Searched for: department%3A%22ChemE%255C%257Eslsh%257EChemical%255C+Engineering%22
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de Raad, B.W. (author), van Lieshout, Marit (author), Stougie, L. (author), Ramirez, Andrea (author)
Heat pumps are a promising option to decarbonize the industrial sector. However, their performance at a plant-level can be affected by other process changes. In this work, process changes that improve the heat pump's performance have been identified using Process Change Analysis (PCA), where the background pinch point is used as a reference...
journal article 2024
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Luo, J. (author), Pérez-Fortes, Mar (author), Ibarra Gonzalez, P. (author), Straathof, Adrie J.J. (author), Ramirez, Andrea (author)
Combining intermittent renewable electricity (IRE) with carbon capture and utilisation is urgently needed in the chemical sector. In this context, microbial electrosynthesis (MES) has gained attention. It can electrochemically produce hexanoic acid, a value-added chemical, from CO<sub>2</sub>. However, there is a lack of understanding...
journal article 2024
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Colombi, G. (author), Boshuizen, B. (author), Chaykina, D. (author), Hsu, Y. (author), Schreuders, H. (author), Savenije, T.J. (author), Dam, B. (author)
At ambient conditions, rare-earth oxyhydride thin films show reversible photochromism and photoconductivity, while their mechanism and relation are still unclear. In this work, this question is explored with in situ time-resolved measurements of both optical and transport properties of Gd-based oxyhydride thin films. It is found that p-type...
journal article 2023
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Chaykina, D. (author), Colombi, G. (author), Schreuders, H. (author), Dam, B. (author)
Photochromism has been reported for several rare-earth (RE) metal oxyhydride thin films and is characterized by a reversible darkening of the sample when exposed to light with energy greater than its optical bandgap. Here, we extend the range of known photochromic RE-oxyhydrides to include samarium oxyhydrides. These SmH3−2xOx thin films are...
journal article 2023
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Banerjee, Shrestha (author), Chaykina, D. (author), Stigter, Marinus (author), Colombi, G. (author), Eijt, S.W.H. (author), Dam, B. (author), de Wijs, Gilles A. (author), Kentgens, Arno P.M. (author)
Rare earth oxyhydrides REO<sub>x</sub>H<sub>(3-2x)</sub>, with RE = Y, Sc, or Gd and a cationic FCC lattice, are reversibly photochromic in nature. It is known that structural details and anion (O<sup>2-</sup>:H<sup>-</sup>) composition dictate the efficiency of the photochromic behavior. The mechanism behind the photochromism is, however,...
journal article 2023
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Wiltink, T.J. (author), Yska, Stijn (author), Ramirez, Andrea (author), Pérez-Fortes, Mar (author)
Electrochemical reduction of CO2 (CO2ER) is an emerging technology with the potential to limit the use of fossil-based feedstocks in the petrochemical industry by converting CO2 and renewable electricity into useful products such as syngas. Its successful deployment will depend not only on the technology's performance but also on its integration...
book chapter 2023
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Bannenberg, L.J. (author), Schreuders, H. (author), van Beugen, N. (author), Kinane, Christy (author), Hall, Stephen (author), Dam, B. (author)
Accurate, cost-efficient, and safe hydrogen sensors will play a key role in the future hydrogen economy. Optical hydrogen sensors based on metal hydrides are attractive owing to their small size and costs and the fact that they are intrinsically safe. These sensors rely on suitable sensing materials, of which the optical properties change...
journal article 2023
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de Raad, B.W. (author), van Lieshout, Marit (author), Stougie, L. (author), Ramirez, Andrea (author)
Steam generating heat pumps show great potential for reducing carbon emissions in the industrial sector. However, predicting their performance is challenging as the exergy destruction of e.g., compressors and expansion valves increases with the temperature lift and condenser temperature. With over seventy design improvements mentioned in the...
conference paper 2023
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Wang, N. (author), Verzijlbergh, R.A. (author), Heijnen, P.W. (author), Herder, P.M. (author)
Energy system optimization models are widely used to aid long-term investment decision-making for energy systems. From a socio-technical system viewpoint, existing models focus on the cost modeling of the technical subsystem, while the indirect costs of the social subsystem are not often modeled. This paper incorporates indirect costs into such...
