@article{029aa11d1766428280ece1c0b85056e1,
title = "Growth and Deposition of Au Nanoclusters on Polymer-wrapped Graphene and Their Oxygen Reduction Activity",
abstract = "The development of a non-Pt electrocatalyst with a high performance for the oxygen reduction reaction (ORR) is one of the central issues in polymer electrolyte fuel cells science. Au-nanoparticles (Au-NPs) with a diameter of < 2 nm are one of the promising substitutes of Pt-NPs; however, it is still a challenge to synthesize such a small-sized Au-NPs with a narrow diameter distribution on a carbon support without using capping agents. We here describe a facile method to deposit uniform Au-NPs (diameter = 1.6 nm and 3.3 nm) on the stacked-graphene (< 10 layers) coated with poly[2,2'-(2,6-pyridine)-5,5'-bibenzimidazole] without using any capping agents. The obtained Au-NPs exhibit an excellent ORR activity with the onset potential at-0.11 V and-0.09 V (vs. Ag/AgCl) for 1.6 nm and 3.3 nm, respectively. On the other hand, inhomogeneous Au-NPs with 4.6 nm in average diameter shows the onset potential at-0.15 V (vs. Ag/AgCl).",
author = "Tsuyohiko Fujigaya and Chaerin Kim and Yuki Hamasaki and Naotoshi Nakashima",
note = "Funding Information: The authors gratefully acknowledge Mr. H. Matsumoto and Mr. T. Sato of Hitachi High-Technologies Corporation for the measure-ments of the SEM/STEM dual monitoring. This study was supported in part by the project “Advanced Research Program for Energy and Environmental Technologies” commissioned by the New Energy and Industrial Technology Development Organization (NEDO), the Low-Carbon Research Network (LCnet), Grant-in-aid for JSPS Research Fellow (No. 268220 for C. K. and No. 15J04604 for Y. H.) the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan and the Nanotechnology Platform Project (Molecules and Materials Synthesis) of the MEXT, Japan. A part of this research was supported by the Adaptable and Seamless Technology Transfer Program through Target-driven R&D, JST (AS242Z00200L) and the Advanced Low Carbon Technology Research and Development Program (ALCA) and by The Japan Science and Technology Agency (JST) through its “Center of Innovation Science and Technology based Radical Innovation and Entrepreneurship Program (COI Program).",
year = "2016",
month = feb,
day = "22",
doi = "10.1038/srep21314",
language = "English",
volume = "6",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
}