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المؤلفIpadeola, Adewale K.
المؤلفEid, Kamel
المؤلفAbdullah, Aboubakr M.
المؤلفAl-Hajri, Rashid S.
المؤلفOzoemena, Kenneth I.
تاريخ الإتاحة2023-01-08T08:27:17Z
تاريخ النشر2022
اسم المنشورNanoscale Advances
المصدرScopus
معرّف المصادر الموحدhttp://dx.doi.org/10.1039/d2na00455k
معرّف المصادر الموحدhttp://hdl.handle.net/10576/38138
الملخصMetal 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.
راعي المشروعThis 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.
اللغةen
الناشرRoyal Society of Chemistry
الموضوعCarbon
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
العنوانPd/Ni-metal-organic framework-derived porous carbon nanosheets for efficient CO oxidation over a wide pH range
النوعArticle
الصفحات5044-5055
رقم العدد23
رقم المجلد4
dc.accessType Open Access


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