Polyol-synthesized Pt2.6Sn1Ru0.4/C as a high-performance anode catalyst for direct ethanol fuel cells

doi:10.1016/S1872-2067(14)60063-2

Abstract

Abstract:

PtSnRu/C catalysts with different atomic ratios and metal loadings were prepared using a polyol process to improve the performance of direct ethanol fuel cells (DEFCs). The catalysts were characterized using transmission electron microscopy and X-ray photoelectron spectroscopy. The DEFC performance was evaluated using a single-cell test. The ethanol electro-oxidation process and anode products were analyzed using in situ Fourier-transform infrared spectroscopy (FTIRS), gas chromatography, and neutralization titration. The performance of the Pt_2.6Sn₁Ru_0.4/C catalyst was better than those of the Pt₃Sn₁/C and Pt₂Sn₁Ru₁/C catalysts. The carbon-supported Pt_2.6Sn₁Ru_0.4 catalyst with a 60 wt% metal loading gave a maximum power density of 121 mW/cm² at 90 ℃. In situ FTIRS and anode product analysis indicated that ethanol was electro-oxidized to acetaldehyde, acetic acid, ethyl acetate, and CO₂. The ethanol oxidation efficiency on the Pt_2.6Sn₁Ru_0.4/C catalyst was higher than that on the Pt₃Sn₁/C catalyst. The activation energy of ethanol electro-oxidation at the anode and surface composition analysis indicated that interactions among the surface elements resulted in a lower apparent activation energy and greater ethanol electro-oxidation efficiency on the Pt_2.6Sn₁Ru_0.4/C catalyst.

Key words: Direct ethanol fuel cell, Anode catalyst, Polyol method, Anode product, Ethanol oxidation efficiency

Qi Wang, Xing Lu, Qin Xin, Gongquan Sun. Polyol-synthesized Pt_2.6Sn₁Ru_0.4/C as a high-performance anode catalyst for direct ethanol fuel cells[J]. Chinese Journal of Catalysis, 2014, 35(8): 1394-1401.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(14)60063-2

https://www.cjcatal.com/EN/Y2014/V35/I8/1394

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Polyol-synthesized Pt_2.6Sn₁Ru_0.4/C as a high-performance anode catalyst for direct ethanol fuel cells

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