"uuid","repository link","title","author","contributor","publication year","abstract","subject topic","language","publication type","publisher","isbn","issn","patent","patent status","bibliographic note","access restriction","embargo date","faculty","department","research group","programme","project","coordinates"
"uuid:633ecf01-8d29-4756-9ef7-6f6f465daa9d","http://resolver.tudelft.nl/uuid:633ecf01-8d29-4756-9ef7-6f6f465daa9d","Unveiling the Structure Sensitivity for Direct Conversion of Syngas to C2-Oxygenates with a Multicomponent-Promoted Rh Catalyst","Sun, X. (TU Delft ChemE/Catalysis Engineering); Jansma, H. (TU Delft ChemE/O&O groep; TU Delft ChemE/Catalysis Engineering); Miyama, Toshihito (Sekisui Chemical Co., LTD., Tsukubashi); Sanjeewa Aluthge, Rasika Dasanayake (Sekisui Chemical Co., LTD., Tsukubashi); Shinmei, Kenichi (Sekisui Chemical Co., LTD., Tsukubashi); Yagihashi, Noritoshi (Sekisui Chemical Co., LTD., Tsukubashi); Nishiyama, Haruka (Sekisui Chemical Co., LTD., Tsukubashi); Osadchii, D. (TU Delft ChemE/Catalysis Engineering); van der Linden, B. (TU Delft ChemE/O&O groep; TU Delft ChemE/Catalysis Engineering); Makkee, M. (TU Delft ChemE/Catalysis Engineering)","","2019","Abstract: Mn and Li promoted Rh catalysts supported on SiO2 with a thin TiO2 layer were synthesized by stepwise incipient wetness impregnation approach. The thin TiO2 layer on the surface of SiO2 was proved to stabilize those small Rh nanoparticles and hinder their agglomeration. The reducibility of Rh on these catalysts depends on Rh particle size as well as the position of manganese oxide, and large Rh nanoparticles with MnO on Rh nanoparticles can be only reduced at an elevated temperature. Catalyst with large Rh particles exhibits a higher CO conversion and higher products selectivity towards long chain hydrocarbons and C2-oxygenates at the expense of decreasing methane formation than a similar catalyst with smaller Rh particles. This was attributed to the synergistic effect of Mn and Li promotion and molar ratio between Rh0 and Rhδ+ sites on the surface of Rh nanoparticles. Moreover, Rh nanoparticles on MnO are proved to be more efficient in promoting hydrogenation of acetaldehyde to ethanol than its counterpart with MnO on Rh nanoparticles. Finally, in order to target high C2-oxygenates selectivity, low reaction temperature together with a low H2/CO ratio in the feed is recommended. Graphic Abstract: [Figure not available: see fulltext.].","Acetaldehyde; Ethanol; Mn; Particle size; Rh","en","journal article","","","","","","","","","","","ChemE/Catalysis Engineering","","",""
"uuid:9e5de706-0275-46b3-b074-aa291b9247d7","http://resolver.tudelft.nl/uuid:9e5de706-0275-46b3-b074-aa291b9247d7","Structure-activity relationships in metal organic framework derived mesoporous nitrogen-doped carbon containing atomically dispersed iron sites for CO2 electrochemical reduction","Sun, X. (TU Delft ChemE/Catalysis Engineering); Wang, R. (TU Delft ChemE/Catalysis Engineering); Ould-Chikh, Samy (King Abdullah University of Science and Technology); Osadchii, D. (TU Delft ChemE/Catalysis Engineering); Li, G. (TU Delft ChemE/Inorganic Systems Engineering; TU Delft ChemE/Catalysis Engineering); Aguilar, Antonio (Université Grenoble Alpes); Hazemann, Jean louis (Université Grenoble Alpes); Kapteijn, F. (TU Delft ChemE/Catalysis Engineering); Gascon, Jorge (TU Delft ChemE/Catalysis Engineering; King Abdullah University of Science and Technology)","","2019","Mesoporous nitrogen-doped carbon nanoparticles with atomically dispersed iron sites (named mesoNC-Fe) are synthesized via high-temperature pyrolysis of an Fe containing ZIF-8 MOF. Hydrolysis of tetramethyl orthosilicate (TMOS) in the MOF framework prior to pyrolysis plays an essential role in maintaining a