Enhanced catalytic stability through non-conventional synthesis of Ni/SBA-15 for methane dry reforming at low temperatures

Identification of Outer and Inner Nickel Particles in a Mesoporous Support: How the Channels Modify the Reducibility of Ni/SBA‐15 Catalysts

“…In agreement with previous works for similar catalyst preparations, the TPR profile of the Ni/SBA‐15‐ImU catalyst presents two main peaks, the first at about the same temperature range as massive NiO, and the second one at a higher temperature (around 540 °C). In a generic way, without additional evidence, this second peak has been previously ascribed by other authors to NiO in strong interaction with the silica support or in the interior of the mesoporous structure of SBA‐15 . On the other hand, the Ni/SBA‐15‐DP sample is dominated by a main peak centered at high temperature (660 °C), accompanied by a small and wide shoulder between 350 and 450 °C, once again approximately corresponding to the temperature reduction interval of massive NiO, whose TPR profile is also included in Figure .…”

“…Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under http://dx.NiO in strong interaction with the silica support or in the interior of the mesoporous structure of SBA-15. [7,9,10] On the other hand, the Ni/SBA-15-DPs ample is dominated by am ain peak centereda th igh temperature (660 8C), accompanied by as mall and wide shoulder between 350 and 450 8C, once again approximately corresponding to thet emperature reduction interval of massive NiO, whose TPR profile is also included in Figure 2. It is well-known [11,12] that during the DP preparation procedure the silicas urfaceo fSBA-15 is partially dissolved, leadingt ot he formation of as urface nickel silicate phase which, as previously reported, reducesa tt his hight emperature.After ar eductiont reatment with hydrogen at 750 8C, XRD (Supporting Information, Figure S1) showsi nb oth systems the formationo fam etallic nickel phase but with differentc rystallite sizes.…”

The influence of reduction temperature on the performance of ZrOx/Ni-MnOx/SiO2 catalyst for low-temperature CO2 reforming of methane

“…Besides, the sintering of Ni particles at high temperatures (above 600 • C) was another shortcoming for the utilization of nickel based catalysts [12]. Thus, lots of efforts had focused on the design and synthesis of coke resistant Ni catalyst with high activity [13].…”

Recent Scientific Progress on Developing Supported Ni Catalysts for Dry (CO2) Reforming of Methane

“…Recently, mesoporous silica and alumina has been received much attention as supports of Ni nanoparticles since Ni nanoparticles that are embedded in pores of those supports can exhibit good sintering resistance at high temperature [74][75][76][77][78][79]. Zhang et al demonstrated that mesoporous structure of SBA-15 can prevent sintering of monometallic Ni particles by confining their size inside the pores [74].…”