CeO2 promoted Au/C catalyst for glycerol electro-oxidation in alkaline medium

Glycerol has a very high value of onset potential on the Au/C, so it is difficult to be electrochemically oxidized on pure Au electrocatalyst. When CeO2 is added to the Au/C, the value of onset potential is more 190 mV shifted negatively and close to that on the E-TEK Pt/C. The results demonstrate that CO remarkably poisons the Pt/C catalyst and CO is a promoter for glycerol oxidation on the Au/C and Au-CeO2/C electrodes. In presence of CO, a current promotion from 7.5 mA cm(-2) to 15.0 mA cm(-2) on the Au-CeO2/C electrode, then the current slow decays to the same current without CO. The results show that Au CeO2/C has great anti-poisoning effect on CO and is more stable catalyst than the E-TEK Pt/C for glycerol oxidation in presence of CO. (C) 2015 Energy Institute. Published by Elsevier Ltd. All rights reserved.