Pulsed voltammetric detection of arsenic(III) at platinum electrodes in acidic media

Autor:	Douglas G. Williams, Dennis C. Johnson
Rok vydání:	1992
Předmět:	chemistry.chemical_compound Passivation chemistry Radical Electrode Inorganic chemistry Oxide chemistry.chemical_element Staircase voltammetry Electrochemistry Platinum Voltammetry Analytical Chemistry
Zdroj:	Analytical Chemistry. 64:1785-1789
ISSN:	1520-6882 0003-2700
Popis:	The oxidation of As(OH) 3 at Pt is belleved to occur by an anodic oxygen-transfer mechanism that involves anodic discharge of H 2 O to form adsorbed hydroxyl radicals (PtOH); however, anodic conversion of PtOH to the inert oxide (PtO) results in severe passivation of the electrode surface. Hence, a transport-kimited response is not obtained at a Pt rotated-disk electrode by conventional linear scan or staircase voltammetry
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::958e367158c5482bcbe918d6fc204316 https://doi.org/10.1021/ac00041a009 Zobrazit plný text záznamu