多元醇法合成的Pt2.6Sn1Ru0.4/C用作直接乙醇燃料电池高性能阳极催化剂

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

催化学报 ›› 2014, Vol. 35 ›› Issue (8): 1394-1401.DOI: 10.1016/S1872-2067(14)60063-2

多元醇法合成的Pt_2.6Sn₁Ru_0.4/C用作直接乙醇燃料电池高性能阳极催化剂

王琪^a, 陆兴^a, 辛勤^b, 孙公权^b

a. 大连交通大学材料科学与工程学院中心实验室, 辽宁大连 116028;
b. 中国科学院大连化学物理研究所洁净能源国家实验室, 辽宁大连 116023

收稿日期:2013-01-11 修回日期:2014-02-21 出版日期:2014-08-01 发布日期:2014-08-05
通讯作者: 王琪, 孙公权
基金资助:
高等学校博士学科点专项科研基金联合资助课题（20122124120004）.

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

Qi Wang^a, Xing Lu^a, Qin Xin^b, Gongquan Sun^b

a. Liaoning Key Materials Laboratory for Railway, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning, China;
b. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China

Received:2013-01-11 Revised:2014-02-21 Online:2014-08-01 Published:2014-08-05
Supported by:
This work was financially supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (20122124120004).

摘要/Abstract

摘要：

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Pt_2.6Sn₁Ru_0.4/C催化剂具有较高的电池性能，其中，以60 wt% Pt_2.6Sn₁Ru_0.4/C催化剂为阳极的DEFC性能最高，90 ℃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，Pt_2.6Sn₁Ru_0.4/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Pt_2.6Sn₁Ru_0.4/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.

关键词: 直接乙醇燃料电池, 阳极催化剂, 多元醇法, 阳极产物, 乙醇氧化效率

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

王琪, 陆兴, 辛勤, 孙公权. 多元醇法合成的Pt_2.6Sn₁Ru_0.4/C用作直接乙醇燃料电池高性能阳极催化剂[J]. 催化学报, 2014, 35(8): 1394-1401.

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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多元醇法合成的Pt_2.6Sn₁Ru_0.4/C用作直接乙醇燃料电池高性能阳极催化剂

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

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