Browsing by Subject "Catalitzadors"
Now showing items 1-20 of 106
-
12. Urban Catalyst
(2014-03-12)
Audiovisual
Open Access -
3D-Printed Co/YSZ catalyst for H2 production
(Universitat Politècnica de Catalunya, 2022-02-14)
Master thesis
Restricted access - author's decision3D printing is a constantly improving manufacturing technique. Due to its improvement, more and more possibilities are offered to us. Starting with impression of polymers, the multitude of possibilities is now vast, and ... -
A new class of vitrimers based on aliphatic poly(thiourethane) networks with shape memory and permanent shape reconfiguration
(Elsevier, 2019-01-05)
Article
Open AccessVitrimers are a new promising class of polymeric materials which are attracting increasing attention thanks to their thermosetting characteristics with their capability of being reprocessed and recyclable, which make them ... -
A prototype reactor for highly selective solar-driven CO2 reduction to synthesis gas using nanosized earth-abundant catalysts and silicon photovoltaics
(2017-10)
Article
Open AccessThe conversion of carbon dioxide (CO2) into value-added chemicals and fuels, preferably using renewable energy and earth-abundant materials, is considered a key priority for future energy research. In this work, a bias-free ... -
Activated carbon modification towards efficient catalyst for high value-added products synthesis from alpha-pinene
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-12-17)
Article
Open AccessDT0-activated carbons modified with HCl and HNO3 acids, which were used for the first time in the catalytic process of alpha-pinene isomerization, are presented in this study. The carbon materials DT0, DT0_HCl, DT0_HNO3, ... -
Ambient pressure photoemission spectroscopy reveals the mechanism of carbon soot oxidation in ceria-based catalysts
(2016-06-27)
Article
Open AccessRemoving soot is one of the most important challenges in minimizing the impact of combustion engines on the environment. Catalysts based on CeO2 have proved suitable to oxidize soot due to their capacity to store and release ... -
An efficient and reusable catalyst based on Pd/CeO2 for the room temperature aerobic Suzuki–Miyaura reaction in water/ethanol
(2010)
Article
Restricted access - publisher's policyThe Pd/CeO2 system behaves as an efficient precatalyst for the Suzuki–Miyaura cross-coupling under mild conditions (298 K, in air) in ethanol/water. A broad range of aryl bromides, including those deactivated, and ... -
Application of Fe-Zn-Mg-Al-O hydrotalcites supported Au as active nano-catalyst for fermentative hydrogen production
(2014-10-01)
Article
Restricted access - publisher's policyFour different Au/Fe-Zn-Mg-Al-O hydrotalcites (HTs) supported Au catalysts were synthesized by the incipient impregnation method and characterized by X-ray photoelectron spectroscopy and scanning electron microcopy. ... -
Atomically dispersed Fe in a C2N based catalyst as a sulfur host for efficient lithium–sulfur batteries
(2021-02-04)
Article
Open AccessLithium–sulfur batteries (LSBs) are considered to be one of the most promising next generation energy storage systems due to their high energy density and low material cost. However, there are still some challenges for the ... -
Bio-nanohybrid catalysts based on L-leucine immobilized in hydrotalcite and their activity in aldol reaction
(2016-06-05)
Article
Open AccessNanohybrid materials based on L-leucine (L-Leu) and hydrotalcites (HT) were prepared by the ion exchange and reconstruction method, under mild synthesis conditions. The location, amount and the form of the immobilized L-Leu ... -
Boosted CO2 reaction with methanol to yield dimethyl carbonate over Mg–Al hydrotalcite-silica lyogels
(2013-05-13)
Article
Restricted access - publisher's policyNonimmobilized and immobilized Mg–Al hydrotalcite-like materials on silica lyogels were prepared and activated by calcination to be tested as catalysts in the direct carboxylation reaction of methanol. The HTs supportedon ... -
Catalytic activity and characterization of Fe-Zn-Mg-Al hydrotalcites in biohydrogen production
(2013-08-21)
Article
Restricted access - publisher's policyFour different M2þeMgeAl hydrotalcite (HT) materials were investigated for their effect on biohydrogen enhancement, where M2þ is Fe and/or Zn. HTs were synthesized by the coprecipitation method and characterized by ... -
Catalytic ammonia decomposition for hydrogen production on Ni, Ru and Ni–Ru supported on CeO2
(2019-05-13)
Article
Open AccessCeria-supported Ni, Ru and NiRu catalysts have been tested in the catalytic decomposition of ammonia to yield hydrogen and their performance in long-term tests has been compared to alumina-supported Ni and Ru samples. The ... -
Catalytic methani steam reforming in a micro-structured reactor for hydrogen production
(Universitat Politècnica de Catalunya, 2018-06-12)
Bachelor thesis
Open AccessIn this project, a stainless ste el micro - structured reactor built by a company for the hydrogen production by methane steam reforming i s tested. A nickel based catalyst is prepared through the “incipient wetness ... -
Catalytic wet oxidation of black liquor
(Universitat Politècnica de Catalunya, 2012)
Master thesis (pre-Bologna period)
Open AccessThe major aspects of wet air oxidation and catalytic wet air oxidation have been reviewed in this work paying special attention to the reaction mechanisms, kinetics and the industrial process. In the experimental section ... -
Ceria-based catalysts studied by near ambient pressure x-ray photoelectron spectroscopy: A review
(2020-03-03)
Article
Open AccessThe development of better catalysts is a passionate topic at the forefront of modern science, where operando techniques are necessary to identify the nature of the active sites. The surface of a solid catalyst is dynamic ... -
Ceria-zirconia particles wrapped in a 2D carbon envelope: improved low-temperature oxygen transfer and oxidation activity
(2015-10-08)
Article
Open AccessEngineering the interface between different compo-nents of heterogeneous catalysts at nanometer level canradically alter their performances.This is particularly true forceria-based catalysts where the interactions are ... -
Chemoselective hydrogenation of cinnamaldehyde at atmospheric pressure over combustion synthesized Pd catalysts
(2017-10-01)
Article
Open AccessA series of Pd-supported metal oxides (Al2O3, Fe2O3 and CeO2) have been prepared by a single step solution combustion synthesis (SCS) method. Their catalytic performance was evaluated for the selective hydrogenation of ... -
CO oxidation and COPrOx over preformed Au nanoparticles supported over nanoshaped CeO2
(2016-02-10)
Article
Open AccessAu/CeO2 (0.25% wt. Au) catalysts were prepared by anchoring preformed Au nanoparticles over ceria polycrystals, cubes and rods and tested in the oxidation of CO and COPrOx. The use of preformed Au nanoparticles assured a ... -
CO preferential oxidation under H-2-rich streams on copper oxide supported on Fe promoted CeO2
(2015-10-05)
Article
Open AccessIn this work the effect of Fe addition to copper/ceria catalysts on the catalytic activity toward CO-PROX reaction has been studied and related to the modification of textural and redox properties induced by iron. Catalysts ...
