Growth and Deposition of Au Nanoclusters on Polymer-wrapped Graphene and Their Oxygen Reduction Activity

被引：36

作者：

Fujigaya, Tsuyohiko ^{[1
,2
]}

Kim, ChaeRin ^{[1
]}

Hamasaki, Yuki ^{[2
]}

Nakashima, Naotoshi ^{[1
,2
,3
]}

机构：

[1] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

[2] Kyushu Univ, Grad Sch Engn, Dept Appl Chem, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

[3] JST CREST, Chiyoda Ku, 5 Sanbancho, Tokyo 1020075, Japan

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

日本科学技术振兴机构;

关键词：

FUEL-CELL ELECTROCATALYST; GOLD NANOPARTICLES; CATALYTIC-ACTIVITY; CARBON NANOTUBES; SURFACTANT-FREE; METHANOL OXIDATION; POLYBENZIMIDAZOLE; CLUSTERS; SUPPORT; OXIDE;

D O I：

10.1038/srep21314

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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).

引用

页数：10

共 48 条

[1] STRUCTURAL EFFECTS IN ELECTROCATALYSIS - OXIDATION OF FORMIC-ACID AND OXYGEN REDUCTION ON SINGLE-CRYSTAL ELECTRODES AND THE EFFECTS OF FOREIGN METAL ADATOMS [J].