title: Mass Spectrometry of Polymer Electrolyte Membrane Fuel Cells.
abstract: The chemical analysis of processes inside fuel cells under operating conditions in either direct or inverted (electrolysis) mode and their correlation with potentiostatic measurements is a crucial part of understanding fuel cell electrochemistry. We present a relatively simple yet powerful experimental setup for online monitoring of the fuel cell exhaust (of either cathode or anode side) downstream by mass spectrometry. The influence of a variety of parameters (composition of the catalyst, fuel type or its concentration, cell temperature, level of humidification, mass flow rate, power load, cell potential, etc.) on the fuel cell operation can be easily investigated separately or in a combined fashion. We demonstrate the application of this technique on a few examples of low-temperature (70°C herein) polymer electrolyte membrane fuel cells (both alcohol- and hydrogen-fed) subjected to a wide range of conditions.
authors.affiliation: Department of Surface and Plasma Science, Charles University in Prague, V Holesovickach 2, 180 00 Prague 8, Czech Republic.
authors.forename: Viktor
authors.identifier: 0000-0002-8833-5870
authors.initials: V
authors.lastname: Johánek
authors.affiliation: Department of Surface and Plasma Science, Charles University in Prague, V Holesovickach 2, 180 00 Prague 8, Czech Republic.
authors.forename: Anna
authors.initials: A
authors.lastname: Ostroverkh
authors.affiliation: Department of Surface and Plasma Science, Charles University in Prague, V Holesovickach 2, 180 00 Prague 8, Czech Republic.
authors.forename: Roman
authors.initials: R
authors.lastname: Fiala
authors.affiliation: Department of Surface and Plasma Science, Charles University in Prague, V Holesovickach 2, 180 00 Prague 8, Czech Republic.
authors.forename: Andrii
authors.initials: A
authors.lastname: Rednyk
authors.affiliation: Department of Surface and Plasma Science, Charles University in Prague, V Holesovickach 2, 180 00 Prague 8, Czech Republic.
authors.forename: Vladimír
authors.initials: V
authors.lastname: Matolín