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Wang, Y. (author), Posthuma De Boer, J (author), Makkee, M. (author)Simultaneous reduction of N2O in the presence of co-existing oxidants, especially NO, from industrial plants, is a challenging task. This study explores the applications of a hydrocarbon reduced Rh/Zr stabilized La doped ceria (Rh/CLZ) catalyst in N2O abatement from oxidant rich industrial exhaust streams e.g. NO, CO2, and O2. The reaction...journal article 2020
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Sun, X. (author), Jansma, H. (author), Miyama, Toshihito (author), Sanjeewa Aluthge, Rasika Dasanayake (author), Shinmei, Kenichi (author), Yagihashi, Noritoshi (author), Nishiyama, Haruka (author), Osadchii, D. (author), van der Linden, B. (author), Makkee, M. (author)Abstract: Mn and Li promoted Rh catalysts supported on SiO<sub>2</sub> with a thin TiO<sub>2</sub> layer were synthesized by stepwise incipient wetness impregnation approach. The thin TiO<sub>2</sub> layer on the surface of SiO<sub>2</sub> was proved to stabilize those small Rh nanoparticles and hinder their agglomeration. The reducibility of...journal article 2019
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Hapońska, Monika (author), Nurra, C. (author), Abelló, Sònia (author), Makkee, M. (author), Salvadó, Joan (author), Torras, Carles (author)A membrane reactor containing an immobilized heterogeneous catalyst is an alternative for traditional homogeneous-based catalyzed transesterification for biodiesel production. Major problems in homogeneous catalysis are related to catalyst recuperation and soap formation, which can be overcome by using heterogeneous catalysts. Conversion can...journal article 2019
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Márquez, Nathalie (author), Moulijn, J.A. (author), Makkee, M. (author), Kreutzer, M.T. (author), Castaño, Pedro (author)We describe the co-current flow pattern of gas and liquid through micro-fabricated beds of solid and pillars under variable (i) capillary number, (ii) contact angle or wettability and (iii) pillar arrangement, i.e. modifying the distance between pillars or their size and comparing regular with more chaotic systems. Laser-induced fluorescent...journal article 2019
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Farkhondehfal, M. A. (author), Hernández, S. (author), Rattalino, M. (author), Makkee, M. (author), Lamberti, A. (author), Chiodoni, A. (author), Bejtka, K. (author), Sacco, A. (author), Pirri, F. C. (author), Russo, N. (author)Huge efforts have been done in the last years on electrochemical and photoelectrochemical reduction of CO <sub>2</sub> to offer a sustainable route to recycle CO <sub>2</sub> . A promising route is to electrochemically reduce CO <sub>2</sub> into CO which, by combination with hydrogen, can be used as a feedstock to different added-value...journal article 2019
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Wang, Y. (author), Makkee, M. (author)The influence of potassium in Rh on a lanthium promoted zirconia stablised ceria (CZ) catalysts was studied toward NO<sub>x</sub>reduction reactivity and selectivity. The results are compared with a Rh/CZ catalyst. The samples were characterised by N<sub>2</sub> adsorption, XRD, SEM, ICP, and H<sub>2</sub>-TPR. The study highlighted the...journal article 2019
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Wang, Y. (author), Kapteijn, F. (author), Makkee, M. (author)In this study, the role of the noble metals Pt and Rh (0.5 wt.%) for the selective reduction of NO into N<sub>2</sub> is evaluated by the transient TAP technique and in-situ spectroscopy using a commercial stable ceria support (denoted as CZ) and applying isotopically labelled <sup>15</sup>NO and <sup>18</sup>O<sub>2</sub>. The transient...journal article 2018
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Wang, Y. (author), Makkee, M. (author)Toyota's Di-Air DeNO<sub>x</sub> system is a promising DeNO<sub>x</sub> system to meet NO<sub>x</sub> emission requirement during the real driving, yet, a fundamental understanding largely lacks, e.g. the benefit of fast frequency fuel injection. Ceria is the main ingredient in Di-Air catalyst composition. Hence, we investigated the reduction...journal article 2018
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Wang, Y. (author), Makkee, M. (author)Oxygen defects in reduced ceria are the catalytic sites for the NO reduction into N<sub>2</sub> in the Toyota Di-Air DeNO<sub>x</sub> abatement technology. Traces of NO (several hundred ppm) have to compete with the excess amount of other oxidants, e.g., 5% CO<sub>2</sub> and 5% O<sub>2</sub>, in an exhaust gas of a lean burn (diesel) engine....journal article 2018
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Melián-Cabrera, Ignacio (author), Zarubina, Valeriya (author), Nederlof, C. (author), Kapteijn, F. (author), Makkee, M. (author)Ethylbenzene oxidative dehydrogenation over γ-alumina under in situ conditions has revealed that the catalyst recovers fully the original conversion and selectivity under steady state conditions. In the transition state, the reactivated catalyst achieved the steady state conditions faster. This was supported by the physico-chemical...journal article 2018
