Peculiarities of the Pt(Cu)/C catalyst formation by galvanic displacement of copper in H2PtCl4 solutions

Autor:	A. Yu. Filatov, Lada V. Yashina, Boris I. Podlovchenko, T. D. Gladysheva
Rok vydání:	2012
Předmět:	X-ray photoelectron spectroscopy Chemistry Inorganic chemistry Electrochemistry Galvanic cell chemistry.chemical_element Atomic ratio Electroplating Voltammetry Copper Catalysis
Zdroj:	Russian Journal of Electrochemistry. 48:173-180
ISSN:	1608-3342 1023-1935
Popis:	Specific features of the formation of a Pt(Cu) catalyst by the galvanic displacement of electroplated copper (carbon support) in a PtCl 4 2− solution are considered. The composition, the structure, and electrochemical properties of Pt(Cu) deposits in different stages of displacement are studied by a complex of methods (SEM, TEM, XPS, voltammetry, etc.). The gradual formation of a stable “core(Pt, Cu)-shell(Pt)” structure with the average atomic ratio Pt : Cu ≈ 3 : 1 is observed. The results for PtCl 4 2− are compared with the analogous results for PtCl 6 2− published earlier. Particularly, the reasons for the differences in the steady state potentials established on the Pt(Cu)st/C electrode in the presence of PtCl 4 2− and PtCl 6 2− are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8fa5900e20c3caa918390692fe413fb9 https://doi.org/10.1134/s1023193512020139 Zobrazit plný text záznamu Full text from SpringerLink