1. Université Lille Nord de France, UMR 8181 CNRS, Unité de
Catalyse et de Chimie du Solide (UCCS USTL), F-59655 Villeneuve d’Ascq, France
2. State
Key Laboratory of Rare Earth Resource Utilization, Changchun
Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
3. Inorganic
Chemistry, Faculty for Science and Technology, University of Siegen, 57068 Siegen, Germany