Results 111 to 120 of about 563,418 (353)

Selective Hydrodemethylation of Methylalkylbenzenes on Potassium Hydride

Angewandte Chemie, EarlyView.
Selective catalytic hydrodealkylation of methylalkylbenzenes on carbon‐supported potassium hydride is reported. The reaction exhibits a reactivity trend of 1° ∼ 2° ∼ 3° < CH3, which is opposite to traditional dealkylation and hydrodealkylation. DFT calculations on the (001) facet of KH with ortho‐ethyltoluene suggest that selectivity is controlled by ...
Puyang Tian, Marc Figueras‐Valls, Fei Chang, Francesc Viñes, Francesc Illas, Alexey Fedorov   +5 more
wiley   +2 more sources

Hobbes, Thomas (2022). Sobre l’home. Elements de filosofia: secció segona

Enrahonar: Quaderns de Filosofia
Hobbes, Thomas (2022) Sobre l’home. Elements de filosofia: secció segona Traducció i estudi introductori de Josep Monserrat Molas Barcelona: Edicions de la Universitat de Barcelona, 168 p.
Constantí Cabestany
doaj   +1 more source

Pautes i indicacions bàsiques per a l'ús d'obres alienes en obres pròpies, respectant les lleis de propietat intel·lectual. Concrecions per al Treball Final de Grau de la Facultat de Farmàcia [PDF]

, 2014
Material elaborat pel CRAI Biblioteca de Farmàcia amb l'assessorament de la Unitat de Recerca del CRAI de la UB.Document amb definicions, indicacions i exemples per a un ús correcte de les obres alienes en obres pròpies.
Universitat de Barcelona. CRAI
core  

Tandem Takeoff: Powering Tomorrow with Industrial‐Grade Perovskite/Silicon Solar Cells

Advanced Energy Materials, EarlyView.
Perovskite/silicon tandem solar cells have recently achieved certified power conversion efficiencies of 34.85%, far exceeding the Shockley‐Queisser limit for single‐junction silicon and standalone perovskite cells. This review highlights the latest advances in the design, integration, and optimization of perovskite top cells for monolithic tandem ...
Maria Vasilopoulou, Di Huang, Jue Gong, Faming Li, Hao Zhang, Yinqing Sun, Lin Mao, Ermioni Polydorou, Ioannis G. Aviziotis, Leonidas C. Palilis, Onurcan Kaya, Stephan Roche, Jordi Arbiol, Dimitrios Davazoglou, Emmanuel Kymakis, Lei Liu, Kuan Sun, Abd Rashid bin Mohd Yusoff, Mingzhen Liu, Mohammad Khaja Nazeeruddin   +19 more
wiley   +1 more source

Dynamic Confinement Approach for High Metal Loading Single‐Atom Catalysts Based on Covalent Organic Frameworks

Angewandte Chemie, EarlyView.
We introduced a new synthetic strategy for the preparation of high metal loading crystalline single‐atom catalysts based on covalent organic frameworks with atomically distributed Pd ions and metal contents of up to 22.2 wt%. Theoretical simulations reveal that the crystalline framework dynamically confines Pd atoms between different binding sites ...
Kyung Seob Song, Murad Najafov, José Manuel González Acosta, Andrea Ruiz Ferrando, Stephan Pollitt, Patrick W. Fritz, Timur Ashirov, Krzysztof Piech, Felipe Gándara, Maarten Nachtegaal, Núria López, Ali Coskun   +11 more
wiley   +2 more sources

La difusión de la investigación: una experiencia de acercamiento entre la universidad y la secundaria [PDF]

, 2012
En este trabajo se presenta la experiencia de la Feria del Conocimiento (dos ediciones), organizada por Barcelona Knowledge Campus (BKC: Universitat de Barcelona y Universitat Politècnica de Catalunya).
Font Soldevila, Josep, Grau Vilalta, Maria Dolors, Torras Melenchon, Nuria   +2 more
core  

Beyond Imperfect Match: Silicon/Graphite Hybrid Anodes for High‐Energy–Density Lithium‐Ion Batteries

Advanced Energy Materials, EarlyView.
Silicon/graphite (Si/Gr) hybrid anodes are limited by Si's large volume change and mismatch with Gr. This review offers mechanistic insights into imperfectly matched Si/Gr hybrid anodes, elucidating heterogeneous lithiation behavior and interfacial failure pathways, and thereby informing the design of durable, high‐energy–density lithium‐ion batteries.
Jing Li, Karol Viviana Mejía‐Centeno, Malik Dilshad Khan, Guifang Zeng, Lijie Ci, Andreu Cabot, Qing Sun   +6 more
wiley   +1 more source

Molecular Electrocatalyst Enables Direct Electrochemical Capture and Conversion of CO2 up to Atmospheric Concentration

Angewandte Chemie, EarlyView.
A molecular manganese electrocatalyst enables the direct electrochemical capture and conversion of dilute CO2 (1% – 0.2%) to CO with nearly unit Faradaic efficiency, achieving high efficiency even at atmospheric concentrations (420 ppm). By bypassing energy‐intensive pre‐concentration steps, this integrated approach highlights a sustainable pathway for
Mattia Vettori, Federico Franco, Sergio Fernández, Guillem Pey, Vlad Martin Diaconescu, Josep M. Luis, Julio Lloret‐Fillol   +6 more
wiley   +2 more sources

Recuperar la història de la Segona República Espanyola [PDF]

, 2003
L'article recull un discurs de Josep Fontana pronunciat l'octubre de 2002 a la Universitat Autònoma de Barcelona on reflexiona entorn la necessitat de formular una nova lectura història de la Segona República espanyola, de la guerra civil i del ...
Fontana i Lázaro,Josep,
core  

Advancing European Plant Variety Registration: Data‐Driven Insights and Stakeholder Perspectives

Agribusiness, EarlyView.
ABSTRACT Efficient plant variety registration is crucial for fostering innovation in the European Union, yet the current regulatory framework is complex and faces calls for reform. This study provides data‐driven evidence to inform the ongoing legislative debate by employing a mixed‐methods approach.
Sergio Urioste Daza, Ibtissem Taghouti, José María Gil Roig   +2 more
wiley   +1 more source