Premium
Front Cover: Niobium, Tantalum, and Tungsten Doped Tin Dioxides as Potential Support Materials for Fuel Cell Catalyst Applications (Z. Anorg. Allg. Chem. 18/2020)
Author(s) -
Stöwe Klaus,
Weber Maximilian
Publication year - 2020
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202070181
Subject(s) - tetragonal crystal system , tin , front cover , crystallography , tungsten , materials science , octahedron , ion , anatase , crystal structure , lone pair , niobium , tantalum , rutile , pnictogen , chemistry , catalysis , metallurgy , cover (algebra) , superconductivity , condensed matter physics , molecule , physics , mechanical engineering , organic chemistry , engineering , biochemistry , photocatalysis
The cover picture shows a hypothetical clustering of three Sn 2+ ions ( Sn '' Sn ) with stereochemically active lone pairs around an O 2– vacancy ( V O ∙∙ ) in the tetragonal rutile‐type structure of SnO 2 with octahedral coordination of the tin ions. Each O 2– ion is trigonal planar coordinated by three Sn 2+ / 4+ ions as well as 11 O 2– in the tetragonal close packing of the rutile structure‐type. Internal redox reactions between Ta 5+ /Ta 4+ and Sn 4+ /Sn 2+ and possibilities to reduce the electrostatic repulsion between cations on introduction of anion vacancies into the crystal structure are also indicated. More details can be found in the Article by Klaus Stöwe, and Maximilian Weber on page 1470 ff.