Synthesis of Birdcage-type zeolite encapsulating ultrafine Pt nanoparticles and its application in dry reforming of methane

Ultra-durable Ni-Ir/MgAl2O4 catalysts for dry reforming of methane enabled by dynamic balance between carbon deposition and elimination

“…Dry reforming of methane (DRM) is a primary method for producing syngas (a mixture of CO and H2) that acts as a key platform for the industrial production of fuels and chemicals [1][2][3][4][5] . Among group VIII metals [6][7][8][9][10] , low-cost Ni has drawn the most attention for DRM because of its strong CH4 dissociation ability, which endows Ni with an excellent catalytic performance of DRM [11][12][13][14][15] . However, Ni-based catalysts suffer from serious carbon deposition and metal sintering issues under the high-temperature condition of DRM (700-1000 °C), which limits their large-scale application [16][17][18][19][20] .…”

Zeolite confinement-catalyzed cleavage of C–O/C–C bonds in biomass

“…An encapsulated metal@zeolite generally has higher stability than the corresponding supported metal/zeolite due to the space limitation of the metal caused by the pore size of the zeolite. 173 For example, although a certain degree of aggregation occurs after several cycles under harsh conditions (oxidation–reduction at 650 °C) for Pt clusters encapsulated in MWW zeolite, the aggregated nanoclusters are generally below 2 nm 123 (Fig. 18a–c).…”

Developing Silicalite-1 Encapsulated Ni Nanoparticles as Sintering-/Coking-Resistant Catalysts for Dry Reforming of Methane

“…By comparison, silicalite-1 encapsulated Pt NPs (<2 nm) prepared by a water-in-oil microemulsion successfully achieved the full encapsulation structure, that is, most Pt NPs was encapsulated within the zeolite. However, the collapse of zeolite structure at > 620 • C caused a decreased accessibility of active sites to the reactant, and hence severe deactivation at high reaction temperatures [23]. Hence, systematic insights into the synthesis-structureperformance relationships in the encapsulated metal NPs (within zeolite crystals) catalysts are needed for the rational development of stable and high-performing catalysts for DRM.…”