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).
| Original language | English |
|---|---|
| Article number | 21314 |
| Journal | Scientific reports |
| Volume | 6 |
| DOIs | |
| Publication status | Published - Feb 22 2016 |
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All Science Journal Classification (ASJC) codes
- General
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Growth and Deposition of Au Nanoclusters on Polymer-wrapped Graphene and Their Oxygen Reduction Activity. / Fujigaya, Tsuyohiko; Kim, Chaerin; Hamasaki, Yuki; Nakashima, Naotoshi.
In: Scientific reports, Vol. 6, 21314, 22.02.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Growth and Deposition of Au Nanoclusters on Polymer-wrapped Graphene and Their Oxygen Reduction Activity
AU - Fujigaya, Tsuyohiko
AU - Kim, Chaerin
AU - Hamasaki, Yuki
AU - Nakashima, Naotoshi
PY - 2016/2/22
Y1 - 2016/2/22
N2 - 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).
AB - 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).
UR - http://www.scopus.com/inward/record.url?scp=84959431685&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84959431685&partnerID=8YFLogxK
U2 - 10.1038/srep21314
DO - 10.1038/srep21314
M3 - Article
AN - SCOPUS:84959431685
VL - 6
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 21314
ER -