high surface area during the formation of the carbon structure, impeding the formation of iron (oxide) nanoparticles. To gain inside on the nature of the resulting atomically dispersed Fe moieties, HERFD-XANES, EXAFS and valence-to-core X-ray emission spectroscopies have been used. The experimental spectra (both XAS and XES) combined with theoretical calculations suggest that iron has a coordination sphere including a porphyrinic environment and OH/H2O moieties responsible for the high activity in CO2 electroreduction. DFT calculations demonstrate that CO formation is favored in these structures because the free energy barriers of *COOH formation are decreased and the adsorption of *H is impeded. The combination of such a unique coordination environment with a high surface area in the carbon structure of mesoNC-Fe makes more active sites accessible during catalysis and promotes CO2 electroreduction.","Atomically dispersed sites; CO; Electroreduction; Iron","en","journal article","","","","","","Accepted Author Manuscript","","2021-09-25","","","ChemE/Catalysis Engineering","","",""
"uuid:edbcde5f-0ec6-4683-9fcd-891500d198a8","http://resolver.tudelft.nl/uuid:edbcde5f-0ec6-4683-9fcd-891500d198a8","Metal-Organic-Framework-Mediated Nitrogen-Doped Carbon for CO2 Electrochemical Reduction","Wang, R. (TU Delft ChemE/Catalysis Engineering); Sun, X. (TU Delft ChemE/Catalysis Engineering); Ould-Chikh, Samy (King Abdullah University of Science and Technology); Osadchii, D. (TU Delft ChemE/Catalysis Engineering); Bai, F. (TU Delft ChemE/Catalysis Engineering; TU Delft Applied Sciences); Kapteijn, F. (TU Delft ChemE/Catalysis Engineering); Gascon, Jorge (TU Delft ChemE/Catalysis Engineering; King Abdullah University of Science and Technology)","","2018","A nitrogen-doped carbon was synthesized through the pyrolysis of the well-known metal-organic framework ZIF-8, followed by a subsequent acid treatment, and has been applied as a catalyst in the electrochemical reduction of carbon dioxide. The resulting electrode shows Faradaic efficiencies to carbon monoxide as high as ∼78%, with hydrogen being the only byproduct. The pyrolysis temperature determines the amount and the accessibility of N species in the carbon electrode, in which pyridinic-N and quaternary-N species play key roles in the selective formation of carbon monoxide.","CO electrochemical reduction; electrocatalyst; MOF-mediated synthesis; nitrogen-doped carbon; ZIF-8","en","journal article","","","","","","Accepted Author Manuscript","","2019-05-18","Applied Sciences","","ChemE/Catalysis Engineering","","",""
"uuid:b52cdb35-e35d-4a99-b93f-313e3e6048af","http://resolver.tudelft.nl/uuid:b52cdb35-e35d-4a99-b93f-313e3e6048af","Manufacture of highly loaded silica-supported cobalt Fischer-Tropsch catalysts from a metal organic framework","Sun, X. (TU Delft ChemE/Catalysis Engineering); Olivos Suarez, A.I. (TU Delft ChemE/Catalysis Engineering); Meijerink, Mark (Universiteit Utrecht); Van Deelen, Tom (Universiteit Utrecht); Ould-Chikh, Samy (King Abdullah University of Science and Technology); Zečević, Jovana (Universiteit Utrecht); de Jong, K.M. (TU Delft Information Management); Kapteijn, F. (TU Delft ChemE/Catalysis Engineering); Gascon, Jorge (TU Delft ChemE/Catalysis Engineering; King Abdullah University of Science and Technology)","","2017","The development of synthetic protocols for the preparation of highly loaded metal nanoparticle-supported catalysts has received a great deal of attention over the last few decades. Independently controlling metal loading, nanoparticle size, distribution, and accessibility has proven challenging because of the clear interdependence between these crucial performance parameters. Here we present a stepwise methodology that, making use of a cobalt-containing metal organic framework as hard template (ZIF-67), allows addressing this long-standing challenge. Condensation of silica in the Co-metal organic framework pore space followed by pyrolysis and subsequent calcination of these composites renders highly loaded cobalt nanocomposites (~ 50 wt.