Abstract The high-quality of reduced graphene oxide (rGO) supported platinum nanoparticles (PtNPs) was synthesized by a simple, efficient, rapid, clean, surfactant-free, and single-step of hydrothermal-assisted formic acid process. The as-synthesized rGO/PtNPs catalyst was extensively characterized in which demonstrated that the PtNPs have successfully anchored on the surface of rGO with the small average particle size of 4 nm. The evaluation of electrocatalytic activity and durability performance of the as-synthesized rGO/PtNPs nanocomposite catalyst towards methanol oxidation reaction (MOR) as well as the determination of electrochemical surface area (ECSA) were carried out by cyclic voltammogram and chronoamperometry. Besides, the as-prepared rGO/PtNPs nanocomposite catalyst has further proved the remarkably higher electrocatalytic property which exhibited superior maximum forward peak current density (64.04 mA/cm2) toward MOR in acidic media compared with Vulcan XC72/PtNPs (47.54 mA/cm2) and rGO/PdNPs (6.21 mA/cm2) catalysts owing to homogenous distribution and synergic effects of PtNPs with rGO as well as improved electron transfer by rGO. Moreover, the rGO/PtNPs nanocomposite catalyst still achieve the high current density even after 2900 s of continuous catalyst at 0.6 V. This study provides new insights into the production of superior electrocatalytic activity and durability of anode catalyst through a facile, low cost and clean synthesis approach for the enhancement of direct methanol fuel cell performance.

中文翻译：

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一种先进、高效且高度耐用的 rGO/PtNPs 纳米复合电催化剂，通过水热辅助甲酸法一步法制备，用于甲醇的电催化氧化反应

摘要 通过简单、高效、快速、清洁、不含表面活性剂的单步水热辅助甲酸工艺合成了高质量的还原氧化石墨烯 (rGO) 负载的铂纳米粒子 (PtNPs)。对合成的 rGO/PtNPs 催化剂进行了广泛的表征，证明 PtNPs 已成功锚定在 rGO 表面，平均粒径为 4 nm。通过循环伏安图和计时电流法评估所合成的 rGO/PtNPs 纳米复合催化剂对甲醇氧化反应 (MOR) 的电催化活性和耐久性性能以及电化学表面积 (ECSA) 的测定。除了，所制备的 rGO/PtNPs 纳米复合催化剂进一步证明了显着更高的电催化性能，与 Vulcan XC72/PtNPs (47.54 mA/cm2) 和 rGO 相比，在酸性介质中对 MOR 表现出优异的最大正向峰值电流密度 (64.04 mA/cm2) /PdNPs (6.21 mA/cm2) 催化剂由于 PtNPs 与 rGO 的均匀分布和协同作用以及 rGO 改进的电子转移。此外，即使在 0.6 V 连续催化剂 2900 秒后，rGO/PtNPs 纳米复合催化剂仍能实现高电流密度。该研究为通过简便、低成本和清洁的方法生产出优异的电催化活性和阳极催化剂的耐久性提供了新的见解。用于提高直接甲醇燃料电池性能的合成方法。