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AuthorMatin M.A.
AuthorKumar A.
AuthorBhosale R.R.
AuthorSaleh Saad M.A.H.
AuthorAlmomani F.A.
AuthorAl-Marri M.J.
Available date2022-04-25T08:00:22Z
Publication Date2017
Publication NameRSC Advances
ResourceScopus
Identifierhttp://dx.doi.org/10.1039/c7ra07013f
URIhttp://hdl.handle.net/10576/30340
AbstractHerein, we report the synthesis of PdZn nanoparticle (NP) electrocatalysts for the methanol oxidation reaction (MOR). The PdZn NPs were synthesized by solution combustion synthesis in the presence of Pd(NO3)2·xH2O, Zn(NO3)2·6H2O and glycine in H2O, where glycine acted as a fuel. In this synthesis, the glycine amount was varied with a fixed stoichiometric ratio of Pd- and Zn-precursors at 1 : 1 to obtain two electrocatalysts (PdZn/C) of fuel-high (glycine to metal nitrate ratio = 1.75), PdZn/C (1.75) and fuel-low (glycine to metal nitrate ratio = 0.5), PdZn/C (0.5). The NPs were characterized by X-ray diffractometry, transmission electron microscopy and scanning electron microscopy for the crystallite size, morphology and elemental composition of the electrocatalysts. High-angle annular dark-field-scanning transmission electron microscopy coupled to energy dispersive X-ray spectroscopy was used to obtain the elemental distribution maps of the aggregated NPs, which confirmed the NPs with Pd and Zn in the alloyed state. X-ray photoelectron spectroscopy was performed to analyze the electronic structures of the elements in the samples. The NPs were then applied in the electrocatalysis for MOR in an alkaline medium. We found that PdZn/C showed an improved electrocatalytic activity by a factor of ∼1.4–1.9 in comparison with Pd/C synthesized using the same method. The MOR on PdZn/C (1.75) began at an earlier onset potential and higher current density than for Pd/C and PdZn/C (0.5). Stability tests were performed by chronoamperometry on PdZn/C and Pd/C, and the results showed a higher stability of PdZn/C (1.75) compared to PdZn/C (0.5) and Pd/C. The fuel amount affected the NP sizes, reaction yield and electrocatalytic properties.
SponsorQatar Foundation;Qatar National Research Fund
Languageen
PublisherRoyal Society of Chemistry
SubjectAmino acids
Binary alloys
Chronoamperometry
Combustion synthesis
Crystallite size
Electrocatalysis
Electrocatalysts
Electrolysis
Electron microscopy
Electronic structure
Energy dispersive spectroscopy
Fuels
High resolution transmission electron microscopy
Methanol
Nanoparticles
Nitrates
Palladium
Palladium alloys
Scanning electron microscopy
Strontium compounds
Synthesis (chemical)
Transmission electron microscopy
X ray diffraction analysis
X ray photoelectron spectroscopy
X ray spectroscopy
Zinc
Zirconium alloys
Electrocatalytic activity
Electrocatalytic properties
Elemental compositions
Elemental distribution
Energy dispersive X ray spectroscopy
High-angle annular dark fields
Methanol oxidation reactions
Solution combustion synthesis
Zinc alloys
TitlePdZn nanoparticle electrocatalysts synthesized by solution combustion for methanol oxidation reaction in an alkaline medium
TypeArticle
Pagination42709-42717
Issue Number68
Volume Number7
dc.accessType Abstract Only


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