% Co), with cobalt oxide reducibility in the order of 80% and a good particle dispersion, that exhibit high activity, C5 + selectivity and stability in Fischer-Tropsch synthesis.","","en","journal article","","","","","","","","","","","ChemE/Catalysis Engineering","","",""
"uuid:37d758b5-bf35-4a34-83c9-235008eaf116","http://resolver.tudelft.nl/uuid:37d758b5-bf35-4a34-83c9-235008eaf116","Metal-Organic-Framework mediated supported-cobalt catalysts in multiphase hydrogenation reactions","Sun, X. (TU Delft ChemE/Catalysis Engineering)","Kapteijn, F. (promotor); Gascon, Jorge (promotor); Delft University of Technology (degree granting institution)","2017","The production of most industrially important chemicals involves catalysis. Depending on the difference in phases between the catalysts and reactants, one distinguishes homogenous catalysis and heterogeneous catalysis, with the latter being more attractive in real applications, due to the easy separation of products from catalysts and reusing the latter. In spite of the research and development of heterogeneous catalysts for decades, the exploration for catalysts system with outstanding activity, stability and selectivity remains a challenging task. In general, most of the chemical reactions occur on the surface atoms of supported metal (oxide) nanoparticles. Therefore, to address this challenge, current studies generally focus on understanding the relation between the catalytic performance and catalyst properties by controlling the particle size and distribution, and even
the shape of supported nanoparticles, and the interaction between nanoparticles and support. In order to further contribute to this objective, in this thesis we applied metal-organic-frameworks (MOFs) as a sacrificial precursor to produce catalysts for catalytic hydrogenation reactions, important routes for the production of a variety of fine and bulk chemicals in industry.","","en","doctoral thesis","","978-94-028-0808-7","","","","","","","","","ChemE/Catalysis Engineering","","",""
"uuid:2199548a-7978-4ebb-98fe-d978435416d7","http://resolver.tudelft.nl/uuid:2199548a-7978-4ebb-98fe-d978435416d7","Metal–Organic Framework Mediated Cobalt/Nitrogen-Doped Carbon Hybrids as Efficient and Chemoselective Catalysts for the Hydrogenation of Nitroarenes","Sun, X. (TU Delft ChemE/Catalysis Engineering); Olivos Suarez, A.I. (TU Delft ChemE/Catalysis Engineering); Oar-Arteta Gonzalez, L. (TU Delft ChemE/Catalysis Engineering); Rozhko, E. (TU Delft ChemE/Catalysis Engineering); Osadchii, D. (TU Delft ChemE/Catalysis Engineering); Bavykina, A.V. (TU Delft ChemE/Catalysis Engineering); Kapteijn, F. (TU Delft ChemE/Catalysis Engineering); Gascon, Jorge (TU Delft ChemE/Catalysis Engineering)","","2017","A Co@N-doped carbon (Co@ NC) hybrid was synthesized by thermal decomposition of the metal–organic framework (MOF) ZIF-67 under N2 atmosphere. These hybrid materials exhibit outstanding catalytic activity and chemoselectivity for the conversion of a wide range of substituted nitroarenes to their corresponding anilines under relatively mild reaction conditions. The high catalytic performance is attributed to the formation of cobalt nanoparticles and to the presence of atomically dispersed Co species in close interaction with nitrogen-doped graphene. Both active species are formed in situ during the pyrolytic transformation of ZIF-67. The catalysts could be reused in consecutive runs, exhibiting a slightly lower activity ascribed to blockage of the active sites by strongly adsorbed reaction species. These results open up a pathway for the design of noble-metal-free solid catalysts for industrial applications.","chemoselectivity; cobalt; deactivation; hydrogenation; N-doped carbon","en","journal article","","","","","","","","2018-04-24","","","ChemE/Catalysis Engineering","","",""
