Výsledky vyhledávání - "Junnan Shangguan"

Determining the hydration energetics on carbon-supported Ru catalysts: An adsorption calorimetry and density functional theory study

Autor: Megan R. Hawkins, Cody B. Cockreham, Su Ha, Jean-Sabin McEwen, Neeru Chaudhary, Di Wu, Chen Yang, Junnan Shangguan, Xianghui Zhang, Ya-Huei Chin, Alyssa J. R. Hensley

Publikováno v: Catalysis Today. 365:172-180

Fundamental knowledge on the energetics at the interface between a water layer and a metal catalyst is essential so as to understand the roles that water can play in the synthesis, activation, and regeneration of noble metal-based catalysts. Here, we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1a43f27cdea46aa8baf6d22a228812b9
https://doi.org/10.1016/j.cattod.2020.09.021

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Catalytic consequences of hydrogen addition events and solvent-adsorbate interactions during guaiacol-H2 reactions at the H2O-Ru(0 0 0 1) interface

Autor: Jacob Bray, Alyssa J. R. Hensley, Jean-Sabin McEwen, Junnan Shangguan, Ya-Huei Chin

Publikováno v: Journal of Catalysis. 395:467-482

Catalytic reactions of biomass-derived phenolics and H2 occur on transition metal surfaces via competitive C–O cleavage and ring saturation pathways, with both requiring multiple hydrogen addition events before forming their respective rate limitin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::981e119584e8081b71b949f0dfe89c69
https://doi.org/10.1016/j.jcat.2020.09.034

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The Role of Protons and Hydrides in the Catalytic Hydrogenolysis of Guaiacol at the Ruthenium Nanoparticle–Water Interface

Autor: Jean-Sabin McEwen, Ya-Huei Cathy Chin, Matthew V. Gradiski, Junnan Shangguan, Niklas Pfriem, Robert H. Morris, Alyssa J. R. Hensley

Publikováno v: ACS Catalysis. 10:12310-12332

The mechanistic roles of free hydronium ions, surface hydrides, and interfacial protons during guaiacol hydrodeoxygenation (HDO) on ruthenium nanoparticles have been established. As guaiacol adsorb...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e04ca97f28454e0c0410311514a472b0
https://doi.org/10.1021/acscatal.0c01963

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Mechanistic details of C O bond activation in and H-addition to guaiacol at water-Ru cluster interfaces

Autor: Junnan Shangguan, Niklas Pfriem, Ya-Huei Chin

Publikováno v: Journal of Catalysis. 370:186-199

Catalytic pathways of guaiacol and hydrogen (H2) reactions on dispersed Ru clusters in the aqueous medium and the associated kinetic requirements for C OCH3 bond cleavage and H-addition steps are established based on kinetic and isotopic investigatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ef515fb361cfc20855737157f0ea70b
https://doi.org/10.1016/j.jcat.2018.11.036

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Kinetic Significance of Proton–Electron Transfer during Condensed Phase Reduction of Carbonyls on Transition Metal Clusters

Autor: Junnan Shangguan, Ya-Huei Cathy Chin

Publikováno v: ACS Catalysis. 9:1763-1778

Kinetic measurements, competitive hydrogenation, and H–D kinetic isotopic studies confirm the prevalence of proton–electron transfer events during the catalytic reduction of aliphatic carbonyls (C3–C6) at protic solvent and transition-metal (Ru

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::98d404fe4fd98e8bc724738e13d2f87c
https://doi.org/10.1021/acscatal.8b03470

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Mechanistic insights on C O and C C bond activation and hydrogen insertion during acetic acid hydrogenation catalyzed by ruthenium clusters in aqueous medium

Autor: Ya-Huei Chin, Junnan Shangguan, Mariefel V. Olarte

Publikováno v: Journal of Catalysis. 340:107-121

Catalytic pathways for acetic acid (CH 3 COOH) and hydrogen (H 2 ) reactions on dispersed Ru clusters in the aqueous medium and the associated kinetic requirements for C O and C C bond cleavages and hydrogen insertions are established from rate and i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::592d49ecc31afdad20917a043cd13aff
https://doi.org/10.1016/j.jcat.2016.04.024

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Controllable synthesis of hollow mesoporous silica spheres and application as support of nano-gold

Autor: Weihua Ma, Junnan Shangguan, Wei Jiang, Qin Zhong, Tao Wang

Publikováno v: Journal of Solid State Chemistry. 215:67-73

Hollow silica spheres with mesoporous structure were synthesized by sol–gel/emulsion method. In the process, the surfactant, cetyltrimethylammonium bromide (CTAB) was used to stabilize the oil droplet and also used as structure direct agent. The di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::747f826cb67164108603ca90766a8c1d
https://doi.org/10.1016/j.jssc.2014.03.003

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Foaming behavior of microcellular foam polypropylene/modified nano calcium carbonate composites

Autor: Junnan Shangguan, Jie Ding, Weihua Ma, Qin Zhong

Publikováno v: Journal of Applied Polymer Science. 128:3639-3651

A new process was used to prepare microcellular foams with supercritical carbon dioxide as the physical foaming agent in a batch. The foaming temperature range of the new process was about five times broader than that of the conventional one. Charact

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9841380fe6a8a202c4c04ccf08c8918c
https://doi.org/10.1002/app.38416

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