Abstract

Here, CeO₂ nanorods (CeO₂NRs) were successfully synthesized and characterized. Pt nanoparticles were synthesized in the presence of CeO₂NRs and the matrix of polyaniline (PA) and chitosan (CH) as support to prepare the novel Pt-CeO₂NRs/PA-CH nanocomposite. The electrocatalytic performance of Pt-CeO₂NRs/PA-CH was investigated for methanol oxidation (MO) through chronoamperometry, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. Durability of the prepared catalyst was also evaluated. The effects of several factors such as temperature, methanol concentration and scan rate were also studied for MO experimentally and statistically. Pt-CeO₂NRs/PA-CH had enhanced electrocatalytic activity, compared to Pt/PA-CH, revealing that it would be a promising catalyst for MO in fuel cells. The variations of anodic peak potential and current density of MO with three main factors (temperature, concentration and scan rate), their binary and triple interactions were investigated statistically. The results showed that both anodic peak potential and current density can be significantly affected by main factors and their interactions at 0.05 level of probability. Meanwhile, the proposed statistical models can accurately estimate the variation of peak potential and current density with studied factors. The results showed that increase in temperature and scan rate leads to the enhancement of both responses.

中文翻译：

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Pt纳米颗粒结合CeO 2纳米棒在聚苯胺-壳聚糖载体上对甲醇电氧化的增强电催化性能（实验和统计分析）

摘要

在这里，成功地合成并表征了CeO ₂纳米棒（CeO ₂ NRs）。在CeO ₂ NRs的存在下，以聚苯胺（PA）和壳聚糖（CH）的基质为载体合成了Pt纳米颗粒，制备了新型Pt-CeO ₂ NRs / PA-CH纳米复合材料。通过计时电流法，循环伏安法（CV）和电化学阻抗谱（EIS）技术研究了Pt-CeO ₂ NRs / PA-CH对甲醇氧化（MO）的电催化性能。还评估了制备的催化剂的耐久性。还通过实验和统计学方法研究了温度，甲醇浓度和扫描速率等几个因素对MO的影响。铂铈₂与Pt / PA-CH相比，NRs / PA-CH具有增强的电催化活性，这表明它将是燃料电池中MO的有前途的催化剂。对MO的阳极峰电位和电流密度随三个主要因素（温度，浓度和扫描速率），其二元和三元相互作用的变化进行了统计研究。结果表明，阳极峰值电势和电流密度均受主要因素及其相互作用的显着影响，概率为0.05。同时，提出的统计模型可以通过研究因素准确估计峰值电势和电流密度的变化。结果表明，温度和扫描速率的提高导致两种响应的增强。