Abstract:
Electrocatalytic oxidation of ethylene glycol (EG) in alkaline medium using nano-scaled palladium-based
bimetallic catalysts (PdM, where M = Ni and Sn) supported on sulfonated multi-walled carbon nanotubes
(SF-MWCNTs) is compared. The bimetallic mixture (i.e., SF-MWCNT–PdSnmix and SF-MWCNT–PdNimix)
showed better electrocatalysis towards EG oxidation than the SF-MWCNT–Pd. At the SF-MWCNT–
PdSnmix platform, oxidation of EG occurred at lower onset and peak potentials, higher current density,
and faster kinetics (lower impedance) than at the SF-MWCNT–PdNimix platform. EG oxidation at the
SF-MWCNT–PdNimix is more stable than at the SF-MWCNT–PdSnmix. Indeed, Sn is a more favoured cocatalyst
with Pd in EG electro-oxidation.
