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Molecular Beam-Thermal Desorption Spectrometry (MB-TDS) Monitoring of Hydrogen Desorbed from Storage Fuel Cell Anodes

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Author(s): Rui F. M. Lobo | Diogo M. F. Santos | Cesar A. C. Sequeira | Jorge H. F. Ribeiro

Journal: Materials
ISSN 1996-1944

Volume: 5;
Issue: 2;
Start page: 248;
Date: 2012;
Original page

Keywords: hydride electrode | hydrogen storage | fuel cell anode | thermal desorption spectrometry

ABSTRACT
Different types of experimental studies are performed using the hydrogen storage alloy (HSA) MlNi3.6Co0.85Al0.3Mn0.3 (Ml: La-rich mischmetal), chemically surface treated, as the anode active material for application in a proton exchange membrane fuel cell (PEMFC). The recently developed molecular beam—thermal desorption spectrometry (MB-TDS) technique is here reported for detecting the electrochemical hydrogen uptake and release by the treated HSA. The MB-TDS allows an accurate determination of the hydrogen mass absorbed into the hydrogen storage alloy (HSA), and has significant advantages in comparison with the conventional TDS method. Experimental data has revealed that the membrane electrode assembly (MEA) using such chemically treated alloy presents an enhanced surface capability for hydrogen adsorption.
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Tango Jona
Tangokurs Rapperswil-Jona