: In this study, carbon-supported Pt-based catalysts, including PtRu, PtRh, and PtRuRh nanorods (NRs), were prepared by the formic acid reduction method for ethanol oxidation reaction (EOR) application. The aspect ratio of all experimental NRs is 4.6. The X-ray photoelectron spectroscopy and H₂-temperature-programmed reduction results confirm that the ternary PtRuRh has oxygen-containing species (OCS), including PtO_x, RuO_x and RhO_x, on its surface and shows high EOR current density at 0.6 V. The corresponding physical structure results indicate that the surface OCS can enhance the adsorption of ethanol through bi-functional mechanism and thereby promote the EOR activity. On the other hand, the chronoamperometry (CA) results imply that the ternary PtRuRh has the highest mass activity, specific activity, and stability among all catalysts. The aforementioned pieces of evidence reveal that the presence of OCS facilitates the oxidation of adsorbed intermediates, such as CO or CH_x, which prevents the Pt active sites from poisoning and thus simultaneously improves the current density and durability of PtRuRh NRs in EOR.

中文翻译：

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碳载PtRuRh纳米棒的乙醇氧化反应性能

： 在本研究中，通过甲酸还原法制备乙醇负载的碳负载的基于Pt的催化剂，包括PtRu，PtRh和PtRuRh纳米棒（NRs）。所有实验性NR的长宽比均为4.6。X射线光电子能谱和H ₂程序编程的还原结果证实三元PtRuRh具有含氧物种（OCS），包括PtO _x，RuO _x和RhO _x在表面上显示出较高的EOR电流密度（在0.6 V时）。相应的物理结构结果表明，表面OCS可以通过双功能机理增强乙醇的吸附，从而提高EOR活性。另一方面，计时电流法（CA）结果表明三元PtRuRh在所有催化剂中具有最高的质量活度，比活度和稳定性。上述证据表明，OCS的存在促进了被吸附的中间体（如CO或CH _x）的氧化，从而防止了Pt活性位中毒，从而同时提高了EOR中PtRuRh NR的电流密度和耐用性。