caa a22 4500 606174508 CHVBK 20210128100738.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s11244-015-0490-x doi (NATIONALLICENCE)springer-10.1007/s11244-015-0490-x Dry Reforming of Methane: Catalytic Performance and Stability of Ir Catalysts Supported on γ-Al2O3, Zr0.92Y0.08O2−δ (YSZ) or Ce0.9Gd0.1O2−δ (GDC) Supports [Elektronische Daten] [I. Yentekakis, G. Goula, P. Panagiotopoulou, A. Katsoni, E. Diamadopoulos, D. Mantzavinos, A. Delimitis] The impact of the support on the Ir-catalyzed dry (CO2) reforming of methane (DRM) reaction is explored in the present study. With this aim, supported iridium catalysts Ir/γ-Al2O3, Ir/YSZ and Ir/GDC with 1wt% iridium loading, using γ-Al2O3, 8mol% Y2O3 stabilized ZrO2 (YSZ: Zr0.92Y0.08O2−δ) and 10mol% Gd2O3 doped CeO2 (GDC: Ce0.9Gd0.1O2−δ) as supports were comparatively studied in the temperature range of 400-850°C. The feasibility of tuning the catalytic performance and/or stability of the Ir active phase during DRM reaction, via support-induced interactions, was investigated. All catalysts were found to be extremely active and stable over time on stream. No significant effects induced by the support were observed at the high operating temperature of DRM. However, opposite to Ir/γ-Al2O3 and Ir/YSZ samples, Ir/GDC provides the benefit to be stable in oxidation steps and/or oxidation-reduction cycles. This is of significant practical importance since such treatment procedures are often used in practice for catalysts regeneration. Besides catalytic performance measurements, extended hydrogen temperature-programmed reduction experiments, supported further by transmission electron microscopy characterization studies were carried out in order to reveal the impact of the support on the aforementioned stability and its origin. Springer Science+Business Media New York, 2015 Dry reforming of methane nationallicence Yttria stabilized zirconia nationallicence Gadolinia doped ceria nationallicence Iridium nationallicence Catalyst stability nationallicence Yentekakis I. Laboratory of Physical Chemistry & Chemical Processes (www.pccplab.tuc.gr), School of Environmental Engineering, Technical University of Crete, 73100, Chania, Crete, Greece aut Goula G. Laboratory of Physical Chemistry & Chemical Processes (www.pccplab.tuc.gr), School of Environmental Engineering, Technical University of Crete, 73100, Chania, Crete, Greece aut Panagiotopoulou P. Laboratory of Physical Chemistry & Chemical Processes (www.pccplab.tuc.gr), School of Environmental Engineering, Technical University of Crete, 73100, Chania, Crete, Greece aut Katsoni A. Laboratory of Physical Chemistry & Chemical Processes (www.pccplab.tuc.gr), School of Environmental Engineering, Technical University of Crete, 73100, Chania, Crete, Greece aut Diamadopoulos E. Laboratory of Physical Chemistry & Chemical Processes (www.pccplab.tuc.gr), School of Environmental Engineering, Technical University of Crete, 73100, Chania, Crete, Greece aut Mantzavinos D. Department of Chemical Engineering, University of Patras, 26500, Patras, Greece aut Delimitis A. Chemical Process & Energy Resources Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 6th Km. Charilaou-Thermi Rd., 57001, Thermi, Thessaloniki, Greece aut Topics in Catalysis Springer US; http://www.springer-ny.com 58/18-20(2015-11-01), 1228-1241 1022-5528 58:18-20<1228 2015 58 11244 https://doi.org/10.1007/s11244-015-0490-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11244-015-0490-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yentekakis I. Laboratory of Physical Chemistry & Chemical Processes (www.pccplab.tuc.gr), School of Environmental Engineering, Technical University of Crete, 73100, Chania, Crete, Greece aut NATIONALLICENCE 700 1- Goula G. Laboratory of Physical Chemistry & Chemical Processes (www.pccplab.tuc.gr), School of Environmental Engineering, Technical University of Crete, 73100, Chania, Crete, Greece aut NATIONALLICENCE 700 1- Panagiotopoulou P. Laboratory of Physical Chemistry & Chemical Processes (www.pccplab.tuc.gr), School of Environmental Engineering, Technical University of Crete, 73100, Chania, Crete, Greece aut NATIONALLICENCE 700 1- Katsoni A. Laboratory of Physical Chemistry & Chemical Processes (www.pccplab.tuc.gr), School of Environmental Engineering, Technical University of Crete, 73100, Chania, Crete, Greece aut NATIONALLICENCE 700 1- Diamadopoulos E. Laboratory of Physical Chemistry & Chemical Processes (www.pccplab.tuc.gr), School of Environmental Engineering, Technical University of Crete, 73100, Chania, Crete, Greece aut NATIONALLICENCE 700 1- Mantzavinos D. Department of Chemical Engineering, University of Patras, 26500, Patras, Greece aut NATIONALLICENCE 700 1- Delimitis A. Chemical Process & Energy Resources Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 6th Km. Charilaou-Thermi Rd., 57001, Thermi, Thessaloniki, Greece aut NATIONALLICENCE 773 0- Topics in Catalysis Springer US; http://www.springer-ny.com 58/18-20(2015-11-01), 1228-1241 1022-5528 58:18-20<1228 2015 58 11244