"uuid:ab6abe7a-5855-464f-81d8-6c1d446619c1","http://resolver.tudelft.nl/uuid:ab6abe7a-5855-464f-81d8-6c1d446619c1","Metal organic frameworks as precursors for the manufacture of advanced catalytic materials","Oar-Arteta Gonzalez, L. (TU Delft ChemE/Catalysis Engineering); Wezendonk, T.A. (TU Delft ChemE/Catalysis Engineering); Sun, X. (TU Delft ChemE/Catalysis Engineering); Kapteijn, F. (TU Delft ChemE/Catalysis Engineering); Gascon, Jorge (TU Delft ChemE/Catalysis Engineering)","","2017","The use of metal organic frameworks as hard templates for the preparation of heterogeneous catalysts is thoroughly reviewed. In this critical article, the main factors to consider when using a MOF as a sacrificial template are first discussed. Then, the existing literature on the topic is reviewed, classifying the different examples according to the MOF metal. Finally, the main advantages, limitations and perspectives of the so-called MOF mediated synthesis are outlined.","","en","journal article","","","","","","","","","","","ChemE/Catalysis Engineering","","",""
"uuid:9e885273-15b4-4dbd-94e7-152c67577d5f","http://resolver.tudelft.nl/uuid:9e885273-15b4-4dbd-94e7-152c67577d5f","Ruthenium particle size and cesium promotion effects in Fischer-Tropsch synthesis over high-surface-area graphite supported catalysts","Eslava, José L. (Instituto de Catálisis y Petroleoquímica); Sun, X. (TU Delft ChemE/Catalysis Engineering); Gascon, Jorge (TU Delft ChemE/Catalysis Engineering); Kapteijn, F. (TU Delft ChemE/Catalysis Engineering); Rodríguez-Ramos, Inmaculada (Instituto de Catálisis y Petroleoquímica)","","2017","The effect of ruthenium particle size on Fischer-Tropsch synthesis (FTS) has been studied at 513 K, H2/CO = 2 and 15 bar. Supported Ru catalysts with particle sizes ranging from 1.7 to 12 nm were prepared by using different Ru loadings and two different high surface area graphite (HSAG) supports to minimize the metal-support interaction. In addition, the effect of promotion with Cs is also evaluated. Microcalorimetric characterization during CO adsorption and XPS reveal a clear interaction between Ru and Cs. The FTS with Ru-based catalysts is, independent of the presence of promoter, highly structure-sensitive when the Ru particle size is under 7 nm. In this range the turnover frequency (TOF) for CO conversion increases with particle size, reaching a near constant value for Ru particles larger than 7 nm. Cs promoted catalysts display lower TOF values than the corresponding unpromoted samples. This somewhat reduced activity is attributed to the stronger CO adsorption on Cs promoted catalysts, as demonstrated by CO adsorption microcalorimetry. Product selectivity depends also on Ru particle size. Selectivity to C5+ hydrocarbons increases with increasing Ru particle size. For Cs-promoted catalysts, the olefin to paraffin ratio in the C2-C4 hydrocarbons range is independent of the Ru particle size, whereas it decreases for the unpromoted catalysts, showing the prevailing influence of the promoter.","","en","journal article","","","","","","","","2018-02-17","","","ChemE/Catalysis Engineering","","",""
