Synthesis and characterization of core-shell structured M@Pd/SnO2-graphene [M = Co, Ni or Cu] electrocatalysts for ethanol oxidation in alkaline solution
Author's Department
Physics Department
Second Author's Department
Physics Department
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https://pubs.rsc.org/en/content/articlelanding/2018/nj/c8nj01078a#!divAbstract
Document Type
Research Article
Publication Title
New Journal of Chemistry
Publication Date
1-1-2018
doi
10.1039/c8nj01078a
Abstract
Core-shell structured M@Pd/SnO2-graphene (Gr), [M = Co, Ni or Cu] electrocatalysts were synthesized using ethylene glycol as a reducing agent with the aid of microwave irradiation in a two-step process. XRD, TEM and EDX analysis techniques were employed to physically characterize the prepared electrocatalysts. They revealed the formation of SnO2-Gr as a support, surrounded by M as a core that was coated with Pd as a shell. The M@Pd/SnO2-Gr electrocatalysts showed a gradual negative shift of their Pd(111) and Pd(200) diffraction peaks when compared to those in the XRD pattern of Pd/Gr. Cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy were employed to investigate the electrocatalytic activity of the prepared electrocatalysts for ethanol oxidation in NaOH solution. Increased ECSA values were recorded at the M@Pd/SnO2-Gr electrocatalysts, especially Cu@Pd/SnO2-Gr [467.49 m2 g-1] in relation to that at Pd/Gr. The presence of cobalt, nickel or copper in the M@Pd/SnO2-Gr electrocatalyst improved the ethanol oxidation mass activity of Pd/Gr by 4.42, 4.78 or 5.84, respectively. A chronoamperometry test demonstrated enhanced electrochemical durability for the fabricated core-shell structured electrocatalysts. Lowered charge transfer resistance values were also measured at these electrocatalysts during the ethanol oxidation reaction. Based on the results in previous reports, core-shell structured Cu@Pd/SnO2-Gr is a potentially valuable electrocatalyst for fuel cell applications.
First Page
6144
Last Page
6160
Recommended Citation
APA Citation
Fahim, A. E.
&
Allam, N. K.
(2018). Synthesis and characterization of core-shell structured M@Pd/SnO2-graphene [M = Co, Ni or Cu] electrocatalysts for ethanol oxidation in alkaline solution. New Journal of Chemistry, 42(8), 6144–6160.
10.1039/c8nj01078a
https://fount.aucegypt.edu/faculty_journal_articles/431
MLA Citation
Fahim, Ahmed, et al.
"Synthesis and characterization of core-shell structured M@Pd/SnO2-graphene [M = Co, Ni or Cu] electrocatalysts for ethanol oxidation in alkaline solution." New Journal of Chemistry, vol. 42,no. 8, 2018, pp. 6144–6160.
https://fount.aucegypt.edu/faculty_journal_articles/431