Redox transformations of simple vanadium phosphates: the synthesis of ε-VOPO4

Autor:	William T. A. Harrison, J.T. Vaughey, Allan J. Jacobson, Shiao C. Lim, Laurie L. Dussack, Jack W. Johnson
Rok vydání:	1996
Předmět:	Hydrogen Inorganic chemistry chemistry.chemical_element Vanadium General Chemistry Condensed Matter Physics Oxygen Redox chemistry Octahedron Hydrothermal synthesis General Materials Science Hydrogen spillover Platinum
Zdroj:	Solid State Ionics. 84:219-226
ISSN:	0167-2738
DOI:	10.1016/0167-2738(96)00007-0
Popis:	A reproducible high yield hydrothermal synthesis of VPO 4 · H 2 O that minimizes the amount of organic species adsorbed on the solid particles has been developed. Oxidation of VPO 4 · H 2 O at ≤ 550 °C in oxygen has been shown to result in the formation of a new VOPO 4 phase that has been designated e-VOPO 4 . This new VOPO 4 phase is structurally distinct but related to the structures of β-VOPO 4 and VPO 4 · H 2 O. All three phases contain chains of corner-shared vanadium oxygen atom octahedra that are bridged by phosphate groups. The fully oxidized e-VOPO 4 is reduced to VPO 4 · H 2 O at 150 °C by a topotactic reaction with hydrogen in the presence of platinum (‘hydrogen spillover’).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::48282f372e2aadae6cf0931463ebd89c https://doi.org/10.1016/0167-2738(96)00007-0 Zobrazit plný text záznamu Full Text from ScienceDirect