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首页> 外文期刊>Journal of solid state electrochemistry >Preparation and electrochemical behaviors of platinum nanoparticles impregnated on binary carbon supports as catalyst electrodes of direct methanol fuel cells
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Preparation and electrochemical behaviors of platinum nanoparticles impregnated on binary carbon supports as catalyst electrodes of direct methanol fuel cells

机译：直接甲醇燃料电池催化剂电极上二元碳载体上浸渍的铂纳米粒子的制备及电化学行为

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摘要

Binary carbon-supported platinum (Pt) nanoparticles were prepared by a chemical reduction method of Pt precursor on two types of carbon materials such as carbon blacks (CBs) and graphite nanofibers (GNFs). Average sizes and loading levels of Pt metal particles were dependent on a mixing ratio of two carbon materials. The highest electroactivity for methanol oxidation was obtained by preparing the binary carbon supports consisting of GNFs and CBs with a weight ratio of 30:70. Furthermore, with an increase of GNFs content from 0% to 30%, a charge-transfer resistance changed from 19 Ohm cm(2) to 11 Ohm cm(2). The change of electroactivity or the resistance of catalyst electrodes was attributed to the changes of specific surface area and morphological changes of carbon-supported catalyst electrodes by controlling the mixing ratio of GNFs and CBs.
机译：通过Pt前体的化学还原方法，在两种类型的碳材料（例如炭黑（CB）和石墨纳米纤维（GNF））上制备了二元碳载铂（Pt）纳米颗粒。 Pt金属颗粒的平均尺寸和负载水平取决于两种碳材料的混合比。通过制备重量比为30:70的由GNF和CB组成的二元碳载体，可以获得最高的甲醇氧化电活性。此外，随着GNFs含量从0％增加到30％，电荷转移电阻从19 Ohm cm（2）变为11 Ohm cm（2）。通过控制GNF和CB的混合比，电活性或催化剂电极电阻的变化归因于比表面积的变化和碳载催化剂电极的形态变化。

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