Search Results - "Delgass, W. Nicholas"

Catalysis in a Cage: Condition-Dependent Speciation and Dynamics of Exchanged Cu Cations in SSZ-13 Zeolites by Paolucci, Christopher, Parekh, Atish A, Khurana, Ishant, Di Iorio, John R, Li, Hui, Albarracin Caballero, Jonatan D, Shih, Arthur J, Anggara, Trunojoyo, Delgass, W. Nicholas, Miller, Jeffrey T, Ribeiro, Fabio H, Gounder, Rajamani, Schneider, William F

“…The relationships among the macroscopic compositional parameters of a Cu-exchanged SSZ-13 zeolite catalyst, the types and numbers of Cu active sites, and…”
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Two-dimensional transition metal carbides as supports for tuning the chemistry of catalytic nanoparticles by Li, Zhe, Yu, Liang, Milligan, Cory, Ma, Tao, Zhou, Lin, Cui, Yanran, Qi, Zhiyuan, Libretto, Nicole, Xu, Biao, Luo, Junwei, Shi, Enzheng, Wu, Zhenwei, Xin, Hongliang, Delgass, W. Nicholas, Miller, Jeffrey T., Wu, Yue

“…Supported nanoparticles are broadly employed in industrial catalytic processes, where the active sites can be tuned by metal-support interactions (MSIs)…”
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Changes in Catalytic and Adsorptive Properties of 2 nm Pt3Mn Nanoparticles by Subsurface Atoms by Wu, Zhenwei, Bukowski, Brandon C, Li, Zhe, Milligan, Cory, Zhou, Lin, Ma, Tao, Wu, Yue, Ren, Yang, Ribeiro, Fabio H, Delgass, W. Nicholas, Greeley, Jeffrey, Zhang, Guanghui, Miller, Jeffrey T

“…Supported multimetallic nanoparticles (NPs) are widely used in industrial catalytic processes, where the relation between surface structure and function is…”
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Propane Aromatization over HZSM-5 and Ga/HZSM-5 Catalysts by Bhan, Aditya, Nicholas Delgass, W.

“…The selective transformation of light alkanes to aromatics that are more valuable and versatile feedstocks for the chemical industry is one of the major…”
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Isolation of the Copper Redox Steps in the Standard Selective Catalytic Reduction on Cu-SSZ-13 by Paolucci, Christopher, Verma, Anuj A., Bates, Shane A., Kispersky, Vincent F., Miller, Jeffrey T., Gounder, Rajamani, Delgass, W. Nicholas, Ribeiro, Fabio H., Schneider, William F.

“…Operando X‐ray absorption experiments and density functional theory (DFT) calculations are reported that elucidate the role of copper redox chemistry in the…”
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Size and Support Effects for the Water–Gas Shift Catalysis over Gold Nanoparticles Supported on Model Al2O3 and TiO2 by Shekhar, Mayank, Wang, Jun, Lee, Wen-Sheng, Williams, W. Damion, Kim, Seung Min, Stach, Eric A, Miller, Jeffrey T, Delgass, W. Nicholas, Ribeiro, Fabio H

“…The water–gas shift (WGS) reaction rate per total mole of Au under 7% CO, 8.5% CO2, 22% H2O, and 37% H2 at 1 atm for Au/Al2O3 catalysts at 180 °C and Au/TiO2…”
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DFT comparison of intrinsic WGS kinetics over Pd and Pt by Clay, John P., Greeley, Jeffrey P., Ribeiro, Fabio H., Nicholas Delgass, W., Schneider, William F.

“…[Display omitted] •Report consistent DFT calculations of WGS steps on Pd(111) and Pt(111).•Kinetics described using analytical model with variable CO binding…”
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Gas-phase epoxidation of propylene in the presence of H2 and O2 over small gold ensembles in uncalcined TS-1 by Lee, Wen-Sheng, Cem Akatay, M., Stach, Eric A., Ribeiro, Fabio H., Nicholas Delgass, W.

“…[Display omitted] •Uncalcined titanium silicalite-1 (U-TS-1) was used to support gold nanoparticles.•A slow increase in PO rate and PO/H2 selectivity during…”
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Catalysis at Metal/Oxide Interfaces: Density Functional Theory and Microkinetic Modeling of Water Gas Shift at Pt/MgO Boundaries by Ghanekar, Pushkar, Kubal, Joseph, Cui, Yanran, Mitchell, Garrett, Delgass, W. Nicholas, Ribeiro, Fabio, Greeley, Jeffrey

“…The impact of metal/oxide interfaces on the catalytic properties of oxide-supported metal nanoparticles is a topic of longstanding interest in the field of…”
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Probing the gold active sites in Au/TS-1 for gas-phase epoxidation of propylene in the presence of hydrogen and oxygen by Lee, Wen-Sheng, Lai, Li-Chung, Cem Akatay, M., Stach, Eric A., Ribeiro, Fabio H., Delgass, W. Nicholas

“…Au/S-1/TS-1 had at least 20 times higher PO rate at 200°C (per gram of catalyst), compared to that of a Au/S-1 sample with similar gold loading at ∼0.05wt%…”
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Metallic Pt as active sites for the water–gas shift reaction on alkali-promoted supported catalysts by Pazmiño, Jorge H., Shekhar, Mayank, Damion Williams, W., Cem Akatay, M., Miller, Jeffrey T., Nicholas Delgass, W., Ribeiro, Fabio H.

