1. Institute
of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
2. Chemical
Engineering Department, Delft University of Technology, Van der
Maasweg 9, NL-2629 HZ Delft, The Netherlands
3. Materials Research & Development, Toyota Motor Europe, Hoge Wei 33, B-1930 Zaventem, Belgium