACS omega.
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85185312294&origin=inward
URIhttp://hdl.handle.net/10576/54642
AbstractPorous Pd-based electrocatalysts are promising materials for alkaline direct ethanol fuel cells (ADEFCs) and ethanol sensors in the development of renewable energy and point-of-contact ethanol sensor test kits for drunk drivers. However, experimental and theoretical investigations of the interfacial interaction among Pd nanocrystals on supports (i.e., carbon black (CB), onion-like carbon (OLC), and CeO2/OLC) toward ADEFC and ethanol sensors are not yet reported. This is based on the preparation of Pd-CeO2/OLC nanocrystals by the sol-gel and impregnation methods. Evidently, the porous Pd-CeO2/OLC significantly increased membrane-free micro-3D-printed ADEFC performance with a high peak power density (Pmax = 27.15 mW cm-2) that is 1.38- and 7.58-times those of Pd/OLC (19.72 mW cm-2) and Pd/CB (3.59 mW cm-2), besides its excellent stability for 48 h. This is due to the excellent interfacial interaction among Pd, CeO2, and OLC, evidenced by density functional theory (DFT) simulations that showed a modulated Pd d-band center and facile active oxygenated species formation by the CeO2 needed for ethanol fuel cells. Similarly, Pd-CeO2/OLC gives excellent sensitivity (0.00024 mA mM-1) and limit of detection (LoD = 8.7 mM) for ethanol sensing and satisfactory recoveries (89-108%) in commercial alcoholic beverages (i.e., human serum, Amstel beer, and Nederberg Wine). This study shows the excellent possibility of utilizing Pd-CeO2/OLC for future applications in fuel cells and alcohol sensors.
SponsorThis work was financially supported by the National Foundation of Research (NRF), the Department of Science and Innovation (DSI), and the University of the Witwatersrand (Wits) through the DSI-NRF-Wits SARChI Chair in Materials Electrochemistry and Energy Technologies (MEET) (UID No.: 132739). Open Access fee is paid by the University of the Witwatersrand.
Languageen
PublisherAmerican Chemical Society (ACS)
Subjectelectrocatalysts
alcoholic beverages
TitleInterfacial Electronic Interactions within the Pd-CeO2/Carbon Onions Define the Efficient Electrocatalytic Ethanol Oxidation Reaction in Alkaline Electrolytes
TypeArticle
Pagination7439–7451
ESSN2470-1343
dc.accessType Open Access


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record