pH-effect on oxygen reduction activity of Fe-based electro-catalysts

被引：113

作者：

Meng, Hui ^{[1
]}

Jaouen, Frederic ^{[1
]}

Proietti, Eric ^{[1
]}

Lefevre, Michel ^{[1
]}

Dodelet, Jean-Pol ^{[1
]}

机构：

[1] INRS Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Fuel cell; Non-precious metal; Catalyst; Alkaline; Rotating-ring-disk-electrode; ALKALINE FUEL-CELLS; ELECTROREDUCTION; ELECTROCATALYSTS; CATHODES; FE/N/C; SITES; PT/C; AG/C; ORR;

D O I：

10.1016/j.elecom.2009.08.035

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Recently, our group reported on an innovative synthesis of Fe/N/C-catalysts that considerably increased their activity for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). This work investigates the ORR-activity in 0.1 M KOH and 0.1 M HClO4 of one such new Fe/N/C-catalyst prepared by ball-milling and compares it to that of a former Fe/N/C-catalyst prepared by impregnation and to that of 46 wt% Pt/C. At pH 13, the volumetric activities at 0.9 V vs. RHE of the ball-milling Fe/N/C-catalyst, the impregnation Fe/N/C-catalyst and 46 wt% Pt/C are 3.2, 0.3 and 14.8 A cm(-3), respectively. The ball-milling Fe/N/C-catalyst is promising for alkaline fuel cells. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1986 / 1989

页数：4

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