PtRu nanoparticles supported on ozone-treated mesoporous carbon thin film as highly active anode materials for direct methanol fuel cells

Meng Liang Lin, Man Yin Lo, Chung Yuan Mou

研究成果: 雜誌貢獻文章同行評審

43 引文 斯高帕斯(Scopus)

摘要

Ordered mesoporous thin-film carbon (TFC) material, of short channels vertical to the film, was synthesized by hard templating and deposited with PtRu nanocatalyst as an anodic material in a direct methanol fuel cell (DMFC). A series of PtRu bimetallic nanoparticles supported on ozone-pretreated carbon were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and extended X-ray absorption fine structure (EXAFS) analysis. For 20 wt % PtRu catalyst supported on a 30 min ozone-pretreated TFC gave an unprecedented current density of 410 mA/mg PtRu at 0.5 V relative to reference hydrogen electrode (RHE) at 60 °C. The ozone treatment method introduces an easily controllable way for surface modification of mesoporous carbon which was found to modulate the surface composition and structure of the deposited PtRu nanoparticles. The greatly enhanced methanol electrochemical oxidation activity, at an optimum ozone treatment, was ascribed to facile transport in the TFC structure, high dispersion of bimetallic nanoparticles, and an optimized surface Pt and Ru ensembles of 70:30 ratios for a bifunctional efficiency.

原文英語
頁(從 - 到)16158-16168
頁數11
期刊Journal of Physical Chemistry C
113
發行號36
DOIs
出版狀態已發佈 - 9月 10 2009
對外發佈

ASJC Scopus subject areas

  • 電子、光磁材料
  • 能源(全部)
  • 物理與理論化學
  • 表面、塗料和薄膜

指紋

深入研究「PtRu nanoparticles supported on ozone-treated mesoporous carbon thin film as highly active anode materials for direct methanol fuel cells」主題。共同形成了獨特的指紋。

引用此