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Berger, Marieke (author), de Boer, Johannes D. (author), Lutter, René (author), Makkee, M. (author), Sterk, Peter J. (author), Kemper, Elles M. (author), van der Zee, Jaring S. (author)Background: Inhalation of particulate matter, as part of air pollution, is associated with increased morbidity and mortality. Nanoparticles (< 100nm) are likely candidates for triggering inflammatory responses and activation of coagulation pathways because of their ability to enter lung cells and pass bronchial mucosa. We tested the...journal article 2017
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Bui, H.V. (author), Grillo, F. (author), Kulkarni, S.S. (author), Bevaart, Ronald (author), Nguyên, V.T. (author), van der Linden, B. (author), Moulijn, J.A. (author), Makkee, M. (author), Kreutzer, M.T. (author), van Ommen, J.R. (author)We tailored the size distribution of Pt nanoparticles (NPs) on graphene nanoplatelets at a given metal loading by using low-temperature atomic layer deposition carried out in a fluidized bed reactor operated at atmospheric pressure. The Pt NPs deposited at low temperature (100 °C) after 10 cycles were more active and stable towards the...journal article 2017
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Wang, Y. (author), Oord, Ramon (author), van den Berg, D. (author), Weckhuysen, Bert M. (author), Makkee, M. (author)Currently commercial NO<sub>x</sub> removal (DeNO<sub>x</sub>) abatement systems for lean-burn engines exceed regulation limits on the road for NO<sub>x</sub> emissions. Commercial DeNO<sub>x</sub> catalysts exhibit poor performance in the selective conversion of NO to N<sub>2</sub>, especially at high temperature and high gas hourly space...journal article 2017
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Bavykina, A.V. (author), Olivos Suarez, A.I. (author), Osadchii, D. (author), Valecha, R.R. (author), Franz, R.P.M. (author), Makkee, M. (author), Kapteijn, F. (author), Gascon, Jorge (author)A quasi chemical vapor deposition method for the manufacture of well-defined covalent triazine framework (CTF) coatings on cordierite monoliths is reported. The resulting supported porous organic polymer is an excellent support for the immobilization of two different homogeneous catalysts: (1) an Ir<sup>III</sup>Cp∗-based catalyst for the...journal article 2017
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Hernández, S. (author), Amin Farkhondehfal, M. (author), Sastre, Francesc (author), Makkee, M. (author), Saracco, G. (author), Russo, Nunzio (author)The CO2 that comes from the use of fossil fuels accounts for about 65% of the global greenhouse gases emissions, and it plays a critical role in global climate changes. Among the different strategies that have been considered to address the storage and reutilization of CO2, the transformation of CO2 into chemicals or fuels with a high added...journal article 2017
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Bavykina, A.V. (author), Mautscke, H.H. (author), Makkee, M. (author), Kapteijn, F. (author), Gascon, Jorge (author), Llabres i Xamena, FX (author)Isomerisation of allylic alcohols to saturated ketones can be efficiently catalysed by a heterogeneous molecular system resulting from IrIIICp* anchoring to a covalent triazine framework. The obtained catalysts are active, selective, and fully recyclable.journal article 2017
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Makkee, M. (author), Wang, Y. (author)We studied the mechanism of NO reduction as well as its selectivity and reactivity in the presence of excess O<sub>2</sub>. Results show that fuel injection and/or pretreatment are important for ceria catalyst reduction and carbon deposition on the catalyst surface. Oxygen defects of reduced ceria are the key sites for the reduction of NO...journal article 2017
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Rozhko, E. (author), Bavykina, A.V. (author), Osadchii, D. (author), Makkee, M. (author), Gascon, Jorge (author)The use of two different classes of covalent organic frameworks (covalent triazine and imine linked frameworks) as supports for molecular Ni<sup>2+</sup> catalysts is presented. For COFs, a large concentration of N heteroatoms, either in the form of quasi bipyridine or as diiminopyridine moieties, allows for the coordination of NiBr<sub>2<...journal article 2017
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Santos, Vera P. (author), Borgers, Liam (author), Sartipi, Sina (author), van der Linden, B. (author), Dugulan, A.I. (author), Chojecki, A (author), Davidian, T (author), Ruitenbeek, M (author), Meima, GR (author), Kapteijn, F. (author), Makkee, M. (author), Gascon, Jorge (author)tA series of Fe-Ti mixed oxide model catalysts containing different Ti/Fe ratios were synthesized andapplied as catalysts for the High Temperature Fischer-Tropsch reaction (HTFTS). XRD, H2-TPR and in situMössbauer and XAFS spectroscopy were applied to evaluate the role of Ti on the physical and chemicalproperties of Fe within the mixed metal...journal article 2017
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Álvarez, Andrea (author), Bansode, Atul (author), Urakawa, Atsushi (author), Bavykina, A.V. (author), Wezendonk, T.A. (author), Makkee, M. (author), Gascon, Jorge (author), Kapteijn, F. (author)The recent advances in the development of heterogeneous catalysts and processes for the direct hydrogenation of CO2 to formate/formic acid, methanol, and dimethyl ether are thoroughly reviewed, with special emphasis on thermodynamics and catalyst design considerations. After introducing the main motivation for the development of such processes,...journal article 2017