Novel composite catalysts of nanostructured PtCo and PtNi alloys onto a coated glassy carbon electrode (GCE) with a nanostructured alloy of NiCo as a substrate material were fabricated by an electrodeposition method from their salt solutions at ambient temperature. The PtCo/NiCo/GCE and the PtNi/NiCo/GCE catalysts display an improved electrocatalytic behavior for the electrochemical oxidation reaction of methanol (MOR). The morphology, chemical composition, and phase structure for the electrodeposited catalysts were checked utilizing a scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDAX), and X-ray diffraction (XRD) technique, respectively. PtCo/NiCo/GCE catalyst shows coral particles of reef-shaped morphology, whilst the PtNi/NiCo/GCE catalyst star-shaped particles. The electrocatalytic performance of the electrodeposited catalysts was verified using chronoamperometry and cyclic voltammetry (CV). The effects of the type of electrodeposition method, pH of the solution, temperature, and precursors concentration on the characteristics of the PtCo and PtNi alloys electrodeposits and accordingly on the electrocatalytic peculiarities of the catalysts were well assessed. Furthermore, the impact of methanol concentration and temperature on MOR was discussed. The stability and the corrosion resistance tests of the PtNi/Ni-Co/GCE and PtCo/Ni-Co/GCE systems were evaluated via the electrochemical impedance spectroscopy (EIS), Tafel polarization, and potentiostatic methods.

纳米结构的 PtCo 和 PtNi 合金在涂层玻璃碳电极 (GCE) 上的新型复合催化剂，以 NiCo 的纳米结构合金为基材，通过电沉积方法在环境温度下从它们的盐溶液中制备。PtCo/NiCo/GCE 和 PtNi/NiCo/GCE 催化剂对甲醇的电化学氧化反应 (MOR) 显示出改进的电催化行为。分别使用扫描电子显微镜 (SEM)、能量色散 X 射线光谱 (EDAX) 和 X 射线衍射 (XRD) 技术检查电沉积催化剂的形貌、化学组成和相结构。PtCo/NiCo/GCE 催化剂呈珊瑚礁状颗粒，而 PtNi/NiCo/GCE 催化剂呈星形颗粒。使用计时电流法和循环伏安法 (CV) 验证了电沉积催化剂的电催化性能。电沉积方法的类型、溶液的 pH 值、温度和前体浓度对 PtCo 和 PtNi 合金电沉积物的特性的影响，以及相应地对催化剂电催化特性的影响都得到了很好的评估。此外，还讨论了甲醇浓度和温度对 MOR 的影响。PtNi/Ni-Co/GCE 和 PtCo/Ni-Co/GCE 系统的稳定性和耐腐蚀性测试通过电化学阻抗谱 (EIS)、Tafel 极化和恒电位方法进行评估。温度和前体浓度对 PtCo 和 PtNi 合金电沉积物的特性以及相应催化剂的电催化特性进行了很好的评估。此外，还讨论了甲醇浓度和温度对 MOR 的影响。PtNi/Ni-Co/GCE 和 PtCo/Ni-Co/GCE 系统的稳定性和耐腐蚀性测试通过电化学阻抗谱 (EIS)、Tafel 极化和恒电位方法进行评估。温度和前体浓度对 PtCo 和 PtNi 合金电沉积物的特性以及相应催化剂的电催化特性进行了很好的评估。此外，还讨论了甲醇浓度和温度对 MOR 的影响。PtNi/Ni-Co/GCE 和 PtCo/Ni-Co/GCE 系统的稳定性和耐腐蚀性测试通过电化学阻抗谱 (EIS)、Tafel 极化和恒电位方法进行评估。