Abstract
The different behaviors of PdAu/C catalysts in the electrocatalytic oxidation of propane-1,3-diol and propane-1,2-diol in alkaline solution are investigated. The PdAu/C catalysts are prepared by means of the chemical co-deposition of Pd and Au on carbon black and characterized by instrumental analysis and electrochemical analysis. In propane-1,3-diol oxidation on the PdAu/C catalysts, the oxidation potential is similar to that on the Pd/C catalyst rather than that on the Au/C catalyst, but the peak current density is higher than that on Pd/C and Au/C catalysts. Furthermore, the peak current density increases with increasing Au content. The PdAu/C catalysts also show enhanced resistance to the poisoning. However, the improvement in the activity of Pd by the addition of Au and the difference in the activity of the PdAu/C catalysts with different Pd/Au compositions in propane-1,2-diol oxidation are not as obvious as that in propane-1,3-diol oxidation.
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