Ultrahigh oxygen reduction activity of Pt/nitrogen-doped porous carbon microspheres prepared via spray-drying

被引：34

作者：

Balgis, Ratna ^{[1
]}

Anilkumar, Gopinathan M. ^{[2
]}

Sago, Sumihito ^{[2
]}

Ogi, Takashi ^{[1
]}

Okuyama, Kikuo ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Engn, Dept Chem Engn, Higashihiroshima, Hiroshima 7398527, Japan

[2] Noritake Co Ltd, Ctr Res & Dev, Higashiyama Ku, Miyoshi, Aichi 4700293, Japan

来源：

JOURNAL OF POWER SOURCES | 2013年 / 229卷

关键词：

Spray drying; Oxygen reduction reaction; Nitrogen doped carbon; Pt nanoparticle; Electrocatalyst; ORDERED MESOPOROUS CARBON; PLATINUM NANOPARTICLES; FACILE SYNTHESIS; FUEL-CELLS; NITROGEN; CATALYSTS; ELECTROCATALYST; PARTICLES; PYROLYSIS; MECHANISM;

D O I：

10.1016/j.jpowsour.2012.11.143

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pt nanoparticles supported on nitrogen-doped porous carbon microspheres (Pt/C-N) were synthesized via an in-situ spray-drying technique followed by calcination. The addition of ammonium hydroxide had a remarkable influence on the solution chemistry, which promoted the simultaneous formation of metallic Pt and nitrogen doping onto carbon support material. Furthermore, the precursor pH influenced the subsequent oxygen reduction activity of the product. Ultrahigh oxygen reduction reaction (ORR) activity was recorded for a catalyst prepared at a precursor pH of 8.4 with mass activity and specific activity were 564 mA mg(-1) Pt and 834 mu A cm(-2) Pt, respectively. This investigation resulted in an effective strategy to escalate the catalyst ORR during limited catalyst surface area enhancement (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：58 / 64

页数：7

共 34 条

[21] Controllable Deposition of Platinum Nanoparticles on Graphene As an Electrocatalyst for Direct Methanol Fuel Cells [J].