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Статті в журналах з теми "Catalysis, Ageing, STM"
Soto Beobide, Amaia, Anastasia M. Moschovi, Georgios N. Mathioudakis, Marios Kourtelesis, Zoi G. Lada, Konstantinos S. Andrikopoulos, Labrini Sygellou, Vassilios Dracopoulos, Iakovos Yakoumis, and George A. Voyiatzis. "High Catalytic Efficiency of a Nanosized Copper-Based Catalyst for Automotives: A Physicochemical Characterization." Molecules 27, no. 21 (October 31, 2022): 7402. http://dx.doi.org/10.3390/molecules27217402.
Повний текст джерелаGiuliano, Mattia, Maria Carmen Valsania, Pierfrancesco Ticali, Enrico Sartoretti, Sara Morandi, Samir Bensaid, Gabriele Ricchiardi, and Mauro Sgroi. "Characterization of the Evolution of Noble Metal Particles in a Commercial Three-Way Catalyst: Correlation between Real and Simulated Ageing." Catalysts 11, no. 2 (February 12, 2021): 247. http://dx.doi.org/10.3390/catal11020247.
Повний текст джерелаNeha, Neha, Ram Prasad, and Satya Vir Singh. "Simultaneous Catalytic Oxidation of a Lean Mixture of CO-CH4 over Spinel Type Cobalt Based Oxides." Bulletin of Chemical Reaction Engineering & Catalysis 15, no. 2 (June 12, 2020): 490–500. http://dx.doi.org/10.9767/bcrec.15.2.6499.490-500.
Повний текст джерелаNavarro-Espinoza, Sofía, Diana Meza-Figueroa, Roberto Guzmán, Alberto Duarte-Moller, Hilda Esparza-Ponce, Francisco Paz-Moreno, Belem González-Grijalva, et al. "Release of Nanoparticles in the Environment and Catalytic Converters Ageing." Nanomaterials 11, no. 12 (December 16, 2021): 3406. http://dx.doi.org/10.3390/nano11123406.
Повний текст джерелаManaila, Elena, Maria Stelescu, and Gabriela Craciun. "Degradation Studies Realized on Natural Rubber and Plasticized Potato Starch Based Eco-Composites Obtained by Peroxide Cross-Linking." International Journal of Molecular Sciences 19, no. 10 (September 20, 2018): 2862. http://dx.doi.org/10.3390/ijms19102862.
Повний текст джерелаHsu, Hsiu-Ling, and Rima D. Alharthy. "Enhanced Room-Temperature Catalytic Decomposition of Cumene Hydroperoxide into Phenol and Acetone." Science of Advanced Materials 13, no. 7 (July 1, 2021): 1246–52. http://dx.doi.org/10.1166/sam.2021.4001.
Повний текст джерелаArroyo-Lamas, Nagore, Iciar Arteagoitia, and Unai Ugalde. "Surface Activation of Titanium Dental Implants by Using UVC-LED Irradiation." International Journal of Molecular Sciences 22, no. 5 (March 5, 2021): 2597. http://dx.doi.org/10.3390/ijms22052597.
Повний текст джерелаДисертації з теми "Catalysis, Ageing, STM"
Blasetti, Cecilia. "Extensive oxidation treatments: ageing effects on a catalytic model system studied in UHV by STM." Doctoral thesis, Università degli studi di Trieste, 2009. http://hdl.handle.net/10077/3096.
Повний текст джерелаThis thesis concerns a surface science approach for the investigation of the ageing process of a model catalyst. It combines extreme oxidation conditions with Ultra High Vacuum (UHV) compatible characterization techniques. Our model system was the surface oxide formed on Rh(110); to grow such oxide, we used three alternative oxygen sources, optimizing for each case the preparation recipe. When dosing molecular oxygen, pressures in the ∼ 10− 4 mbar range were used, therefore bridging, to some extent, the pressure gap. For characterization of the oxides we used mainly Scanning Tunneling Microscopy (STM) and Thermal Desorption Spectroscopy (TDS), providing atomic scale and desorption mechanism information, respectively. Low Energy Electron Microscopy (LEEM) and X-ray Photoelectron Specroscopy (XPS) complemented our measurements with large scale morphology and reactivity data and with chemically resolved results. To mimic real catalytic conditions, we setup an ageing protocol consisting of cycles of oxidation and annealing in UHV (up to more than ∼ 40), with each of the three oxygen sources. In this way, we were able to observe two different kinds of ageing: a “contaminant-driven” and an “intrinsic” one, caused by the iterative oxidation procedure. The latter is connected to the presence of a new species we detected on the (1 × 1) surface obtained after the oxide desorption, that we named “units” (or ageing fingerprints). By decreasing their number we were able to show that the intrinsic ageing is, at least partially, reversible. We could not uniquely determine the structure of the “units”, but plausible models are proposed. ------------------------------------------------
Questa tesi si occupa dello studio dell’invecchiamento artificiale di un catalizzatore modello, combinando condizioni di ossidazione estreme con le tecniche di caratterizzazione, compatibili con l’ultra-alto-vuoto (UHV), proprie della scienza delle superfici. Il nostro sistema modello era l’ossido superficiale formato sul Rh(110); per crescere questo ossido, abbiamo utilizzato tre sorgenti alternative di ossigeno, ed abbiamo ottimizzato la ricetta di preparazione nei singoli casi. Utilizzando l’ossigeno molecolare abbiamo dosato a pressioni dell’ordine di ca. 10− 4 mbar, ed in questo modo abbiamo in parte colmato la “pressure gap” che solitamente divide gli studi su sistemi modello da quelli di catalisi reale. Per caratterizzare gli ossidi abbiamo usato principalmente la microscopia a scansione ad effetto tunnel STM e la spettroscopia di desorbimento termico TDS, che ci hanno fornito rispettivamente informazioni su scala atomica e sul meccanismo di desorbimento. Le tecniche LEEM e XPS hanno contribuito in modo complementare alle nostre misure con dati di morfologia e reattività su larga scala, da un lato, e con dati risolti chimicamente, dall’altro. Per simulare le condizioni della catalisi reale, abbiamo sviluppato un protocollo di invecchiamento (“ageing”) composto da cicli di ossidazione e riscaldamento in ultra-alto-vuoto (fino a ca. 40), con ognuna delle tre sorgenti di ossigeno. Seguendo questa procedura, abbiamo osservato due diversi tipi di invecchiamento dell’ossido di rodio: un primo tipo dominato dalla presenza di contaminanti, ed un secondo invece che abbiamo chiamato “intrinseco”, causato cioè dalle ripetute ossidazioni. Quest’ultimo dipende dalla presenza di una nuova specie osservata sulla superficie (1 × 1) che si ottiene a seguito del desorbimento di ciascun ossido, che abbiamo chiamato “units” (o -ageing fingerprint-). Ri- ducendo la densità di questa specie siamo stati in grado di mostrare come l’invecchiamento intrinseco sia, almeno in parte, reversibile. Non abbiamo potuto determinare univocamente la struttura delle “units”, ma alcuni modelli possibili vengono proposti.
XXI Ciclo
1981
Частини книг з теми "Catalysis, Ageing, STM"
Antonio-Cruz, Rocío, Nora Alicia Purata-Pérez, María Berzabé Vázquez-González, and Radamés Trejo-Valencia. "Remediation of soils contaminated by hydrocarbons using a polymeric material (carboxymethylcellulose gel)." In CIERMMI Women in Science Engineering and Technology TXV, 99–111. ECORFAN, 2021. http://dx.doi.org/10.35429/h.2021.6.99.111.
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