Ryan A. Hackler
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View article: Catalytic upcycling of polymers
Catalytic upcycling of polymers Open
A method of upcycling polymers to useful hydrocarbon materials. A catalyst with nanoparticles on a substrate selectively docks and cleaves longer hydrocarbon chains over shorter hydrocarbon chains. The nanoparticles exhibit an edge to face…
View article: Catalytic upcycling of polyolefins into lubricants
Catalytic upcycling of polyolefins into lubricants Open
A method of upcycling polymers to useful hydrocarbon materials. A catalyst with nanoparticles on a substrate selectively docks and cleaves longer hydrocarbon chains over shorter hydrocarbon chains. The nanoparticles exhibit an edge to face…
View article: Ion Specificity Influences on the Structure of Zwitterionic Brushes
Ion Specificity Influences on the Structure of Zwitterionic Brushes Open
Zwitterionic brushes have a wide range of applications, including use as lubricating surfaces and antifouling membranes. In this study, densely end-tethered poly(cysteine methacrylate) (PCysMA) brushes were synthesized using surface-initia…
View article: Ultrasmall amorphous zirconia nanoparticles catalyse polyolefin hydrogenolysis
Ultrasmall amorphous zirconia nanoparticles catalyse polyolefin hydrogenolysis Open
Carbon–carbon bond cleavage reactions, adapted to deconstruct aliphatic hydrocarbon polymers and recover the intrinsic energy and carbon value in plastic waste, have typically been catalysed by metal nanoparticles or air-sensitive organome…
View article: Zirconium-Catalyzed C–H Alumination of Polyolefins, Paraffins, and Methane
Zirconium-Catalyzed C–H Alumination of Polyolefins, Paraffins, and Methane Open
C-H/Et-Al exchange in zirconium-catalyzed reactions of saturated hydrocarbons and AlEt3 affords versatile organoaluminum compounds and ethane. The grafting of commercially available Zr(OtBu)4 on silica/alumina gives monopodal ≡SiO-Zr(OtBu)…
View article: Synthesis of platinum nanoparticles on strontium titanate nanocuboids<i>via</i>surface organometallic grafting for the catalytic hydrogenolysis of plastic waste
Synthesis of platinum nanoparticles on strontium titanate nanocuboids<i>via</i>surface organometallic grafting for the catalytic hydrogenolysis of plastic waste Open
Pt/SrTiO 3 nanoparticle catalysts have been synthesized by surface organometallic chemistry in solution on a 5 g scale. Pt/SrTiO 3 selectively and repeatedly upcycles isotactic polypropylene into uniform liquid products with M n ∼ 200 Da.
View article: Effect of Macro- and Microstructures on Catalytic Hydrogenolysis of Polyolefins
Effect of Macro- and Microstructures on Catalytic Hydrogenolysis of Polyolefins Open
Here, polyethylenes of varying molecular weight and branch density, as well as polypropylenes of varying molecular weight and tacticity, were catalytically converted to lower-molecular-weight liquid products to showcase how these various p…
View article: Size-Controlled Nanoparticles Embedded in a Mesoporous Architecture Leading to Efficient and Selective Hydrogenolysis of Polyolefins
Size-Controlled Nanoparticles Embedded in a Mesoporous Architecture Leading to Efficient and Selective Hydrogenolysis of Polyolefins Open
A catalytic architecture, comprising a mesoporous silica shell surrounding platinum nanoparticles (NPs) supported on a solid silica sphere (mSiO2/Pt-X/SiO2; X is the mean NP diameter), catalyzes hydrogenolysis of melt-phase polyethylene (P…
View article: CCDC 2115104: Experimental Crystal Structure Determination
CCDC 2115104: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Conversion of plastic waste into high-value lubricants: techno-economic analysis and life cycle assessment
Conversion of plastic waste into high-value lubricants: techno-economic analysis and life cycle assessment Open
The conversion of plastic waste into high-quality lubricants is more profitable than sorting the waste or converting it into liquid fuels. A life cycle assessment showed that the emissions were lower than those of petroleum lubricants of s…
View article: Ethylene polymerization with a crystallographically well-defined metal–organic framework supported catalyst
Ethylene polymerization with a crystallographically well-defined metal–organic framework supported catalyst Open
Crystallographic characterization of a heterogeneous ethylene polymerization catalyst elucidates a chromium–carbon bond after alkyl aluminum activation and provides mechanistic insights.
