20.500.12556/RUL-140822 Graphene-derived carbon support boosts proton exchange membrane fuel cell catalyst stability The lack of efficient and durable proton exchange membrane fuel cell electrocatalysts for the oxygen reduction reaction is still restraining the present hydrogen technology. Graphene-based carbon materials have emerged as a potential solution to replace the existing carbon black (CB) supports; however, their potential was never fully exploited as a commercial solution because of their more demanding properties. Here, a unique and industrially scalable synthesis of platinum-based electrocatalysts on graphene derivative (GD) supports is presented. With an innovative approach, highly homogeneous as well as high metal loaded platinum-alloy (up to 60 wt %) intermetallic catalysts on GDs are achieved. Accelerated degradation tests show enhanced durability when compared to the CB-supported analogues including the commercial benchmark. Additionally, in combination with X-ray photoelectron spectroscopy Auger characterization and Raman spectroscopy, a clear connection between the sp$^2$ content and structural defects in carbon materials with the catalyst durability is observed. Advanced gas diffusion electrode results show that the GD-supported catalysts exhibit excellent mass activities and possess the properties necessary to reach high currents if utilized correctly. We show record-high peak power densities in comparison to the prior best literature on platinum-based GD-supported materials which is promising information for future application. PEMFC durability carbon support reduced graphene oxide mass transport kemijska tehnologija kataliza ogljik grafenov oksid true false true Angleški jezik Slovenski jezik Članek v reviji 2022-09-19 08:49:09 2022-09-19 08:49:10 2022-09-24 04:12:17 0000-00-00 00:00:00 2022 0 0 Str. 9540–9548 iss. 15 Vol. 12 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66 2155-5435 10.1021/acscatal.2c01753 116596995 acscatal.2c01753_Graphene-Derived_Carbon_Support_Boosts_Proton_Exchange_Membrane_Fuel_Cell_Catalyst_Stability.pdf acscatal.2c01753_Graphene-Derived_Carbon_Support_Boosts_Proton_Exchange_Membrane_Fuel_Cell_Catalyst_Stability.pdf 1 6BE23C8448B645208E380E54C102B85B 510a277e3c69924a457f6405a0dabf48a5d0e614c1baee486c6a21a92b550523 b4ad8ad6-3b28-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=162064 https://pubs.acs.org/doi/10.1021/acscatal.2c01753 1 1721846c-37e7-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=161620 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0