- document
-
Liu, C. (author), Uslamin, E. (author), Pidko, E.A. (author), Kapteijn, F. (author)Monitoring complex catalytic pathways under industrially-relevant conditions is one of the key challenges in catalysis chemistry and technology. Herewith we describe a direct technique called ‘fast scanning-pulse analysis’ (FASPA) that allows the direct characterization and detailed kinetic analysis of intimately interweaved catalytic...journal article 2023
- document
-
Dvir, T. (author), Wang, Guanzhong (author), van Loo, N. (author), Liu, C. (author), Mazur, G.P. (author), Bordin, A. (author), ten Haaf, S.L.D. (author), van Driel, D. (author), Zatelli, F. (author), Li, X. (author), Malinowski, F.K. (author), Gazibegovic, Sasa (author), Badawy, G.H.A. (author), Bakkers, Erik P.A.M. (author), Wimmer, M.T. (author), Kouwenhoven, Leo P. (author)Majorana bound states constitute one of the simplest examples of emergent non-Abelian excitations in condensed matter physics. A toy model proposed by Kitaev shows that such states can arise at the ends of a spinless p-wave superconducting chain<sup>1</sup>. Practical proposals for its realization<sup>2,3</sup> require coupling neighbouring...journal article 2023
- document
-
Liu, C. (author), Uslamin, E. (author), Pidko, E.A. (author), Kapteijn, F. (author)The nature of hydrocarbon pool (HCP) intermediates in the methanol-to-hydrocarbons (MTH) process has been thoroughly investigated, especially for BEA- and CHA-type zeolite catalysts like H-β and H-SAPO-34. Herein, we further reveal the dynamic mechanistic details of the MTH process over the H-ZSM-5 catalyst at 400 °C, based on the dual-cycle...journal article 2023
- document
-
Liu, C. (author)The MTH process is recognized as one of the key ingredients of the methanol (MeOH) economy concept enabling the production of crucial hydrocarbon building blocks, such as light olefins and aromatics, starting from CO2 as the primary carbon source. Besides the driving force of reducing reliance on fossil fuels, the highly tunable nature of this...doctoral thesis 2022
- document
-
Liu, C. (author), van Kampen, E. (author)Reinforcement learning (RL) equipped with neural networks has recently led to a wide range of successes in learning policies for unmanned aerial vehicle (UAV) navigation and control problems. The success of RL relies on two human-designed heuristics: appropriate action space definition and reward function engineering. The commonly used fully...conference paper 2022
- document
-
He, Songbo (author), Kramer, Thomas Sjouke (author), Klein, Frederike Gerda Hiltje (author), Chandel, Anshu (author), Tegudeer, Zhuorigebatu (author), Heeres, Andre (author), Liu, C. (author), Pidko, E.A. (author), Heeres, Hero Jan (author)The catalytic conversion of glycerol to aromatics (GTA, e.g., benzene, toluene, and xylenes, BTX) over a shaped H-ZSM-5/Al<sub>2</sub>O<sub>3</sub> (60/40 wt%) catalyst was investigated in a continuous fixed-bed reactor to study the addition of the Al<sub>2</sub>O<sub>3</sub> binder in the catalyst formulation on catalyst performance. The...journal article 2022
- document
-
Li, Z. (author), Liang, X. (author), Liu, C. (author), Liang, M. (author), van Breugel, K. (author), Ye, G. (author)This study investigates the deformation of free and stress of restrained alkali-activated slag concrete (AASC), respectively, under semi-adiabatic condition. The concrete shows first thermal expansion, which is compensated soon by autogenous shrinkage. The subsequent cooling down of the concrete aggravates shrinkage and development of tensile...journal article 2022
- document
-
Liu, C. (author), Yang, Lu (author), Li, Z. (author), Nie, Shuai (author), Hu, Chuanlin (author), Wang, Fazhou (author)Due to the satisfactory property and high productivity, heat-cured concretes have been widely used in engineering practice. However, heat curing process also brings some drawbacks that are detrimental to the long-term property of this material. To address this issue, lightweight fine aggregate (LWFA) was employed to provide internal curing ...journal article 2022
- document
-
Rigotti Manesco, A.L. (author), Flór, Ian Matthias (author), Liu, C. (author), Akhmerov, A.R. (author)We simulate a hybrid superconductor-graphene device in the quantum Hall regime to identify the origin of downstream resistance oscillations in a recent experiment [Zhao et al. Nature Physics 16, (2020)]. In addition to the previously studied Mach-Zehnder interference between the valley-polarized edge states, we consider disorder-induced...journal article 2022
- document
-
Liu, C. (author), Wang, Guanzhong (author), Dvir, T. (author), Wimmer, M.T. (author)Semiconductor quantum dots have proven to be a useful platform for quantum simulation in the solid state. However, implementing a superconducting coupling between quantum dots mediated by a Cooper pair has so far suffered from limited tunability and strong suppression. This has limited applications such as Cooper pair splitting and quantum...journal article 2022
- document
-
