Autor:	P. Andreev, I. Nikolov, V. Najdenov, T. Vitanov, V. Nikolova
Rok vydání:	2000
Předmět:	Hydrogen General Chemical Engineering Limiting current Analytical chemistry chemistry.chemical_element Electrocatalyst Catalyst poisoning Catalysis chemistry.chemical_compound chemistry Tungsten carbide Specific surface area Materials Chemistry Electrochemistry Platinum
Zdroj:	Journal of Applied Electrochemistry. 30:705-710
ISSN:	0021-891X
DOI:	10.1023/a:1003813210270
Popis:	An amperometric study of gas-diffusion electrodes (GDE) catalysed by two types of tungsten carbide, WC(1) and WC(2), which differ considerably in their specific surface area (0.5 and 6 m2 g−1), was carried out. The H2–air gas mixture (H2 1–4%) measurements show that for this range of hydrogen concentration the hydrogen limiting diffusion current (id(H2)) may be attained so that a curve of limiting current density against hydrogen concentration can be obtained. The response and stability of the electrode performance were compared to those of platinum catalysed GDEs. The most promising for use in amperometric hydrogen sensing is the WC(1) catalyst of small specific surface area. Electrodes catalysed with this catalyst show inferior response time in comparison to electrodes catalysed with the other two catalysts (WC(2) and Pt) but their overall stability is much better.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::71dc5834ba4dbc6a87bae7942a3d3bde https://doi.org/10.1023/a:1003813210270 Zobrazit plný text záznamu Full text from SpringerLink