View article: Scalable Synthesis of Pt/SrTiO<sub>3</sub> Hydrogenolysis Catalysts in Pursuit of Manufacturing-Relevant Waste Plastic Solutions
Scalable Synthesis of Pt/SrTiO<sub>3</sub> Hydrogenolysis Catalysts in Pursuit of Manufacturing-Relevant Waste Plastic Solutions Open
An improved hydrothermal synthesis of shape-controlled, size-controlled 60 nm SrTiO3 nanocuboid (STO NC) supports, which facilitates the scalable creation of platinum nanoparticle catalysts supported on STO (Pt/STO) for the chemical conver…
View article: Submonolayer Is Enough: Switching Reaction Channels on Pt/SiO<sub>2</sub> by Atomic Layer Deposition
Submonolayer Is Enough: Switching Reaction Channels on Pt/SiO<sub>2</sub> by Atomic Layer Deposition Open
The reaction mechanism of CO2 with H2 is studied on platinum nanoparticles supported on fumed silica. It is found that platinum nanoparticle size, reaction temperature, and metal oxide promoters play important roles in determining the reac…
View article: Synthetic Lubricants Derived from Plastic Waste and their Tribological Performance
Synthetic Lubricants Derived from Plastic Waste and their Tribological Performance Open
The energy efficiency, mechanical durability, and environmental compatibility of all moving machine components rely heavily on advanced lubricants for smooth and safe operation. Herein an alternative family of high‐quality liquid (HQL) lub…
View article: Catalytic carbon-carbon bond cleavage and carbon-element bond formation give new life for polyolefins as biodegradable surfactants
Catalytic carbon-carbon bond cleavage and carbon-element bond formation give new life for polyolefins as biodegradable surfactants Open
Catalytic methods that introduce functional groups via carbon-carbon bond cleavage steps have typically been limited to moieties activated by strain or by directing groups, with few transformations engaging the bonds of only sp(3)-hybridiz…
View article: Isomerization and Selective Hydrogenation of Propyne: Screening of Metal–Organic Frameworks Modified by Atomic Layer Deposition
Isomerization and Selective Hydrogenation of Propyne: Screening of Metal–Organic Frameworks Modified by Atomic Layer Deposition Open
Various metal oxide clusters upward of 8 atoms (Cu, Cd, Co, Fe, Ga, Mn, Mo, Ni, Sn, W, Zn, In, and Al) were incorporated into the pores of the metal-organic framework (MOF) NU-1000 via atomic layer deposition (ALD) and tested via high-thro…
View article: Upcycling Single-Use Polyethylene into High-Quality Liquid Products
Upcycling Single-Use Polyethylene into High-Quality Liquid Products Open
Our civilization relies on synthetic polymers for all aspects of modern life; yet, inefficient recycling and extremely slow environmental degradation of plastics are causing increasing concern about their widespread use. After a single use…
View article: Atomically Precise Strategy to a PtZn Alloy Nanocluster Catalyst for the Deep Dehydrogenation of <i>n</i>-Butane to 1,3-Butadiene
Atomically Precise Strategy to a PtZn Alloy Nanocluster Catalyst for the Deep Dehydrogenation of <i>n</i>-Butane to 1,3-Butadiene Open
Here, the development of on-purpose 1,3-butadiene (BDE) technologies remains an active area in catalysis research, because of the importance of BDE in industrial polymer production. Here, we report on a nonoxidative dehydrogenation catalys…
View article: Expanding applications of SERS through versatile nanomaterials engineering
Expanding applications of SERS through versatile nanomaterials engineering Open
Nanomaterials engineering and synthetic chemistry continues to expand the range of applications for surface-enhanced Raman scattering spectroscopy.