“…The enhancement of the WGS rate by alkali components (Li, Na, and K) was confirmed on Pt/Al2O3. Addition of sodium resulted in the highest promotion. Upon…”
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Reproducible preparation of Au/TS-1 with high reaction rate for gas phase epoxidation of propylene by Lee, Wen-Sheng, Cem Akatay, M., Stach, Eric A., Ribeiro, Fabio H., Nicholas Delgass, W.

“…The Au/TS-1 catalysts prepared at optimal DP conditions (pH of the gold slurry solution, the mixing time, and the preparation temperature) showed a PO rate…”
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Metallic Corner Atoms in Gold Clusters Supported on Rutile Are the Dominant Active Site during Water−Gas Shift Catalysis by Williams, W. Damion, Shekhar, Mayank, Lee, Wen-Sheng, Kispersky, Vincent, Delgass, W. Nicholas, Ribeiro, Fabio H, Kim, Seung Min, Stach, Eric A, Miller, Jeffrey T, Allard, Lawrence F

“…Au/TiO2 catalysts used in the water−gas shift (WGS) reaction at 120 °C, 7% CO, 22% H2O, 9% CO2, and 37% H2 had rates up to 0.1 moles of CO converted per mole…”
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Sustainable fuel for the transportation sector by Agrawal, Rakesh, Singh, Navneet R, Ribeiro, Fabio H, Delgass, W. Nicholas

“…A hybrid hydrogen-carbon (H₂CAR) process for the production of liquid hydrocarbon fuels is proposed wherein biomass is the carbon source and hydrogen is…”
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Identity and chemical function of gallium species inferred from microkinetic modeling studies of propane aromatization over Ga/HZSM-5 catalysts by Krishnamurthy, Gowri, Bhan, Aditya, Delgass, W. Nicholas

“…Unified gallium monohydride–gallium dihydride model predictions, indicating the regions where each active site dominates. All aluminum assumed to be in pairs,…”
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The Nature of the Isolated Gallium Active Center for Propane Dehydrogenation on Ga/SiO2 by Cybulskis, Viktor J., Pradhan, Shankali U., Lovón-Quintana, Juan J., Hock, Adam S., Hu, Bo, Zhang, Guanghui, Delgass, W. Nicholas, Ribeiro, Fabio H., Miller, Jeffrey T.

“…Single-site Ga/SiO 2 catalysts exhibit up to 99% C 3 H 6 selectivity at 4% propane conversion with an initial rate of 5.4 × 10 −4 (mole C 3 H 6 ) (mole Ga) −1…”
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Structural and catalytic differences in the effect of Co and Mo as promoters for Pt-based aqueous phase reforming catalysts by Dietrich, Paul J., Sollberger, Fred G., Akatay, M. Cem, Stach, Eric A., Delgass, W. Nicholas, Miller, Jeffrey T., Ribeiro, Fabio H.

“…Addition of Co and Mo to a Pt aqueous phase reforming (APR) catalyst increased the site time yields of the reaction, but showed differences in hydrogen…”
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Counting Au catalytic sites for the water–gas shift reaction by Shekhar, Mayank, Wang, Jun, Lee, Wen-Sheng, Cem Akatay, M., Stach, Eric A., Nicholas Delgass, W., Ribeiro, Fabio H.

“…Addition of bromine corresponding to 16% of the Au surface atoms decreases the water–gas shift (WGS) rate of a 2.3wt.%Au/TiO2 catalyst by six times and does…”
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Evidence of Defect-Promoted Reactivity for Epoxidation of Propylene in Titanosilicate (TS-1) Catalysts:  A DFT Study by Wells, David H, Delgass, W. Nicholas, Thomson, Kendall T

“…Our density functional theory study of hydroperoxy (OOH) intermediates on various model titanosilicalite (TS-1) Ti centers explores how microstructural aspects…”
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Kinetic studies of the stability of Pt for NO oxidation: Effect of sulfur and long-term aging by Pazmiño, Jorge H., Miller, Jeffrey T., Mulla, Shadab S., Nicholas Delgass, W., Ribeiro, Fabio H.

“…Two pathways are suggested during NO oxidation: (A) sulfur migration to interfacial support sites driven by the oxidation of surface Pt and (B) formation of…”
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