Zhiyou Zhou, Qiang Wang, Jian-Long Lin
Nov 30, 2010
Citations
2
Influential Citations
190
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Journal
Electrochimica Acta
Abstract
Electrooxidation of ethanol on a polycrystalline Pd disk electrode in alkaline media was studied by in situ Fourier transform infrared (FTIR) reflection spectroscopy. The emphasis was put on the quantitative determination of intermediates and products involved in the oxidation. It has revealed that most of ethanol was incompletely oxidized to acetate. The selectivity for ethanol oxidation to CO 2 (existing as CO 3 2― in alkaline media) was determined as low as 2.5% in the potential region where Pd electrode exhibited considerable electrocatalytic activity (-0.60 to 0.0 V vs. SCE). Nevertheless, the ability of Pd for breaking C-C bond in ethanol is still slightly better than that of Pt under the same conditions. Besides, a very weak band of adsorbed intermediate, bridge-bonded CO (CO B ) was identified on the Pd electrode for the first time, suggesting that CO 2 and CO 3 2― species may also be generated through CO pathway (i.e., indirect pathway).