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AuthorIpadeola, Adewale K.
AuthorEid, Kamel
AuthorAbdullah, Aboubakr M.
AuthorAl-Hajri, Rashid S.
AuthorOzoemena, Kenneth I.
Available date2023-01-08T08:27:17Z
Publication Date2022
Publication NameNanoscale Advances
ResourceScopus
URIhttp://dx.doi.org/10.1039/d2na00455k
URIhttp://hdl.handle.net/10576/38138
AbstractMetal nanocrystal ornamented metal–organic frameworks (MOFs) are of particular interest in multidisciplinary applications; however, their electrocatalytic CO oxidation performance over wide pH ranges is not yet reported. Herein, Ni-MOF-derived hierarchical porous carbon nanosheets (Ni-MOF/PC) with abundant Ni–Nx sites decorated with Pd nanocrystals (Pd/Ni-MOF/PC) were synthesized by microwave-irradiation (MW-I) followed by annealing at 900 °C and subsequent etching of Ni-MOF/C prior to Pd deposition. The fabrication mechanism comprises the generation of self-reduced reducing gases from triethylamine during the annealing and selective chemical etching of Ni, thereby facilitating the reduction of Ni-anchored MOF and Pd nanocrystal deposition with the aid of ethylene glycol and MW-I to yield Pd/Ni–Nx enriched MOF/PC. The synthetic strategies endear the Pd/Ni-MOF/PC with unique physicochemical merits: abundant defects, interconnected pores, high electrical conductivity, high surface area, Ni-deficient but more active sites for Pd/Ni–Nx in porous carbon nanosheets, and synergism. These merits endowed the CO oxidation activity and stability on Pd/Ni-MOF/PC substantially than those of Pd/Ni-MOF/C and Pd/C catalysts in wide pH conditions (i.e., KOH, HClO4, and NaHCO3). The CO oxidation activity study reveals the utilization of MOF/PC with metal nanocrystals (Pd/Ni) in CO oxidation catalysis.
SponsorThis work was supported by the Qatar University High Impact Internal Grant (QUHI-CAM-22/23-550), Qatar National Research Fund (NPRP13D-0117-200095) and NRF/DSI/Wits SARChi Chair in Materials Electrochemistry and Energy Technologies (MEET) (UID No. 132739). The statements made herein are solely the responsibility of the authors. The authors are grateful to the Environmental Science Center (ESC), Qatar University, for the ICP-OES analysis.
Languageen
PublisherRoyal Society of Chemistry
SubjectCarbon
Deposition
Etching
Ethylene
Ethylene glycol
Microwave irradiation
Morphology
Nanosheets
Nickel compounds
Oxidation
Palladium
Palladium compounds
pH
Porous materials
Potassium hydroxide
Carbon nanosheets
Hierarchical porous carbons
Metal nanocrystals
Metalorganic frameworks (MOFs)
Microwave- irradiations
Ni metal
Oxidation activities
Pd nanocrystals
Porous carbons
Wide pH range
Organometallics
TitlePd/Ni-metal-organic framework-derived porous carbon nanosheets for efficient CO oxidation over a wide pH range
TypeArticle
Pagination5044-5055
Issue Number23
Volume Number4
dc.accessType Open Access


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