28. Gandia LM, Vicente MA, Gil A, Rodriguez F, Unger K (2002) Stud Surf Sci Catal 144:585 29. Gil A, Vicente MA, Gandía LM (2000) Microporous Mesoporous Mater 34:115 30. Yang Y, Li W, Xu H (2002) React Kinet Catal Lett 77:155 31. Wang S, Zhu HY, Lu GQ (1998) J Colloid Interface Sci 204:128 32. Rostrup-Nielsen JR (1993) Catal Today 18:305 33. Kim D, Stöwe K, Müller F, Maier F (2007) J Catal 247:101 34. Xu G, Shi K, Gao Y, Xu H, Wei Y (1999) J Mol Catal A 147:47 Figure captions Figure 1. N2 Adsorption: (a). Isotherms and (b). BJH pore size distribution Figure 2. SEM images: (a) SC, (b) PC and (c) DC Figure 3. TEM images: (a) PC and (b)DC. There is an enlargement on the right side of each image Figure 4. High resolution XPS spectra for catalysts: (a) Ni2p zone and (b) Ce3d zone Figure 5. TEM images of different zones of 3CeDC reduced catalyst. EDX was employed for Ni and CeO2 particles identification Figure 6. Catalytic experiments (700 °C, 40/40 CH4/CO2 and 96 (a) CH4 L g−1 h−1): conversion and (b) CO2 conversion Figure 7. SEM image of 3CeDC spent catalyst Table 1 Table 1 Textural parameters of solids Starting Pillared Delaminated Delaminated Delaminated Parameter clay clay clay (700 °C) (800 °C)
28. Gandia LM, Vicente MA, Gil A, Rodriguez F, Unger K (2002) Stud Surf Sci Catal 144:585 29. Gil A, Vicente MA, Gandía LM (2000) Microporous Mesoporous Mater 34:115 30. Yang Y, Li W, Xu H (2002) React Kinet Catal Lett 77:155 31. Wang S, Zhu HY, Lu GQ (1998) J Colloid Interface Sci 204:128 32. Rostrup-Nielsen JR (1993) Catal Today 18:305 33. Kim D, Stöwe K, Müller F, Maier F (2007) J Catal 247:101 34. Xu G, Shi K, Gao Y, Xu H, Wei Y (1999) J Mol Catal A 147:47 Figure captions Figure 1. N2 Adsorption: (a). Isotherms and (b). BJH pore size distribution Figure 2. SEM images: (a) SC, (b) PC and (c) DC Figure 3. TEM images: (a) PC and (b)DC. There is an enlargement on the right side of each image Figure 4. High resolution XPS spectra for catalysts: (a) Ni2p zone and (b) Ce3d zone Figure 5. TEM images of different zones of 3CeDC reduced catalyst. EDX was employed for Ni and CeO2 particles identification Figure 6. Catalytic experiments (700 °C, 40/40 CH4/CO2 and 96 L g−1 h−1): (a) CH4 conversion and (b) CO2 conversion Figure 7. SEM image of 3CeDC spent catalyst Table 1 Table 1 Textural parameters of solids Parameter Starting clay Pillared clay Delaminated clay Delaminated (700 °C) Delaminated (800 °C)