"uuid:aed4c51f-12a8-45a8-a5ae-3561bf020907","http://resolver.tudelft.nl/uuid:aed4c51f-12a8-45a8-a5ae-3561bf020907","Carbon/H-ZSM-5 composites as supports for bi-functional Fischer-Tropsch synthesis catalysts","Valero Romero, M.J. (Universidad de Málaga); Sartipi, S. (TU Delft ChemE/Catalysis Engineering); Sun, X (TU Delft ChemE/Catalysis Engineering); Rodríguez-Mirasol, J. (Universidad de Málaga); Cordero, T. (Universidad de Málaga); Kapteijn, F. (TU Delft ChemE/Catalysis Engineering); Gascon, Jorge (TU Delft ChemE/Catalysis Engineering)","","2016","Mesoporous H-ZSM-5-carbon composites, prepared via tetrapropylammonium hydroxide (TPAOH) post treatment of H-ZSM-5 followed by deposition of pyrolytic carbon, have been used as the support for the preparation of Co-based Fischer-Tropsch catalysts. The resulting catalysts display an improved performance during Fischer-Tropsch synthesis (FTS), with higher activity, higher selectivity towards C5-C9 (gasoline range) hydrocarbons and lower selectivity towards C1 (and C2) than Co/mesoH-ZSM5 (without pyrolytic carbon). This is due to the weaker metal-support interaction caused by the deposited carbon (as revealed by XPS) leading to a higher reducibility of the Co species. Further, the partial deactivation of the Brønsted acid sites by pyrolytic carbon deposition, as was observed by NH3-TPD, allows the modification of the zeolite acidity. Both the olefin to paraffin (O/P) and the isoparaffin to normal paraffin (I/N) ratios decrease with the increase in the carbon content, opening the door to further tune the catalytic performance in multifunctional FTS operations.","","en","journal article","","","","","","","","","","","ChemE/Catalysis Engineering","","",""
"uuid:185999ce-41f2-4cac-9c4d-27782df18fbf","http://resolver.tudelft.nl/uuid:185999ce-41f2-4cac-9c4d-27782df18fbf","Carbon/H-ZSM-5 composites as supports for bi-functional Fischer-Tropsch synthesis catalysts","Valero-Romero, M.J.; Sartipi, S.; Sun, X.; Rodríguez-Mirasol, J.; Cordero, T.; Kapteijn, F.; Gascon, J.","","2016","Mesoporous H-ZSM-5–carbon composites, prepared via tetrapropylammonium hydroxide (TPAOH) post treatment of H-ZSM-5 followed by deposition of pyrolytic carbon, have been used as the support for the preparation of Co-based Fischer–Tropsch catalysts. The resulting catalysts display an improved performance during Fischer–Tropsch synthesis (FTS), with higher activity, higher selectivity towards C5–C9 (gasoline range) hydrocarbons and lower selectivity towards C1 (and C2) than Co/mesoH-ZSM5 (without pyrolytic carbon). This is due to the weaker metal–support interaction caused by the deposited carbon (as revealed by XPS) leading to a higher reducibility of the Co species. Further, the partial deactivation of the Brønsted acid sites by pyrolytic carbon deposition, as was observed by NH3-TPD, allows the modification of the zeolite acidity. Both the olefin to paraffin (O/P) and the isoparaffin to normal paraffin (I/N) ratios decrease with the increase in the carbon content, opening the door to further tune the catalytic performance in multifunctional FTS operations.","Gold for Gold; Open Access","en","journal article","RSC Publishing","","","","","","","","Applied Sciences","Chemical Engineering","","","",""
"uuid:d6534414-b0fe-4b6b-af49-3d329f3326af","http://resolver.tudelft.nl/uuid:d6534414-b0fe-4b6b-af49-3d329f3326af","Institute of Poldering: Meadow Under Construction","Van Loon, F.D.; Pouderoijen, M.T.; Alberini, E.; Dijkstra, C.M.; Hagen, S.R.; De Jong, M.; Kiliço?lu, I.D.; Koukouvelou, A.; Mekel, M.L.; Schotting, K.; Shao, S.; Sun, X.; Terzi, O.; De Waal, W.; Van der Wal, I.A.; Zhang, B.","","2015","Booklet of the elective course AR0048 2014/2015 ‘Landscape Architecture ON site - being part of Oerol’, an elective course of the MSc2 - Chair of Landscape Architecture at the TU Delft.","landscape architecture; education; polder; climate change; meadow birds; Oerol; Terschelling","en","book","Chair of Landscape Architecture","","","","","","","","Architecture and The Built Environment","Urbanism","","","","53.385000, 5.320000"