Graphene-derived carbon support boosts proton exchange membrane fuel cell catalyst stability

Pavko, Luka (avtor), Gatalo, Matija (avtor), Finšgar, Matjaž (avtor), Ruiz-Zepeda, Francisco (avtor), Ehelebe, Konrad (avtor), Kaiser, Pascal (avtor), Geuß, Moritz (avtor), Đukić, Tina (avtor), Surca, Angelja Kjara (avtor), Šala, Martin (avtor), Bele, Marjan (avtor), Cherevko, Serhiy (avtor), Genorio, Boštjan (avtor), Hodnik, Nejc (avtor), Gaberšček, Miran (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: PEMFC, durability, carbon support, reduced graphene oxide, mass transport
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: Str. 9540–9548
• Številčenje: Vol. 12, iss. 15
• PID: 20.500.12556/RUL-140822
• UDK: 66
• ISSN pri članku: 2155-5435
• DOI: 10.1021/acscatal.2c01753
• COBISS.SI-ID: 116596995
• Datum objave v RUL: 19.09.2022

Gradivo je del revije

• Naslov: ACS catalysis
• Skrajšan naslov: ACS catal.
• Založnik: American Chemical Society
• ISSN: 2155-5435
• COBISS.SI-ID: 518529817

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kemijska tehnologija, kataliza, ogljik, grafenov oksid