Does CO poison Fe-based catalysts for ORR?

被引：129

作者：

Birry, Laurent ^{[1
]}

Zagal, Jose H. ^{[2
]}

Dodelet, Jean-Pol ^{[1
]}

机构：

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

[2] Univ Santiago de Chile, Fac Quim & Biol, Santiago, Chile

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2010年 / 12卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Fuel cell; Non-noble metal catalyst; CO; Oxygen reduction; OXYGEN REDUCTION REACTION; X-RAY-ABSORPTION; HIGH-AREA CARBON; FUEL-CELLS; BINDING; ELECTROCATALYSTS; ELECTROLYTE; PORPHYRINS; MONOXIDE; O-2;

D O I：

10.1016/j.elecom.2010.02.016

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Catalysts for the oxygen reduction reaction (ORR) were prepared on carbon black (C) using Fe(II)phthalocyanine (FePc) and CI-Fe(III)tetramethoxyphenylporphyrin (CIFeTMPP), as Fe precursors with and without a pyrolysis step at 800 degrees C. CO poisoning of the ORR catalytic sites for all these Fe/N/C electrocatalysts was attempted at pH 1 and 13, but to no avail, even if an iron ion is known to occupy the center of the active sites in at least the unpyrolyzed FePc/C or CIFeTMPP/C. The exact nature of the active center of these Fe-based heat-treated catalysts may still be a subject of debate but, in light of the absence of CO poisoning for unpyrolyzed FePc/C and CIFeTMPP/C, resistance to CO poisoning by the heat-treated catalysts cannot be used as evidence that the active center of their catalytic site is devoid of iron. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：628 / 631

页数：4

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