In this research, the electrocatalytic activity of platinum-ruthenium nanoparticles on carbon nanotubes and carbon black in methanol oxidation reaction has been investigated. Moreover, the electrochemical performance of a single passive direct methanol fuel cell run by these two different electrocatalysts has been reported. Physical characterization and electrochemical tests reveal the superiority of PtRu on carbon nanotubes. Based on the voltammetry outcomes, it was found that methanol oxidation reaction kinetics has been improved on the nanotube-supported catalyst. The current density of oxidation reaction has increased up to 62% in nanotube sample compared to carbon black-supported one. The electrochemical test results have shown that the carbon nanotubes increase the performance of the microfuel cell by 37% at maximum power density, compared to the carbon black. Moreover, the resistance of the samples supported by carbon nanotubes to poisonous intermediate species has been found 3% more than carbon black-supported one. According to the chronoamperometry test results, it was concluded that the performance and sustainability of the carbon nanotube electrocatalyst show a remarkable improvement compared to carbon black electrocatalyst in the long term.

中文翻译：

---

使用碳纳米管改善甲醇微燃料电池催化剂的电化学性能

本研究考察了铂-钌纳米颗粒对碳纳米管和炭黑在甲醇氧化反应中的电催化活性。此外，已经报道了由这两种不同电催化剂运行的单个被动直接甲醇燃料电池的电化学性能。物理表征和电化学测试揭示了 PtRu 对碳纳米管的优越性。基于伏安法结果，发现在纳米管负载的催化剂上甲醇氧化反应动力学得到了改进。与炭黑负载的纳米管样品相比，纳米管样品的氧化反应电流密度增加了 62%。电化学测试结果表明，碳纳米管在最大功率密度下将微燃料电池的性能提高了37％，与炭黑相比。此外，已发现由碳纳米管支撑的样品对有毒中间体的抵抗力比炭黑支撑的样品高 3%。根据计时电流法测试结果，得出的结论是，与碳黑电催化剂相比，长期而言，碳纳米管电催化剂的性能和可持续性显示出显着的提高。