The catalytic activity and electrochemical stability of Pd‐CeO_2‐NR/C (CeO_2‐NR: cerium oxide nanorods) for the Oxygen Reduction Reaction (ORR) and the Ethanol Oxidation Reaction (EOR) is shown in alkaline media and compared to Pd/C. Evaluation of catalytic activity for the ORR in a Rotating Ring Disc Electrode (RRDE) set‐up, shows that Pd‐CeO_2‐NR/C promotes the reaction with a percentage of hydrogen peroxide production (%H₂O₂) around 2–4 %, and an electron transfer number (n) close to 4. Tafel plots demonstrates higher mass and specific activities of Pd‐CeO_2‐NR/C than Pd/C. Moreover, from cyclic voltammetry tests, Pd‐CeO_2‐NR/C shows a higher mass catalytic activity (j_m= 697 mA mg⁻¹_Pd) for the EOR at a more negative onset potential (E_onset= 0.29 V/RHE) than Pd/C. After Accelerated Degradation Tests (ADT), Pd‐CeO_2‐NR/C retains ∼98 % of its Electrochemically Active Surface Area (ECSA), higher than ∼51 % of Pd/C. After ADT, the performance of Pd‐CeO_2‐NR/C remains similar for the ORR, while it is significantly higher for the EOR, compared to Pd/C. Thus, the addition of CeO_2‐NR enhances the electrocatalytic behavior and stability of Pd towards the ORR and the EOR.

中文翻译：

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具有高电化学稳定性和碱性介质中ORR和EOR催化活性的双功能Pd-CeO2纳米棒/ C纳米催化剂

在碱性介质中显示了Pd-CeO _2-NR / C（CeO _2-NR：氧化铈纳米棒）对氧还原反应（ORR）和乙醇氧化反应（EOR）的催化活性和电化学稳定性，并与Pd进行了比较/C。旋转圆盘电极（RRDE）装置中ORR的催化活性评估表明，Pd-CeO _2-NR / C可以促进反应，其中过氧化氢产生的百分比（％H ₂ O ₂）约为2– 4％，电子转移数（n）接近4。塔菲尔图显示，Pd-CeO _2-NR / C的质量和比活度比Pd / C高。此外，根据循环伏安法测试，Pd-CeO _2-NR/ C在比Pd / C更负的起始电位（E_起始= 0.29 V / RHE）下显示出更高的EOR质量催化活性（j _m = 697 mA mg ^-1 _Pd）。经过加速降解测试（ADT），Pd-CeO _2-NR / C保留了约98％的电化学活性表面积（ECSA），高于Pd / C的约51％。在ADT之后，ORR的Pd-CeO _2-NR / C性能与Pd / C相比仍然相似，而EOR的性能却明显更高。因此，添加CeO _{2 -NR}可以增强Pd对ORR和EOR的电催化性能和稳定性。