International Journal of Hydrogen Energy, Vol.45, No.32, 16133-16143, 2020
Anti-sintering mesoporous Ni-Pd bimetallic catalysts for hydrogen production via dry reforming of methane
In this work, a series of mesoporous silica supported nickel or nickel-palladium catalysts were synthesized and performed in dry reforming of methane (DRM) reaction for producing syngas. Compared with the monometallic catalyst, the Ni-Pd bimetallic catalysts, especially synthesized by the OA-assisted route, exhibited promising yields of H-2 and CO in the catalytic DRM reaction, achieved at 63% and 69% over NiPd-SP-OA bimetallic catalyst at the reaction temperature of 700 degrees C, respectively. TEM image results confirmed that no obvious sintering phenomenon happened on spent NiPd-SP-OA bimetallic catalyst within 1550 min time-on-stream reaction. Based on the results of XRD, XPS and H-2-TPR, it could be known that the superior catalytic performance on NiPd-SP-OA catalyst were main ascribed to the smaller-sized Ni nanoparticles with a uniform metal dispersion and a larger fraction of exposed active sites (Ni-0). (C) 2020 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.