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Poisoning the Oxygen Reduction Reaction on Carbon-Supported Fe and Cu Electrocatalysts: Evidence for Metal-Centered Activity

Thorum, Matthew S., Hankett, Jeanne M., Gewirth, Andrew A.·2011·The Journal of Physical Chemistry Letters

Abstract

Whether or not the active sites for the oxygen reduction reaction (ORR) in electrocatalysts based on carbon-supported transition-metal complexes are metal-centered has become controversial, especially for heat-treated materials. Some have proposed that the transition metal only serves to form highly active sites based on nitrogen and carbon. Here, we examine the oxygen reduction activity of carbon-supported iron(II) phthalocyanine (FePc) before and after pyrolysis at 800 °C and a carbon-supported copper(II) complex with 3,5-diamino-1,2,4-triazole (CuDAT) in the presence of several anions and small-molecule poisons, including fluoride, azide, thiocyanate, ethanethiol, and cyanide. CuDAT is poisoned in a manner consistent with a Cu-based active site. Although FePc and pyrolyzed FePc are remarkably resilient to most poisons, they are poisoned by cyanide, indicative of Fe-based active sites.

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Metadata

Authors
Thorum, M. S., Hankett, J. M., & Gewirth, A. A.
Venue
The Journal of Physical Chemistry Letters
Published
2011-01-24
Volume
2
Issue
4
Pages
295-298
ISSN
1948-7185 (ISSN-L)
OpenAlex
W2327305035
Cited by
309
References
0
FWCI
4.33
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Poisoning the Oxygen Reduction Reaction on Carbon-Supported Fe and Cu Electrocatalysts: Evidence for Metal-Centered Activity. https://app.cochat.ai/papers/10.1021/jz1016284
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Thorum, M. S., Hankett, J. M., & Gewirth, A. A. (2011). Poisoning the Oxygen Reduction Reaction on Carbon-Supported Fe and Cu Electrocatalysts: Evidence for Metal-Centered Activity. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/jz1016284

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