Nitrogen-doped reduced graphene oxide supports for noble metal catalysts with greatly enhanced activity and stability

被引：237

作者：

He, Daping ^{[1
]}

Jiang, Yulin ^{[1
]}

Lv, Haifeng ^{[1
]}

Pan, Mu ^{[1
]}

Mu, Shichun ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2013年 / 132卷

基金：

中国国家自然科学基金;

关键词：

Catalysts; Reduced graphene oxide; Nitrogen-doping; Oxygen reduction reaction; Proton exchange membrane fuel cells; OXYGEN REDUCTION REACTION; CARBON NITRIDE ELECTROCATALYSTS; METHANOL FUEL-CELLS; PLATINUM NANOPARTICLES; NANOTUBES; OXIDATION; NANOSTRUCTURES; GRAPHITE; PEMFCS; ROUTE;

D O I：

10.1016/j.apcatb.2012.12.005

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 reduced graphene oxide (NRGO) were investigated for use as proton exchange membrane fuel cell catalysts. Artfully, NRGO was synthesized using a lyophilisation-assisted N-doping method, and simultaneous reduction of graphene oxide (GO) was achieved. A nitrogen content as high as 5.06% was obtained with pyridinic-N as the dominant nitrogen species. Pt nanoparticles with an average diameter of 2.5 nm were uniformly loaded on NRGO using impregnation methods. Both cyclic voltammetry and oxygen reduction reaction (ORR) measurements revealed a higher catalytic activity and lower losses of the electrochemically active surface area of this novel Pt/NRGO catalyst in comparison to those of the Pt/GO and conventional Pt/C catalysts. Significantly, the catalytic activity of the Pt/NRGO in ORR showed almost no degradation even after 1000 potential cycles, indicating that our new catalysts have excellent stability. A mechanism for improving the ORR activity and the stability of the Pt/NRGO was tentatively proposed and discussed. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：379 / 388

页数：10

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