An FeCrAl-fiber-structured NiO-MgO-Al2O3 nanocomposite catalyst engineered from nano- to macro-scale in one-step is developed via thermally decomposing NiMgAl layered double hydroxides (LDHs) that can be grown onto the FeCrAl-fiber only through a γ-Al2O3/water interface-assisted method. By taking advantages of homogeneous component-distribution in the LDHs-derived NiO-MgO-Al2O3 nanocomposites and enhanced heat transfer, this promising catalyst delivers satisfying performance with enhanced coking/sintering resistance in the title reaction. At 800 °C and a gas hourly space velocity of 5000 mL g–1 h–1, CH4/CO2 conversion maintains almost constant at 91%/89% within the initial 90 h and then slides in a smooth downturn (to 80/85%) within another 180 h of reaction.

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core−shell catalysts engineered from micro-to macro-scale were highly efficiently synthesized via cost-effective steam-assisted crystallization (SAC) method. Impact of synthesis conditions on their morphology and textural/acidic properties was investigated by means of XRD, SEM, TEM, solid-state NMR, NH 3 -TPD, Py-IR and N 2 physisorption. Single-run lifetime of such structured catalysts for MTP process was strongly dependent on their preparation conditions but slightly the product distribution. A volcano-like relationship for lifetime was observed against the SAC time, which was correlated well with the crystallization-time-dependent crystallinity, mesoporosity and crystal size. The promising SS-

Catalytic oxymethane reforming is an effective and efficient route to produce syngas, but the commonly used Ni catalysts suffer from coke deposition, Ni sintering, and heat-transfer limitations. AN i-foam-structuredN iO-MgO-Al 2 O 3 nanocomposite catalystw as developed by thermal decomposition of NiMgAl layered double hydroxides (LDHs) in situ hydrothermally grown onto the Ni-foam. Originating from the lattice orientation effect and topotacticd ecomposition of the LDH precursor, NiO, MgO, and Al 2 O 3 are highly distributed in the nanocomposite, and thus, this catalyst shows enhanced resistance to coke and sintering. At 700 8Ca nd ag as hourly space velocity of 100 Lg À1 h À1 ,8 6.5 %m ethane conversion ands electivities of 91.8/88.0% to H 2 /CO are achieved with stabilityf or at least 200 h. We believe this type of tailorings trategy and the as-obtained materials can open up new opportunities for future applicationsi no ther high-throughput and high-temperature reactions.Syngas( am ixture of CO and H 2 )p roduction from methane is ap rerequisite process for industrial transformation of methane into fuels and other chemicals of particular importance. [1,2] The current method by which the majority of syngas is produced relies on the steam reforming of methane (SRM),b ut the strong CÀHb onds in methane make this route energy-and equipment-capital intensive, and the H 2 /CO ratio from this route is only suitable for downstream processes requiring aH 2rich feed. [3] Relative to the SRM, catalytic oxymethane reforming (COMR) could be ag ood alternative owing to itsh igh energy efficiency,c ompactr eactor, and suitable H 2 /CO ratio straight from the reactor fort he downstream production of methanol and the Fischer-Tropschp rocess. [4] Oxide-supported Ni-based catalysts have been extensively investigated owing to their excellent performance and moder-ate cost, but they suffer from the critical problems of coke deposition and Ni sintering. [5] Therefore, many methods have been explored to maintain ap roperg rain size against sintering and to avoid coke depositionu nder the harsh reactionc onditions, and they commonly include the addition of promoters (e.g.,a lkali, alkaline earth, and rare earth metal oxides) or/and the utilization of different supports (e.g.,S iO 2 ,A l 2 O 3 ,Z rO 2 ,a nd Y 2 O 3 ). [6, 7] For instance, Özdemire tal. exhibited that the Ni-MgO/Al 2 O 3 catalystw as resistantt os intering and coke deposition for COMR. [8] Besides these attempts, layered double hydroxides (LDHs) have been evoking ever-increasing interest owing to their specific features, especially the highly uniform distribution of flexible and tunable metal ions in the hydroxide layers, which can be well maintained in their oxidized and/or reduced products because of their topotactic transformation. [9] Moriokae tal. reported that Ni-based catalysts derivedf rom NiCaAl-LDHss howed excellentc atalytic performance for COMR. [10] Zhang et al. prepared as eries of NiO-MgO-Al 2 O 3 -La 2 O 3 mixed oxidesa lso derived from LDHs and such ca...

Microfibrous-structured SS-fiber@HZSM-5 catalyst prepared by cost-effective and high-efficiency VPT method delivers remarkable improvement in selectivity and stability for the MTP reaction due to the improved diffusion in zeolite shell.