Journal
ELECTROCATALYSIS
Volume 10, Issue 4, Pages 366-380Publisher
SPRINGER
DOI: 10.1007/s12678-019-00518-5
Keywords
MOF-derived carbon; Pd; SnO2 nano-electrocatalysts; Microwave-assisted synthesis methods; Ethanol oxidation reaction; Tafel slope; Electrochemical impedance spectroscopy
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Funding
- Department of Science and Technology (DST)
- National Research Foundation (NRF)
- World Academy of Science (TWAS)
- University of the Witwatersrand (Wits)
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Bimetallic Pd/SnO2 nanoparticle electrocatalysts on metal organic framework-derived carbon (MOFDC) were successfully synthesized using microwave-assisted strategies and explored for ethanol oxidation reaction (EOR) in alkaline solution. The materials were thoroughly characterized using XRD, XPS, TEM, and Raman. TEM showed that Pd/SnO2/MOFDC gave the least average particle size of 5.5nm compared to its counterparts on carbon black (CB). The Pd/SnO2/MOFDC gave the best electrocatalytic performance in terms of high electrochemical active surface area (ECSA) of 962cm(2)mg(-1), low onset potential and overpotential for EOR, and high current density (j) of four times more than those of the Pd/CB electrocatalyst. In addition, Pd/SnO2/MOFDC showed superior kinetic parameter (in terms of the Tafel slope (b)=216.18mVdec(-1)) and least combined resistance (R=R-s+R-ct). These results show that the Pd/SnO2/MOFDPC nanoparticle electrocatalyst is promising for EOR with improved electrocatalytic properties for application in direct ethanol fuel cell (DEFC).
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