Acetylene Contamination Mechanisms in the Cathode of Proton Exchange Membrane Fuel Cells

Zhai, Yunfeng; St-Pierre, Jean

doi:10.1002/celc.201600666

Title: Acetylene Contamination Mechanisms in the Cathode of Proton Exchange Membrane Fuel Cells

Journal Article · Thu Jan 05 00:00:00 EST 2017 · ChemElectroChem

DOI:https://doi.org/10.1002/celc.201600666· OSTI ID:1533131

^[1]; St-Pierre, Jean ^[1]

Univ. of Hawaii at Manoa, Honolulu, HI (United States)

Abstract The catalytic reactions of acetylene in contact with air, the electrochemical reactions of acetylene under different potentials, and the contamination reactions of acetylene in an operated proton exchange membrane fuel cell were investigated by using gas chromatography (GC), chronoamperometry, and cyclic voltammetry (CV) techniques. The GC results indicate that carbon dioxide is the catalytic reaction product of acetylene in the cathode and an electro‐oxidation product at high potentials, and it can desorb easily. Ethylene, ethane, and methane are the electrochemical reduction products of acetylene at low cathode potentials, and they can desorb easily. The CV analysis suggests the electroreduction intermediates are vinylidene and ethylidyne at low potentials and electro‐oxidation intermediates CO (or COH‐type species) at high potentials. In an operating fuel cell, acetylene reactions in the cathode include not only catalytic reactions, but also electrochemical redox reactions. According to these catalytic and electrochemical reactions, acetylene contamination mechanisms and possible effective contamination mitigation strategies are proposed.

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Research Organization:: Univ. of Hawaii, Honolulu, HI (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE); US Department of the Navy, Office of Naval Research (ONR)

Grant/Contract Number:: EE0000467; N00014-13-1-0463

OSTI ID:: 1533131

Alternate ID(s):: OSTI ID: 1401505

Journal Information:: ChemElectroChem, Vol. 4, Issue 3; ISSN 2196-0216

Publisher:: ChemPubSoc EuropeCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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Title: Acetylene Contamination Mechanisms in the Cathode of Proton Exchange Membrane Fuel Cells

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