Abstract The importance of carbonaceous catalyst support materials in polymer electrolyte membrane (PEM) fuel cell is well known. In this study, we used two different types of commercial graphene nanoplatelets (GNPs) that have respectively 181 m2/g (G1) and 745 m2/g (G2) surface areas and their pyrolyzed forms with and without melamine as platinum (Pt) catalyst support. The GNPs pyrolyzed with melamine were called as M-G1, M-G2; while pyrolyzed without melamine were called as P-G1, P-G2 through the study. Solely, M-G2 sample was nitrogen (N) doped (2.3 %) via pyrolysis by means of melamine. Pt nanoparticles (NPs) were loaded on these support materials by using microwave irradiation technique. PEM fuel cell performance tests were conducted in order to determine the electrochemical activity of the Pt/GNPs catalysts along with polydimethylsiloxane (PDMS) polymer as catalyst binder. Pt/G2 and Pt/M-G2 provided the better PEM fuel cell performance results according to the Pt/G1 and Pt/M-G1 with PDMS binder. Both of Pt/M-G1/PDMS and Pt/M-G2/PDMS gave the lower performance values compared to their pristine cases. Beside, conventional Nafion solution were also used as catalyst binder in the content of catalyst inks of the best two catalysts (Pt/G2, Pt/M-G2). PDMS and Nafion were compared with each other in terms of PEM fuel cell performance. Based on PEM fuel cell performance results (@0.6 V), Pt/G2/PDMS (531.8 mA/cm2) prevailed the Pt/G2/Nafion (473.7 mA/cm2). However, performance sequence changed inversely for the Pt/M-G2/PDMS (62.6 mA/cm2) and Pt/M-G2/Nafion (329.9 mA/cm2) catalysts. It is believed that the high oxygen permeability and hydrophobicity of the PDMS polymer will improve PEM fuel cell performance. It was thought that the high oxygen permeability and hydrophobicity of the PDMS polymer would improve fuel cell performance, and confirming this consideration, the highest current density value among catalysts was achieved when the Pt/G2 catalyst was used along with the catalyst binder of PDMS polymer.

中文翻译：

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铂/石墨烯纳米片/硅橡胶复合材料作为聚合物电解质膜燃料电池催化剂

摘要 碳质催化剂载体材料在聚合物电解质膜 (PEM) 燃料电池中的重要性是众所周知的。在这项研究中，我们使用了两种不同类型的商业石墨烯纳米片 (GNP)，它们的表面积分别为 181 m2/g (G1) 和 745 m2/g (G2)，它们的热解形式有和没有三聚氰胺作为铂 (Pt) 催化剂支持。用三聚氰胺热解的GNP称为M-G1、M-G2；通过研究，不含三聚氰胺的热解被称为P-G1、P-G2。M-G2 样品仅通过三聚氰胺热解进行氮 (N) 掺杂 (2.3%)。通过使用微波辐射技术将 Pt 纳米粒子 (NPs) 负载在这些支撑材料上。进行 PEM 燃料电池性能测试以确定 Pt/GNPs 催化剂以及作为催化剂粘合剂的聚二甲基硅氧烷 (PDMS) 聚合物的电化学活性。根据具有PDMS粘合剂的Pt/G1和Pt/M-G1，Pt/G2和Pt/M-G2提供了更好的PEM燃料电池性能结果。与原始情况相比，Pt/M-G1/PDMS 和 Pt/M-G2/PDMS 的性能值都较低。此外，在最佳两种催化剂（Pt/G2、Pt/M-G2）的催化剂油墨含量中，还使用常规Nafion溶液作为催化剂粘合剂。PDMS 和 Nafion 在 PEM 燃料电池性能方面进行了相互比较。根据 PEM 燃料电池性能结果 (@0.6 V)，Pt/G2/PDMS (531.8 mA/cm2) 优于 Pt/G2/Nafion (473.7 mA/cm2)。然而，Pt/M-G2/PDMS 的性能顺序发生了相反的变化（62. 6 mA/cm2) 和 Pt/M-G2/Nafion (329.9 mA/cm2) 催化剂。据信，PDMS 聚合物的高透氧性和疏水性将提高 PEM 燃料电池的性能。人们认为 PDMS 聚合物的高透氧性和疏水性将提高燃料电池的性能，并证实了这一考虑，当 Pt/G2 催化剂与 PDMS 聚合物的催化剂粘合剂一起使用时，可实现催化剂中最高的电流密度值.