Abstract

Platinum (Pt) catalysts dispersed on carbon-based support materials are generally used in the polymer electrolyte membrane (PEM) fuel cells. In this study, commercial graphene nanoplatelets (GNPs), with different surface areas (320, 530, 800 m² g⁻¹), were used as catalyst supports in PEM fuel cells. These GNPs were also pyrolyzed under the inert atmosphere, with and without melamine, as the nitrogen (N) source. Various characterizations (Elemental analysis, FTIR, Raman spectroscopy, BET, TEM, HRTEM, SAED, XRD, TGA, ICP-MS, contact angle measurement, CV, ORR, chronoamperometry, EIS, PEM fuel cell performance test) were performed for the detailed analysis of Pt/GNPs. Based on the three-electrode cell system, the lowest electrochemical surface area (ECSA) loss (29.9%), Pt mass activity loss (20.3%) and overall (charge and mass) resistance (42.2 Ω) were obtained with the Pt/M-530 catalyst. According to the in-situ PEM fuel cell performance results, the specific peak power density was recorded as (450 mW mg Pt⁻¹) for the Pt/R-530 catalyst, which has also the second most hydrophobic catalyst layer surface with the 146.5° ± 1.28° contact angle value. On the heels of Pt/R-530, the two best performances also belong to the Pt/M-530 (391 mW mg Pt⁻¹) and Pt/P-530 (378 mW mg Pt⁻¹) catalysts of the same group.

Graphic abstract

中文翻译：

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作为PEM燃料电池催化剂载体，具有不同表面积的未加工和热解（有或没有三聚氰胺的）石墨烯纳米片

摘要

分散在碳基载体材料上的铂（Pt）催化剂通常用于聚合物电解质膜（PEM）燃料电池中。在这项研究中，具有不同表面积（320、530、800 m ²  g ^-1）用作PEM燃料电池中的催化剂载体。这些GNP也会在惰性气氛下（有或没有三聚氰胺的情况下）作为氮（N）源进行热解。进行了各种表征（元素分析，FTIR，拉曼光谱，BET，TEM，HRTEM，SAED，XRD，TGA，ICP-MS，接触角测量，CV，ORR，计时电流法，EIS，PEM燃料电池性能测试）。 Pt / GNPs分析。基于三电极电池系统，在Pt / M的条件下，获得了最低的电化学表面积（ECSA）损失（29.9％），Pt质量活度损失（20.3％）和总（电荷和质量）电阻（42.2Ω）。 -530催化剂。根据原位PEM燃料电池性能结果，特定峰值功率密度记录为（450 mW mg Pt ^-1Pt / R-530催化剂），它也具有第二大疏水性催化剂层表面，接触角值为146.5°±1.28°。紧随Pt / R-530之后，两个最佳性能也属于同一组的Pt / M-530（391 mW mg Pt ^-1）和Pt / P-530（378 mW mg Pt ^-1） 。

图形摘要