Intensive studies have been devoted to the preparation of electrocatalysts with outstanding activity and stability for ethanol oxidation. However, the electrocatalytic efficiency is far from satisfactory for application due to the low catalytic activity and C1 product selectivity. Herein, helical PdPtAu nanowires (NWs) surrounded by high-index facets are fabricated for ethanol electrooxidation with enhanced C1 selectivity. Among the PdPtAu NWs with different Au contents, Pd₁₄Pt₅Au₂ NWs show the highest specific activity, which is 1.4, 5.5, and 7.3 times that of Pd₁₄Pt₅ NWs, commercial Pt black, and Pd black, respectively. The Pd₁₄Pt₅Au₂ NWs have high anti-poisoning ability as confirmed by CO stripping and in situ FTIR spectra of CO adsorption. In situ FTIR investigations during the ethanol oxidation reveal that Pd₁₄Pt₅Au₂ NWs enhance the cleavage of the C–C bond, leading to a 3.3-fold increase in C1 selectivity (23.2%) compared with that of commercial Pd black (7.0%).

中文翻译：

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与高指数面结合的螺旋 PdPtAu 纳米线选择性地切换乙醇电氧化的途径

大量研究致力于制备具有出色的乙醇氧化活性和稳定性的电催化剂。然而，由于低催化活性和C1产物选择性，其电催化效率远不能令人满意。在此，制备了由高指数面包围的螺旋 PdPtAu 纳米线 (NW)，用于乙醇电氧化，具有增强的 C1 选择性。在不同Au含量的PdPtAu NWs中，Pd ₁₄ Pt ₅ Au ₂ NWs的比活度最高，分别是Pd ₁₄ Pt ₅ NWs、商业Pt黑和Pd黑的1.4、5.5和7.3倍。Pd ₁₄ Pt ₅ Au ₂纳米线具有较高的抗中毒能力，这通过 CO 汽提和CO 吸附的原位FTIR 光谱证实。_{乙醇氧化过程中}的原位FTIR研究表明，与商业_Pd黑_（ 7.0 %）。