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Enhanced activity for ethanol electrooxidation on Pt–MgO/C catalysts |
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| Authors: | Changwei Xu Pei Kang Shen Xinhe Ji Rong Zeng Yingliang Liu |
| Affiliation: | aDepartment of Chemistry, Jinan University, Guangzhou 510632, PR China;bThe State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, 135 Xingang Road, Guangzhou, Guangdong 510275, PR China |
| Abstract: | MgO promoted Pt/C electrocatalysts were rapidly prepared by intermittent microwave heating method and characterized using different techniques. Electrooxidation of ethanol on MgO promoted Pt/C catalysts in alkaline media was studied. Such electrocatalysts are superior to pure Pt electrocatalysts. The influence of the amount of MgO in the catalysts on catalytic activity for ethanol oxidation was tested. The electrode with a weight ratio of Pt to MgO of 4:1 showed the highest electrocatalytic activity for ethanol oxidation. The presence of MgO in the electrocatalysts improved the kinetic processes, giving the exchange current density for ethanol oxidation of 1.8 × 10−5 A cm−2 on Pt–MgO/C instead of 3.3 × 10−7 A cm−2 on Pt/C. |
| Keywords: | Intermittent microwave heating Ethanol oxidation Alkaline MgO Direct methanol fuel cells |
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