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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >On the enhancement of methanol and CO electro-oxidation by amorphous (NiNb)PtSnRu alloys versus bifunctional PtRu and PtSn alloys
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On the enhancement of methanol and CO electro-oxidation by amorphous (NiNb)PtSnRu alloys versus bifunctional PtRu and PtSn alloys

机译：关于非晶态（NiNb）PtSnRu合金与双功能PtRu和PtSn合金增强的甲醇和CO电氧化

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It has been observed in this work and previous works [J. Barranco, A.R. Pierna, J. Non-Cryst. Solids 35 (2007) 851; J. Barranco, A.R. Pierna, J Power Sources 169 (2007) 71 [1,2]] that (NiNb)(99)(PtSn)(1) alloys surfaces are very effective catalyst for CO electro-oxidation, but not for methanol electro-oxidation. On the contrary, (NiNb)(99)(PtRu)(1) alloys seem to be a very effective catalyst for methanol, but not for CO, electro-oxidation. Since COads, is postulated to be a by-product in methanol electro-oxidation on Pt alloy surfaces, the lack of inactivity of (NiNb)(99)(PtSn)(1) amorphous alloys appears paradoxical. In this work we present the behaviour of a tricatalytic amorphous alloy, in methanol and COads, electro-oxidation in an attend to enhance the methanol and CO oxidation mechanisms of the Sn and Ru containing alloys, respectively. It has been observed that the specific activity for (NiNb)(99)(PtSnRu)(1) for methanol electro-oxidation, is enhanced around 50-80% with respect the bicatalytic PtSn alloys, at low methanol concentration, whereas PtRu catalysts seems to be more effective. At high methanol concentrations, (NiNb)(99)(PtSnRu)(1) catalysts seems to be more effective. The enhanced in the COads, is observed by the lower rate of poisoning of such alloy compare with the bicatalytic ones. The onset Of COads oxidation, appear to shift 0.25 V towards negative values of potentials, with respect (NiNb)(99)(PtRu)(1) electrodes.
机译：在这项工作和以前的工作中已经观察到了[J． Barranco，A.R.皮尔纳，J。非晶体。 Solids 35（2007）851; J.Barranco，A.R. Pierna，J Power Sources 169（2007）71 [1,2]]认为（NiNb）（99）（PtSn）（1）合金表面对于CO电氧化是非常有效的催化剂，但对于甲醇电氧化却不是。相反，（NiNb）（99）（PtRu）（1）合金似乎是一种非常有效的甲醇催化催化剂，而不是CO电氧化催化剂。由于假定Coads是甲醇在Pt合金表面上电氧化的副产物，因此缺乏（NiNb）（99）（PtSn）（1）非晶态合金的惰性似乎是矛盾的。在这项工作中，我们介绍了三催化非晶态合金在甲醇和COads中的行为，并在参与者中进行了电氧化，以分别增强含Sn和Ru的合金的甲醇和CO氧化机理。已经观察到，在低甲醇浓度下，（NiNb）（99）（PtSnRu）（1）对甲醇电氧化的比活性相对于双催化PtSn合金提高了约50-80％。更有效。在高甲醇浓度下，（NiNb）（99）（PtSnRu）（1）催化剂似乎更有效。与双催化合金相比，这种合金的中毒率较低，可以观察到COads的增强。相对于（NiNb）（99）（PtRu）（1）电极，COads氧化的开始似乎使0.25 V向电势的负值移动。

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