Three kinds of Ni catalysts loaded on SBA-15 were prepared by impregnation method, adding NH3 center dot H2O or C2H2O4 in the impregnant, and applied to CO2 reforming (DRM) of methane to generate hydrogen at 750 degrees C. The results showed that the catalyst prepared with NH3 center dot H2O addition exhibited high activity and stability. TEM, H-2-TPR, XPS, XRD, and TG-MS characterization indicated that with addition of NH3 center dot H2O (0.1 mol L-1) in the preparation process, small nickel oxide particles, with average size of about 7 nm, were obtained on the catalyst, and the strong association between support and Ni species made them uniformly dispersed, enabling the capacity to resist carbon deposition and metal sintering, which contributed to the excellent activity, stability and selectivity for the DRM to H-2 production. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.