NDLI: Preparation and influence of performance of anodic catalysts for direct methanol fuel cell

Content Provider	Springer Nature Link
Author	Wang, Zhenbo Yin, Geping Shi, Pengfei
Copyright Year	2007
Abstract	This research aims at increasing the utilization of platinum-ruthenium alloy (Pt-Ru) catalysts and thus lowering the catalyst loading in anodes for methanol electrooxidation. The direct methanol fuel cell’s (DMFC) anodic catalysts, Pt-Ru/C, were prepared by chemical reduction with a reducing agent added in two kinds of solutions under different circumstances. The reducing agent was added in hot solution with the protection of inert gases or just air, and in cold solution with inert gases. The catalysts were treated at different temperatures. Their performance was tested by cyclic voltammetry and potentiostatic polarization by utilizing their inherent powder microelectrode in 0.5 mol/L CH$_{3}$OH and 0.5 mol/LH$_{2}$SO$_{4}$ solution. The structures and micro-surface images of the catalysts were determined and observed by X-ray diffraction and transmission electron microscopy, respectively. The catalyst prepared in inert gases showed a better catalytic performance for methanol electrooxidation than that prepared in air. It resulted in a more homogeneous distribution of the Pt-Ru alloy in carbon. Its size is small, only about 4.5 nm. The catalytic performance is affected by the order of the reducing agent added. The performance of the catalyst prepared by adding the reductant at constant temperature of the solution is better than that prepared by adding it in the solution at 0°C and then heating it up to the reducing temperature. The structure of the catalyst was modified, and there was an increase in the conversion of ruthenium into the alloyed state and an increase in particle size with the ascension of heat treatment temperature. In addition, the stability of the catalyst was improved after heat treatment.
Starting Page	20
Ending Page	25
Page Count	6
File Format	PDF
ISSN	16737369
Journal	Frontiers of Chemical Engineering in China
Volume Number	1
Issue Number	1
e-ISSN	16737474
Language	English
Publisher	Higher Education Press
Publisher Date	2007-01-01
Publisher Institution	Chinese Universities
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	direct methanol fuel cell methanol electrooxidation Pt-Ru/C catalyst powder microelectrode Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Chemical Engineering

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