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AuthorIpadeola, Adewale K.
AuthorEid, Kamel
AuthorAbdullah, Aboubakr M.
AuthorOzoemena, Kenneth I.
Available date2023-01-08T08:27:18Z
Publication Date2022
Publication NameLangmuir
AbstractRational synthesis of Co-ZIF-67 metal-organic framework (MOF)-derived carbon-supported metal nanoparticles is essential for various energy and environmental applications; however, their catalytic activity toward carbon monoxide (CO) oxidation in various electrolytes is not yet emphasized. Co-ZIF-67-derived hierarchical porous carbon nanosheet-supported Pd nanocrystals (Pd/ZIF-67/C) were prepared using a simple microwave-irradiation approach followed by carbonization and etching. Mechanistically, during microwave irradiation, triethyleneamine provides abundant reducing gases that promote the formation of Pd nanoparticles/Co-Nxin porous carbon nanosheets with the assistance of ethylene glycol and also form a multimodal pore size. The electrocatalytic CO oxidation activity and stability of Pd/ZIF-67/C outperformed those of commercial Pd/C and Pt/C catalysts by (4.2 and 4.4, 4.0 and 2.7, 3.59 and 2.7) times in 0.1 M HClO4, 0.1 M KOH, and 0.1 M NaHCO3, respectively, due to the catalytic properties of Pd besides the conductivity of Co-Nxactive sites and delicate porous structures of ZIF-67. Notably, using Pd/ZIF-67/C results in a higher CO oxidation activity than Pd/C and Pt/C. This study may pave the way for using MOF-supported multi-metallic nanoparticles for CO oxidation electrocatalysis. 2022 American Chemical Society. All rights reserved.
SponsorThis work was supported by the Qatar University Internal Grant (QUHI-CAM-22/23-550), Qatar National Research Fund (NPRP13S-0117-200095), and NRF/DSI/Wits SARChI Chair in Materials Electrochemistry and Energy Technologies (MEET) (UID No. 132739). The authors are grateful to the Environmental Science Center (ESC), Qatar University for the ICP-OES analysis.
PublisherAmerican Chemical Society
SubjectCarbon monoxide
Catalyst activity
Catalytic oxidation
Ethylene glycol
Metal nanoparticles
Metal-Organic Frameworks
Palladium compounds
Platinum compounds
Pore size
Porous materials
Potassium hydroxide
Synthesis (chemical)
Carbon monoxide oxidation
Carbon nanosheets
Derived carbons
Embedded metals
Hierarchical porous carbons
Metalorganic frameworks (MOFs)
Microwave- irradiations
Oxidation activities
Pd nanoparticles
Rational synthesis
TitlePd-Nanoparticles Embedded Metal-Organic Framework-Derived Hierarchical Porous Carbon Nanosheets as Efficient Electrocatalysts for Carbon Monoxide Oxidation in Different Electrolytes
Issue Number36
Volume Number38

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