用于直接甲醇燃料电池的通过电沉积制备的具有不同铂比例与钌比例的铂钌/钛阳极。

PtRu/Ti anodes with varying Pt ratio: Ru ratio prepared by electrodeposition for the direct methanol fuel cell.

作者信息

Shao Zhi-Gang, Zhu Fuyun, Lin Wen-Feng, Christensen Paul A, Zhang Huamin

机构信息

School of Chemical Engineering and Advanced Materials, Bedson Building, University of Newcastle upon Tyne, Newcastle upon Tyne, UKNE1 7RU.

出版信息

Phys Chem Chem Phys. 2006 Jun 21;8(23):2720-6. doi: 10.1039/b604939g. Epub 2006 May 23.

DOI:10.1039/b604939g

PMID:16763704

Abstract

PtRu/Ti anodes with varying Pt ratio Ru ratio were prepared by electrodeposition of a thin PtRu catalyst layer onto Ti mesh for a direct methanol fuel cell (DMFC). The morphology and structure of the catalyst layers were analyzed by SEM, EDX and XRD. The catalyst coating layer shows an alloy character. The relative activities of the PtRu/Ti electrodes were assessed and compared in half cell and single DMFC experiments. The results show that these electrodes are very active for the methanol oxidation and that the optimum Ru surface coverage was ca. 9 at.% for DMFC operating at 20 degrees C and 11 at.% at 60 degrees C. The PtRu/Ti anode shows a performance comparable to that of the conventional carbon-based anode in a DMFC operating with 0.25 M or 0.5 M methanol solution and atmosphere oxygen gas at 90 degrees C.

摘要

通过将薄的PtRu催化剂层电沉积到用于直接甲醇燃料电池（DMFC）的钛网上，制备了具有不同Pt比例和Ru比例的PtRu/Ti阳极。通过扫描电子显微镜（SEM）、能量散射X射线谱（EDX）和X射线衍射（XRD）分析了催化剂层的形态和结构。催化剂涂层呈现出合金特性。在半电池和单DMFC实验中评估并比较了PtRu/Ti电极的相对活性。结果表明，这些电极对甲醇氧化非常活跃，并且在20℃下运行的DMFC的最佳Ru表面覆盖率约为9原子％，在60℃下为11原子％。在90℃下使用0.25M或0.5M甲醇溶液和大气氧气运行的DMFC中，PtRu/Ti阳极表现出与传统碳基阳极相当的性能。