Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 22, Issue 22, Pages -Publisher
MDPI
DOI: 10.3390/ijms222212300
Keywords
oxygen reduction reaction; proton exchange membrane fuel cell; graphene; Pt catalyst
Funding
- Korea Institute of Industrial Technology (KITECH) [EI210023]
- Ministry of SMEs and Startups (MSS, Korea) [S2912921]
- Ministry of Health & Welfare (MOHW), Republic of Korea [S2912921] 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 [EI210023] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The study demonstrated highly efficient oxygen reduction catalysts composed of uniform Pt nanoparticles on small, reduced graphene oxides (srGO). The catalysts exhibited efficient surface reactions, large surface areas, high metal dispersions, and excellent oxygen reduction performance. Detailed investigations suggested that the chemical functionality and electrical conductivity greatly influenced the enhanced oxygen reduction efficiency of the catalysts.
We demonstrated highly efficient oxygen reduction catalysts composed of uniform Pt nanoparticles on small, reduced graphene oxides (srGO). The reduced graphene oxide (rGO) size was controlled by applying ultrasonication, and the resultant srGO enabled the morphological control of the Pt nanoparticles. The prepared catalysts provided efficient surface reactions and exhibited large surface areas and high metal dispersions. The resulting Pt/srGO samples exhibited excellent oxygen reduction performance and high stability over 1000 cycles of accelerated durability tests, especially the sample treated with 2 h of sonication. Detailed investigations of the structural and electrochemical properties of the resulting catalysts suggested that both the chemical functionality and electrical conductivity of these samples greatly influence their enhanced oxygen reduction efficiency.
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