Wang, Guanzhong (author), Dvir, T. (author), Mazur, G.P. (author), Liu, C. (author), van Loo, N. (author), ten Haaf, S.L.D. (author), Bordin, A. (author), Gazibegovic, Sasa (author), Badawy, G.H.A. (author), Bakkers, Erik P.A.M. (author), Wimmer, M.T. (author), Kouwenhoven, Leo P. (author)In most naturally occurring superconductors, electrons with opposite spins form Cooper pairs. This includes both conventional s-wave superconductors such as aluminium, as well as high-transition-temperature, d-wave superconductors. Materials with intrinsic p-wave superconductivity, hosting Cooper pairs made of equal-spin electrons, have not...journal article 2022
- document
-
Castro-Fernández, Pedro (author), Mance, Deni (author), Liu, C. (author), Abdala, Paula M. (author), Willinger, Elena (author), Rossinelli, Aurelio A. (author), Serykh, Alexander I. (author), Pidko, E.A. (author), Copéret, Christophe (author), Fedorov, Alexey (author), Müller, Christoph R. (author)Three γ/β-Ga<sub>2</sub>O<sub>3</sub> nanoparticle catalysts that differ in the relative ratio of γ-Ga<sub>2</sub>O<sub>3</sub> to β-Ga<sub>2</sub>O<sub>3</sub> were prepared to evaluate the effect of H<sub>2</sub> treatment (500 °C, 2 h) on the coordination environment of bulk and surface Ga sites, Lewis acidity and catalytic activity in...journal article 2022
- document
-
Liu, C. (author), Uslamin, E. (author), Khramenkova, E. (author), Sireci, Enrico (author), Ouwehand, Lucas T.L.J. (author), Ganapathy, S. (author), Kapteijn, F. (author), Pidko, E.A. (author)The production of valuable aromatics and the rapid catalyst deactivation due to coking are intimately related in the zeolite-catalyzed aromatization reactions. Here, we demonstrate that these two processes can be decoupled by promoting the Ga/HZSM-5 aromatization catalyst with Ca. The resulting bimetallic catalysts combine high selectivity to...journal article 2022
- document
-
Liu, C. (author), Uslamin, E. (author), van Vreeswijk, Sophie H. (author), Yarulina, Irina (author), Ganapathy, S. (author), Weckhuysen, Bert M. (author), Kapteijn, F. (author), Pidko, E.A. (author)Identification of the catalyst characteristics correlating with the key performance parameters including selectivity and stability is key to the rational catalyst design. Herein we focused on the identification of property-performance relationships in the methanol-to-olefin (MTO) process by studying in detail the catalytic behaviour of MFI,...journal article 2022
- document
-
He, Songbo (author), Zuur, Kenny (author), Santosa, Dian Sukmayanda (author), Heeres, Andre (author), Liu, C. (author), Pidko, E.A. (author), Heeres, Hero Jan (author)The catalytic conversion of pure glycerol to bio-aromatics (bio-BTX) over an un-modified H-ZSM-5 (SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> molar ratio of 23) via an ex-situ catalytic pyrolysis approach in a continuous tandem-micro reactor at a scale of 1 g glycerol h<sup>−1</sup> was investigated. A BTX peak carbon yield of 28.1 ± 0.2 %...journal article 2021
- document
-
He, Songbo (author), Goldhoorn, Hero Reinder (author), Tegudeer, Zhuorigebatu (author), Chandel, Anshu (author), Heeres, Andre (author), Liu, C. (author), Pidko, E.A. (author), Heeres, Hero Jan (author)The use of H-ZSM-5 with various binders (Al<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub>, and kaolinite, 10 wt% on catalyst formulation) for the catalytic conversion of glycerol to bio-based aromatics (GTA) was investigated in a continuous bench-scale unit at a pyrolysis temperature of 450 °C, catalytic upgrading temperature of 500 °C, WHSV of...journal article 2021
- document
-
De Almeida Nascimento e Melo, A.A. (author), Liu, C. (author), Rozek, P.M. (author), Rosdahl, T.O. (author), Wimmer, M.T. (author)Tunneling conductance spectroscopy in normal metal-superconductor junctions is an important tool for probing Andreev bound states in mesoscopic superconducting devices, such as Majorana nanowires. In an ideal superconducting device, the subgap conductance obeys specific symmetry relations, due to particle-hole symmetry and unitarity of the...journal article 2021
- document
-
Liu, C. (author), van Heck, B. (author), Wimmer, M.T. (author)We study the equilibrium dc Josephson current in a junction between an s-wave and a topological superconductor. Cooper pairs from the s-wave superconducting lead can transfer to the topological side either via an unpaired Majorana zero mode localized near the junction or via the above-gap continuum states. We find that the Majorana...journal article 2021
- document
-
Liu, C. (author), Schuwalow, Sergej (author), liu, Y. (author), Vilkelis, K. (author), Manesco, A. L.R. (author), Krogstrup, P. (author), Wimmer, M.T. (author)We study the electronic properties of InAs/EuS/Al heterostructures as explored in a recent experiment, combining both spectroscopic results and microscopic device simulations. In particular, we use angle-resolved photoemission spectroscopy to investigate the band bending at the InAs/EuS interface. The resulting band offset value serves as an...journal article 2021
- document
-
Liu, C. (author), Liu, Dong E. (author), Zhang, Fu Chun (author), Chiu, Ching Kai (author)The successful testing of non-Abelian statistics not only serves as a milestone in fundamental physics but also provides a quantum-gate operation in topological quantum computation. An accurate and efficient readout scheme of a topological qubit is an essential step toward the experimental confirmation of non-Abelian statistics. In the...journal article 2019