Nafion

Bonding Nafion® with polydimethysiloxane: A versatile approach towards ion-exchange membrane microfluidic devices

ty10086 提交于 周四, 08/26/2021 - 13:20
Abstract(#br)Polydimethylsiloxane (PDMS) is one of the most widely used materials for the fabrication of microfluidic devices. The uncomplicated integration of ion-exchange membranes, such as Nafion ® , would facilitate manifold electrochemical processes in microfluidics. However, the Nafion ionomer does not directly bond with cross-linked PDMS and the assembly of the membrane and PDMS substrate still remains a technological challenge.

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

ty10086 提交于 周三, 08/25/2021 - 16:26
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众所周知。本研究采用了两种不同类型的商业石墨烯纳米片( GNPs ),分别具有181   m2 / g ( G1 )和745   m2 / g ( G2 )表面积及其在有无三聚氰胺的情况下的热解形式作为铂( Pt )催化剂载体。通过研究,将三聚氰胺热解的GNPs称为M - G1、M - G2,而未热解的GNPs称为P - G1、P - G2。显然,M-G2样品是通过三聚氰胺热解掺氮( N )的( 2.3 % )。利用微波辐照技术将Pt纳米颗粒( NPs )负载在这些支撑材料上。为了确定Pt / GNPs催化剂与聚二甲基硅氧烷( PDMS )聚合物作为催化剂结合剂的电化学活性,进行了PEM燃料电池性能测试。根据Pt / G1和Pt / M-G1与PDMS聚合物的匹配,Pt / G2和Pt / M-G2提供了更好的PEM燃料电池性能。Pt / M-G1 / PDMS和Pt / M-G2 / PDMS复合材料均给出了原始情况给出了更低的性能值。此外,在最佳两种催化剂( Pt / G2,Pt / M-G2 )的油墨含量中,还采用传统Nafion溶液作为催化剂粘结剂。PDMS和Nafion在PEM燃料电池性能方面进行了比较。