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Dive into the research topics where Nicholas C. Nelson is active.

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Featured researches published by Nicholas C. Nelson.


ACS Catalysis | 2015

Role Of CO2 As a Soft Oxidant For Dehydrogenation of Ethylbenzene to Styrene over a High-Surface-Area Ceria Catalyst

Li Zhang; Zili Wu; Nicholas C. Nelson; Aaron D. Sadow; Igor I. Slowing; Steven H. Overbury

Catalytic performance and the nature of surface adsorbates were investigated for high-surface-area ceria during the ethylbenzene oxidative dehydrogenation (ODH) reaction using CO2 as a soft oxidant. The high surface area ceria material was synthesized using a template-assisted method. The interactions among ethylbenzene, styrene, and CO2 on the surface of ceria and the role of CO2 for the ethylbenzene ODH reaction have been investigated in detail by using activity test, in situ diffuse reflectance infrared and Raman spectroscopy. CO2 as an oxidant not only favored the higher yield of styrene but also inhibited the deposition of coke during the ethylbenzene ODH reaction. Ethylbenzene ODH reaction over ceria followed a two-step pathway: ethylbenzene is first dehydrogenated to styrene with H2 formed simultaneously, and then CO2 reacts with H2 via the reverse water gas shift. The produced styrene can easily undergo polymerization to form polystyrene, which is a key intermediate for coke formation. In the abse...


Journal of Materials Chemistry | 2017

Phosphate modified ceria as a Brønsted acidic/redox multifunctional catalyst

Nicholas C. Nelson; Zhuoran Wang; Pranjali Naik; J. Sebastián Manzano; Marek Pruski; Igor I. Slowing

Deposition of trimethylphosphate onto ceria followed by thermal treatment resulted in the formation of surface phosphates with retention of the ceria fluorite structure. The structural and chemical properties of the phosphate-functionalized ceria were studied using 31P solid-state NMR, XPS, zeta titration, ammonia thermal desorption, pyridine adsorption, and model reactions. The introduction of phosphates generated Bronsted acid sites and decreased the number of Lewis acid sites on the surface. The relative amount of Lewis and Bronsted acids can be controlled by the amount of trimethylphosphate used in the synthesis. Upon deposition of Pd, the multifunctional material showed enhanced activity for the hydrogenolysis of eugenol and guaiacol compared to Pd on the unmodified ceria support. This was attributed to the cooperativity between the Lewis acid sites, which activate the substrate for dearomatization, and the redox/Bronsted acid properties, which catalyze hydrogenolysis.


Topics in Catalysis | 2014

Heterogeneous Multicatalytic System for Single-Pot Oxidation and C–C Coupling Reaction Sequences

Nicholas C. Nelson; Umesh Chaudhary; Kapil Kandel; Igor I. Slowing

A system comprising two catalysts supported on mesoporous silica nanoparticles (MSNs) was employed to perform a sequence of two reactions in a single pot. Palladium nanoparticles catalyzed the oxidation of furfuryl alcohol with molecular oxygen at atmospheric pressure. The oxidation product, furfural, was then reacted with acetone via an aldol condensation catalyzed by amines supported on MSNs. Each reaction was first tested individually to establish optimal conditions. Both catalysts were then introduced into the same reactor under the proven conditions, and the entire reaction sequence was performed giving the desired product with high selectivity. The overall yield of the reaction sequence was highly dependent on the relative concentrations of the reactants in the mixture.


Journal of Physical Chemistry Letters | 2012

Selective Alcohol Dehydrogenation and Hydrogenolysis with Semiconductor-Metal Photocatalysts: Toward Solar-to-Chemical Energy Conversion of Biomass-Relevant Substrates

T. Purnima A. Ruberu; Nicholas C. Nelson; Igor I. Slowing; Javier Vela


ACS Catalysis | 2015

Selective Hydrogenation of Phenol Catalyzed by Palladium on High-Surface-Area Ceria at Room Temperature and Ambient Pressure

Nicholas C. Nelson; Juan Sebastian Manzano; Aaron D. Sadow; Steven H. Overbury; Igor I. Slowing


ACS Catalysis | 2015

Mesoporous Silica-Supported Amidozirconium-Catalyzed Carbonyl Hydroboration

Naresh Eedugurala; Zhuoran Wang; Umesh Chaudhary; Nicholas C. Nelson; Kapil Kandel; Takeshi Kobayashi; Igor I. Slowing; Marek Pruski; Aaron D. Sadow


Journal of Physical Chemistry C | 2013

Templated Synthesis and Chemical Behavior of Nickel Nanoparticles within High Aspect Ratio Silica Capsules

Nicholas C. Nelson; T. Purnima; A. Ruberu; Malinda D. Reichert; Javier Vela


ACS Catalysis | 2015

Synergistic Interaction between Oxides of Copper and Iron for Production of Fatty Alcohols from Fatty Acids

Kapil Kandel; Umesh Chaudhary; Nicholas C. Nelson; Igor I. Slowing


Industrial & Engineering Chemistry Research | 2014

Vapor-Phase Oxidation of Benzyl Alcohol Using Manganese Oxide Octahedral Molecular Sieves (OMS-2)

Naftali Opembe; Curtis Guild; Cecil K. King’ondu; Nicholas C. Nelson; Igor I. Slowing; Steven L. Suib


Catalysis Letters | 2016

Aerobic Oxidation of Cyclic Amines to Lactams Catalyzed by Ceria-Supported Nanogold

Taiwo O. Dairo; Nicholas C. Nelson; Igor I. Slowing; Robert J. Angelici; L. Keith Woo

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Steven H. Overbury

Oak Ridge National Laboratory

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Curtis Guild

University of Connecticut

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