Variations in the structure and electrochemical characteristics of membrane electrode assemblies during the endurance testing of hydrogen-air fuel cells

Autor:	A. D. Aliev, A. V. Kapustin, B. A. Ivanitskii, A. E. Chalykh, M. P. Tarasevich, L. P. Kazanskii, V. A. Bogdanovskaya, O. V. Korchagin, V. B. Avakov, I. K. Landgraf
Rok vydání:	2015
Předmět:	Materials science Hydrogen Inorganic chemistry chemistry.chemical_element Electrochemistry Catalysis Corrosion chemistry.chemical_compound Membrane chemistry Chemical engineering Nafion Electrode Physical and Theoretical Chemistry Platinum
Zdroj:	Russian Journal of Physical Chemistry A. 89:887-893
ISSN:	1531-863X 0036-0244
Popis:	Variations in the characteristics of a membrane-electrode assembly (MEA) are studied during the endurance testing of a hydrogen-air fuel cell (FC) based on a Nafion 212 proton conducting membrane and platinum catalysts. It is shown that the voltage drop observed during MEA testing was mainly due to physicochemical transformations of the cathode catalyst, i.e., the oxidation of platinum and its subsequent recrystallization with nanoparticle coarsening. It is established that the rate of degradation increases along with temperature and loading, and with periodic FC depressurization. It is concluded that the enhancing effects of additional factors of degradation, e.g., platinum ion transport to the proton-conducting membrane and corrosion of the carbon carrier, were responsible for these processes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3b13136e7123d4ad06a699f7dd5f54b2 https://doi.org/10.1134/s0036024415050064 Zobrazit plný text záznamu Full text from SpringerLink