Niether, C.C.NietherRau, M.S.M.S.RauCremers, CarstenCarstenCremersJones, D.J.D.J.JonesPinkwart, KarstenKarstenPinkwartTübke, JensJensTübke2022-03-052022-03-052015https://publica.fraunhofer.de/handle/publica/24015010.1016/j.jelechem.2015.04.002A new set-up for conducting differential electrochemical mass spectroscopy (DEMS) analysis at temperatures between 120 and 180 °C is presented. It enables the characterization and testing of model electrodes in a three electrode assembly under experimental conditions close to those in a high temperature proton exchange membrane fuel cell (HT-PEMFC). This is of special interest for the study of the degradation of fuel cell materials as well as the electro-oxidation reactions of small organic molecules used in direct alcohol fuel cells (DAFCs). While other DEMS set-ups only allow for studying reactions occurring in a liquid electrolyte, the HT-DEMS set-up makes it possible to study reactions in the gas phase. The design of the set-up is presented. Cyclic voltammetry (CV) measurements at 150 °C were carried out on Pt/C and Pt black catalysts under nitrogen atmosphere. Oxidation of adsorbed CO and bulk oxidation of ethanol were performed on Pt/C.en543journal article