[1] Forschungszentrum Julich, Inst Energy & Climate Res, Electrochem Proc Engn IEK 3, Wilhelm Johnen Str, D-52428 Julich, Germany
[2] Friedrich Alexander Univ Erlangen Nurnberg, Lehrstuhl Chem Reakt Tech, Egerlandstr 3, D-91058 Erlangen, Germany
[3] Forschungszentrum Julich, Helmholtz nst Erlangen Nurnberg Renewable Energy, Egerlandstr 3, Erlangen, Germany
[4] Rhein Westfal TH Aachen, Fac Mech Engn, Chair Fuel Cells, D-52072 Aachen, Germany