A nanofibrous catalyst for in the electrolyzer and methods of making the catalyst. The catalysts are composed of highly porous transition metal carbonitrides, metal oxides or perovskites derived from the metal-organic frameworks and integrated into a 3D porous nano-network electrode architecture. The catalysts are low-cost, highly active toward OER, with excellent conductivity yet resistant to the oxidation under high potential operable under both acidic and alkaline environments.

Electrically conductive, metal-organic framework (MOF) materials, methods of making the materials, and chemical sensors incorporating the materials are provided. The electrically conductive MOF materials are formed from mesoporous MOF crystals having continuous strands of electrically conductive inorganic oxides within their porous structures. The inorganic strands are formed by the condensed-phase grafting of molecular metal species onto MOF nodes.

This invention relates to a polymerization catalyst system comprising group 8 or 9 containing non-coordinating anion activator, a polymerization catalyst compound, optional support, and optional scavenger. Preferably, the activator comprises a compound represented by the formula: H.sub.s(L).sub.mM where M is a group 8 or 9 metal, s is 0 or 1, m 1, 2, 3, or 4, each L ligand is independently C≡O, NR.sub.3, PR.sub.3, where each R, independently is halogen, haloalkyl, or haloaryl) or optionally two or more L ligands may together form a multiply-valent ligand complex. Further, this invention relates to anon-coordinating anion activator represented by the formula: [Z.sub.d].sup.+[H.sub.sL.sub.mM].sup.d−, where M, s, m, L, are as defined above, d is 1, 2, or 3 and Z is (L′-H) or a reducible Lewis acid; L′ is a neutral Lewis base; H is hydrogen, and (L′-H) is a Bronsted acid. This invention also relates to a process for making a polymeric product comprising contacting a C2-C40 alpha-olefin feed with the polymerization catalyst system to obtain a polymerization reaction mixture; and obtaining a polymer product from the polymerization reaction mixture.

The present invention describes a catalyst composition for use as a catalyst system for an ethylene olisomerization, providing high activity and produce linear oligomer product having broad weight percent distribution i.e. C.sub.4 to C.sub.16. The catalyst composition comprises a zirconium amide compound, an organoaluminum compound and an additive. The present invention also provides a process for preparation of the zirconium amide compound comprising reacting a zirconium component having formula ZrX.sub.mnTHF, wherein X is halogen atom; m is an integer having value equal or less than 4 and n is a number equal or less than 2, and a substituted amide of formula RCONR′R″, wherein R, R′ and R″ are saturated or unsaturated aliphatic C.sub.1-C.sub.10 hydrocarbon or aromatic C.sub.6-C.sub.14 hydrocarbon, in the presence of an organic solvent.

Embodiments of the present disclosure directed towards polymerization catalysts having improved ethylene enchainment. As an example, the present disclosure provides a polymerization catalyst having improved ethylene enchainment, the polymerization catalyst comprising a zirconocene catalyst of Formula (I) where R.sub.1 is a C.sub.1 to C.sub.20 alkyl, aryl or aralkyl group, wherein R.sub.2 is an C.sub.1 to C.sub.20 alkyl, aryl or aralkyl group, and where R.sub.3 is a C.sub.1 to C.sub.20 alkyl or a hydrogen, and where each X is independently a halide, C.sub.1 to C.sub.20 alkyl, aralkyl group or hydrogen. ##STR00001##

A new family of Group IV transition metal catalytic compounds are provided, which are capable of catalysing the ROP of cyclic esters and cyclic amides to yield polymers of high molecular weight and narrow PDI. The new family of catalysts are surprisingly active not only in catalysing the ROP of lactones such as caprolactone, but also macrolactones (e.g. ω-pentadecalactone, PDL), where the reduced amount of ring strain would typically compromise efficient polymerisation. Also provided is a process for the ring opening polymerisation (ROP) of a cyclic ester or a cyclic amide employing the new catalytic compounds.

Catalyst support-activator for olefin polymerization catalysts, and processes for making, the support-activator comprising an intercalated, modified and calcined smectite clay comprising (a) pillars comprising aluminum and optionally: (i) at least one rare earth or lanthanide group metal; or (ii) at least one rare earth or lanthanide group metal and gallium; and (b) at least one ion-exchanged metal ion selected from the group consisting of aluminum, barium, beryllium, calcium, cerium, cesium, copper, chromium, gadolinium, gallium, germanium, hafnium, holmium, iron (II and III), lanthanum, lithium, magnesium, manganese, neodymium, potassium, praseodymium, rubidium, samarium, silver, selenium, sodium, strontium, tellurium, terbium, thallium, thorium, tin, titanium, uranium, ytterbium, yttrium, zinc and zirconium. The pillared clay exhibits a basal d.sub.100 spacing of: (A) 9 to 18 angstroms; or (B) equal to or greater than about 18.5 angstroms. Use of the modified clays, with metallocene catalyst precursor components, provides active olefin polymerization catalysts, preferably in the substantial absence of aluminoxanes or boron-containing compounds.

The present invention relates to a high-density ethylene-based polymer comprising an ethylene homopolymer or a copolymer of ethylene and at least one comonomer selected from the group consisting of an α-olefin, a cyclic olefin, and a straight, branched and cyclic diene. According to the present invention, the high-density polyethylene resin has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer of the present invention has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

Unsaturated and hydrogenated polyalpha-olefin products can be made with a high selectivity toward vinylidenes and tri-substituted vinylenes combined, a high selectivity toward vinylidenes, and a low selectivity toward 1,2-di-substituted vinylenes by using a catalyst system comprising a metallocene compound having the following structure in the polymerization reaction: ##STR00001##

Novel crystalline porous materials known as metal-organic frameworks (MOFs) and methods for their synthesis are provided herein. The MOFs include a M.sub.6(μ.sub.3-OH).sub.8(OH).sub.8(μ.sup.2,η.sup.2-(O.sub.2C).sub.2cyclam).sub.8 cluster, and a metal atom coordinated to the one or more cyclam of the cluster, wherein M is Zr or Hf, and the metal atom is any one of Cu, Ni, Cr, Ru, Co, and Gd. The MOFs can be used as an adsorbent, alone or in a medium with other components, of CO.sub.2. The MOFs can also be used as a catalyst for the transformation of CO.sub.2 and epoxides to cyclic carbonates. The MOFs can also be used in the electrochemical catalytic reduction of CO.sub.2. The MOFs can also be used for photocatalytic CO.sub.2 reduction for the production of carbon-based fossil fuels. The MOFs can also be used for light-induced nitric oxide (NO) release. The MOFs can also be used as magnetic resonance imaging (MRI) agents.