Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 23, Pages 26936-26947Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c04132
Keywords
graphene nanoribbon; fluorine doping; oxygen reduction; carbon corrosion; MEA; DFT calculation; PEMFC
Funding
- National Research Foundation of Korea [2017R1D1A1B04031539, NRF-2018K1A3A1A09079061]
- Development Program of KIER in the Republic of Korea [C1-2415]
- Cooperative Research Program for Agriculture Science and Technology Development by Rural Development Administration [PJ016253]
- Global Frontier Hybrid Interface Materials (GFHIM) of the NRF - Ministry of Science and ICT [2013M3A6B1078882]
- National Research Foundation of South Africa [SKOR202011579224]
- National Research Foundation of Korea [2017R1D1A1B04031539, 2018K1A3A1A09079061] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Fluorine-doped graphene nanoribbons were found to have a stable structure and exhibit good performance in carbon corrosion, making them suitable as support materials for electrocatalysts and cathode additives in polymer electrolyte membrane fuel cells.
Pt-supported carbon material-based electrocatalysts are formidably suffering from carbon corrosion when H2O and O-2 molecules are present at high voltages in polymer electrolyte membrane fuel cells (PEMFCs). In this study, we discovered that the edge site of a fluorine-doped graphene nanoribbon (F-GNR) was slightly adsorbed with H2O and was thermodynamically unfavorable with O atoms after defining the thermodynamically stable structure of the F-GNR from DFT calculations. Based on computational predictions, the physicochemical and electrochemical properties of F-GNRs with/without Pt nanoparticles derived from a modified Hummer's method and the polyol process were investigated as support materials for electrocatalysts and additives in the cathode of a PEMFC, respectively. The Pt/F-GNR showed the lowest degradation rate in carbon corrosion and was effective in the cathode as additives, resulting from the enhanced carbon corrosion durability owing to the improved structural stability and water management. Notably, the F-GNR with highly stable carbon corrosion contributed to achieving a more durable PEMFC for long-term operation.
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