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

Abstract

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.

Keywords

kemijska tehnologija;kataliza;ogljik;grafenov oksid;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: KI - National Institute of Chemistry
UDC: 66
COBISS: 116596995 Link will open in a new window
ISSN: 2155-5435
Views: 34
Downloads: 17
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Other data

Secondary language: Slovenian
Secondary keywords: kemijska tehnologija;kataliza;ogljik;grafenov oksid;
Type (COBISS): Article
Pages: str. 9540–9548
Volume: ǂVol. ǂ12
Issue: ǂiss. ǂ
Chronology: 2022
DOI: 10.1021/acscatal.2c01753
ID: 16506301
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