Electrochemical zinc insertion into W{sub 18}O{sub 49}: Synthesis and characterization of new bronzes
- Instituto de Ingenieria Civil, Facultad de Ingenieria Civil, Universidad Autonoma de Nuevo Leon, Apartado Postal 17, San Nicolas de los Garza, N.L. (Mexico)
- Departamento de Quimica, Universidad San Pablo-CEU, Urb. Monteprincipe, 28668 Boadilla del Monte, Madrid (Spain)
- Laboratoire Leon Brillouin (CEA-CNRS), Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette Cedex (France)
Divalent zinc ions have been electrochemically inserted into W{sub 18}O{sub 49}, producing zinc bronzes. Under our experimental conditions, W{sub 18}O{sub 49} accepts zinc reversibly as a guest up to 0.9 ions per formula. The reaction seems to proceed through the formation of a solid solution in which the W-O framework of the parent oxide is maintained. The location of the Zn{sup 2+} ions in the framework of W{sub 18}O{sub 49} has been determined by neutron diffraction on a chemically prepared sample having the composition Zn{sub 0.34}W{sub 18}O{sub 49}. As a main result, we found that Zn prefers to insert in one of the four types of quadrangular tunnels. More precisely, it is displaced from the center to occupy a low coordination site. This result indicates that a significant covalent character exists in the Zn-O bond. - Graphical Abstract: The structure of Zn{sub 0.36}W{sub 18}O{sub 49} projected along the b-axis.
- OSTI ID:
- 20721718
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 10 Vol. 178; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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