Journal
CATALYSIS TODAY
Volume 352, Issue -, Pages 10-17Publisher
ELSEVIER
DOI: 10.1016/j.cattod.2019.11.016
Keywords
Pt supported catalyst; Carbon black; Reduced graphene oxide; Oxygen reduction reaction; Proton exchange membrane fuel cells
Funding
- National Research Foundation of Korea [NRF-2017M3A7B4049466, NRF-2018R1C1B5045721]
- Ministry of Trade, Industry and Energy of Knowledge Economy (MOTIE) [10067386]
- Ministry of Economy and Finance (MOEF) [EO190011]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10067386] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Council of Science & Technology (NST), Republic of Korea [EO190011] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Proton exchange membrane fuel cells (PEMFCs) are mainly used as a power source of hydrogen fuel cell vehicles. Also, their catalytic activity and durability of oxygen reduction reaction are important because they operate at high voltage and strongly acidic conditions. In this research, we studied the characteristics of the Pt nanoparticles (NPs) supported on the graphene oxide (GO), partially reduced graphene oxide (GO-r), and reduced graphene oxide (rGO) to investigate the enhancement of the activity and durability of oxygen reduction catalysts for PEMFCs. Pt catalysts supported on carbonaceous materials were synthesized through a facile polyol method, and the characteristics of the synthesized catalysts were analyzed with transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, X-ray photoelectron spectroscopy, linear sweep voltammetry, cyclic voltammetry, electrochemical impedance spectroscopy, and Raman spectroscopy. The outcomes demonstrated that the rGO was superior to the carbon black support in oxygen reduction activity and long-term durability. Here, the reduced concentration of oxygen related functional groups on the graphene support was the key factor to enhance the oxygen reduction properties and long-term durability of the Pt/rGO catalyst.
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