Journal
APPLIED SURFACE SCIENCE
Volume 459, Issue -, Pages 105-113Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.07.209
Keywords
Pt/Pd/Co alloy; Hydrogen evolution reaction; Methanol oxidation reaction; High hydrogen production rate
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Funding
- National Operative Programme for Research and Competitiveness 2007-2013, - European Union (Smart Power System Scarl, project leader of the Cluster Energy Environment & Green Chemistry) [PON03_00923]
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A new protocol of synthesis (e.g. choose of the solvent, precursors and amount and type of reducing agents) has been designed to prepare a Pt/Pd/Co alloy with a desired metals ratio. The stability of the alloy has been monitored after an acidic washing, to remove, if present, unalloyed metals and pre-leach the surface. An excellent combination of performance, e.g. Tafel slope lower than 30 mV/dec and a negligible overpotential, were measured for our Pt/Pd/Co NPs, with an atomic ratio (7:3:3) in a flow system. Very high hydrogen production rate of 7.09 mL cm(-2)h(-1) at -0.05 V was measured. The electrochemical production of hydrogen from liquid methanol in acidic solution was also investigated. The Pt/Pd/Co NPs exhibit an anodic current density of 560 mA/mgp, during methanol oxidation in acidic solution at 0.45 V and an I-f/I-b ratio of 1.96. A quantitative evaluation of the performance of the electrode in the two different processes has been made, too.
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