De-Alloyed PtCu/C Catalysts of Methanol Electrooxidation

被引：4
作者：
Men'shchikov, V. S. [1 ]
Guterman, V. E. [1 ]
Belenov, S. V. [1 ]
Spiridonova, O. A. [1 ]
Rezvan, D. V. [1 ]
机构：
[1] Southern Fed Univ, Fac Chem, Rostov Na Donu 344090, Russia
来源：
RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2020年 / 56卷 / 10期
关键词：
methanol electrooxidation; platinum-copper catalysts; bimetallic catalysts; de-alloyed catalysts; catalyst pretreatment; demetallized catalysts; activity in the methanol oxidation reaction; methanol fuel cells; OXYGEN REDUCTION REACTION; PT(CU)/C ELECTROCATALYSTS; CARBON-MONOXIDE; FUEL-CELLS; NANOPARTICLES; PTCO; STABILITY; NI;
D O I：
10.1134/S1023193520100080
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The activity of PtCu/C catalysts in methanol electrooxidation is studied in HClO4 solution. The electrochemical behavior of catalysts is compared for samples in the "as obtained" state and after their pretreatment in nitric acid which decreases the copper content in their composition. It is found that the partial selective dissolution of the alloying component renders no negative effect on the behavior of bimetallic catalysts. The prepared materials exhibit the high tolerance toward intermediates of methanol oxidation and their specific activity exceeds by a factor of 5-7 the activity of the commercial Pt/C catalysts. The results of this study open up the possibility of using de-alloyed platinum-copper catalysts in alcohol fuel cells, because this considerably decreases the risk of contamination of the polymeric membrane.
引用
收藏
页码：850 / 858
页数：9
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