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采用多元醇法制备了不同原子比例和载量的PtSnRu/C催化剂,利用透射电镜和X射线光电子能谱表征了所制备催化剂的物化性能,采用直接乙醇燃料电池(DEFC)单池性能测试了其电化学性能,并利用电化学原位光谱、气相色谱和中和滴定分析了乙醇电氧化过程和产物.DEFC单电池测试表明Pt2.6Sn1Ru0.4/C催化剂具有较高的电池性能,其中,以60 wt%Pt2.6Sn1Ru0.4/C催化剂为阳极的DEFC性能最高,90 oC下最高功率密度为121 mW/cm2.电化学原位红外光谱和阳极产物分析表明乙酸、乙醛、乙酸乙酯和CO2是乙醇电化学氧化产物,Pt2.6Sn1Ru0.4/C催化剂上乙醇的氧化效率较高.阳极乙醇氧化活化能和催化剂表面组成分析结果表明,表面组成的相互作用使Pt2.6Sn1Ru0.4/C催化剂具有较低的乙醇氧化活化能和较高的乙醇氧化活性.
The PtSnRu / C catalysts with different atomic ratios and loadings were prepared by the polyhydric alcohol method. The physicochemical properties of the prepared catalysts were characterized by transmission electron microscopy and X-ray photoelectron spectroscopy. The properties of single-cell direct-cell fuel cell (DEFC) Electrochemical performance, and the use of electrochemical in situ spectroscopy, gas chromatography and neutralization titration analysis of ethanol electrooxidation process and product.DEFC battery test showed that Pt2.6Sn1Ru0.4 / C catalyst has a higher battery performance, in which, to The highest DEFC performance of 60 wt% Pt2.6Sn1Ru0.4 / C catalyst was at the anode with a maximum power density of 121 mW / cm2 at 90 ° C. Electrochemical in-situ IR and anodic product analysis indicated that acetic acid, acetaldehyde, ethyl acetate and The oxidation efficiency of ethanol on Pt2.6Sn1Ru0.4 / C catalyst was higher than that of ethanol on the surface of Pt2.6Sn1Ru0.4 / C catalyst.The results of the activation energy of the anode ethanol and the analysis of the surface composition of the catalyst show that the interaction of the surface composition makes the Pt2.6Sn1Ru0.4 / C The catalyst has lower ethanol oxidation activation energy and higher ethanol oxidation activity.