The Ta2O5-modified Pt electrode, which was prepared by electrodeposition of Ta on a Pt electrode from 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) ionic liquid and subsequent calcination, possesses excellent electrocatalytic activity toward the oxidation of formaldehyde to CO2 in 0.5 M H2SO4 solution compared with the bare Pt electrode. This significant improvement in catalytic performance may be attributed to the strong metal–oxide interaction as well as hydroxide spillover effect of the modified electrode. A possible reaction mechanism is proposed.
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Masud et al. (2011) studied this question.
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