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AuthorBelal, Salah
AuthorIpadeola, Adewale K.
AuthorKhan, Aslam
AuthorLu, Qingqing
AuthorIbrahim, Yassmin
AuthorDarboe, Ebrima L
AuthorAbdullah, Aboubakr M.
AuthorEid, Kamel
Available date2024-05-05T08:00:49Z
Publication Date2023-10-31
Publication NameEnergy Conversion and Management: X
Identifierhttp://dx.doi.org/10.1016/j.ecmx.2023.100449
CitationSalah, B., Ipadeola, A. K., Khan, A., Lu, Q., Ibrahim, Y., Darboe, E. L., ... & Eid, K. (2023). Unveiling the electrochemical CO oxidation activity on support-free porous PdM (M= Fe, Co, Ni) foam-like nanocrystals over a wide pH range. Energy Conversion and Management: X, 20, 100449.
ISSN2590-1745
URIhttps://www.sciencedirect.com/science/article/pii/S2590174523001058
URIhttp://hdl.handle.net/10576/54611
AbstractBinary PdM-based nanocrystals are efficient electrocatalysts for a wide range of renewable and green fuel cell applications; however, their poisoning by CO is a great barrier for commercialization, so it is pivotal to solve this issue. Herein, we fabricated support-free PdM alloys (M = Fe, Co, and Ni) by a prompt one-step aqueous-solution co-reduction with sodium borohydride driven by the coalescence growth mechanism. This forms support-free PdM porous foam-like nanostructures with well-defined compositions from the ICP-OES analysis and clean surface without any hazardous chemicals or multiple reaction steps. The as-prepared PdM foam-like nanostructures were demonstrated for carbon monoxide oxidation (COOxid) electrocatalysis at varied electrolyte pH compared with commercial Pd/C catalyst. The foam-like PdFe nanocrystals achieved an excellent electrochemical COOxid activity that was at least 2.18-times of PdCo, 4.35-times of PdNi, and 1.56-times of Pd/C in both alkaline (KOH) and acidic (HClO4) electrolytes, but PdCo was the best in neutral (NaHCO3) medium. The superior activity of PdM is due to the strain and alloying effect, which promoted the superb CO oxidation durability for 1000 cycles than Pd/C catalyst. This study demonstrated the superiority of support-free bimetallic PdM alloys than Pd/C catalyst in all electrolytes, which may open new gates for understanding CO-poisoning in alcohol-based fuel cells.
SponsorThis work is supported by the Qatar University High Impact Internal Grant [QUHI-CAM-22/23-550] and Qatar National Research Fund [NPRP13S-0117-200095]. It is also supported by the Researchers Supporting Project number (RSP2023R127), King Saud University, Riyadh, Saudi Arabia. Open access funding is provided by the Qatar National Library.
Languageen
PublisherElsevier
SubjectBinary PdM nanocrystals
Porous Pd-based catalysts
Electrocatalytic carbon monoxide oxidation
Alcohol fuel cell
Electrocatalysts
CO-poisoning
TitleUnveiling the electrochemical CO oxidation activity on support-free porous PdM (M = Fe, Co, Ni) foam-like nanocrystals over a wide pH range
TypeArticle
Volume Number20
Open Access user License http://creativecommons.org/licenses/by/4.0/
ESSN2590-1745
dc.accessType Open Access


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