journal article 2023
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Wu, Z. (author), De Krom, Tom (author), Colombi, G. (author), Chaykina, D. (author), Van Hattem, Gijs (author), Schut, H. (author), Dickmann, Marcel (author), Brück, E.H. (author), Dam, B. (author), Eijt, S.W.H. (author)
Rare-earth (RE) oxyhydride thin films show a color-neutral, reversible photochromic effect at ambient conditions. The origin of the photochromism is the topic of current investigations. Here, we investigated the lattice defects, electronic structure, and crystal structure of photochromic YHxOy and GdHxOy thin films deposited by magnetron...
journal article 2022
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Chaykina, D. (author), Usman, I.N. (author), Colombi, G. (author), Schreuders, H. (author), Tyburska-Pueschel, Beata (author), Wu, Z. (author), Eijt, S.W.H. (author), Bannenberg, L.J. (author), De Wijs, Gilles A. (author), Dam, B. (author)
The energy axes of the RBS and ERD data (contained in Figures 2a,b,d,e, and S4) were originally underestimated, and the corrected figures appear below and in the Supporting Information. The change is in the conversion from raw data to the energy scale, which was initially converted incorrectly. The rescaled x-axis does not change the data...
journal article 2022
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Venugopal, A. (author), Egberts, Laurentius H.T. (author), Meeprasert, J. (author), Pidko, E.A. (author), Dam, B. (author), Burdyny, T.E. (author), Sinha, V. (author), Smith, W.A. (author)
Finding alternative ways to tailor the electronic properties of a catalyst to actively and selectively drive reactions of interest has been a growing research topic in the field of electrochemistry. In this Letter, we investigate the tuning of the surface electronic properties of electrocatalysts via polymer modification. We show that when a...
journal article 2022
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Borgul, Paulina (author), Sobczak, Karolina (author), Rudnicki, Konrad (author), Glazer, P.J. (author), Pawlak, Patrycja (author), Trynda, Anna (author), Skrzypek, Sławomira (author), Poltorak, Lukasz (author)
In this work, we have used cyclic voltammetry to investigate the interfacial behavior of cocaine cutting agents at the electrified liquid-liquid interface formed between a solution of the water and 1,2-dichloroethane phases. Among 27 chemical species used to adulterate cocaine street samples, only 8 were detectable in the available potential...
journal article 2022
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Colombi, G. (author), Stigter, Marinus (author), Chaykina, D. (author), Banerjee, Shrestha (author), Kentgens, Arno P.M. (author), Eijt, S.W.H. (author), Dam, B. (author), De Wijs, Gilles A. (author)
In this paper, we investigate by ab initio DFT how the O:H ratio influences the formation and lattice energy, metastability, and optical properties of Y and La anion-disordered ROxH3-2x oxyhydrides. To achieve this, a set of special quasirandom structures (SQS) is introduced to model anion-disorder along the whole RH3-R2O3 composition line. A...
journal article 2022
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Chaykina, D. (author), Usman, I.N. (author), Colombi, G. (author), Schreuders, H. (author), Tyburska-Pueschel, Beata (author), Wu, Z. (author), Eijt, S.W.H. (author), Bannenberg, L.J. (author), De Wijs, Gilles A. (author), Dam, B. (author)
To develop an understanding of the photochromic effect in rare-earth metal oxyhydride thin films (REH3-2xOx, here RE = Y), we explore the aliovalent doping of the RE cation. We prepared Ca-doped yttrium oxyhydride thin films ((CazY1-z)HxOy) by reactive magnetron cosputtering with Ca doping concentrations between 0 and 36 at. %. All of the...
journal article 2022
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Maddalena, L. (author), Ouwehand, M. (author), Safdar, H. (author), Carroll, E.C.M. (author)
In deep tissue imaging, pulsed near-infrared lasers commonly provide high peak powers needed for nonlinear absorption, but average power and linear absorption can be limiting factors for tissue damage through heat. We implemented intra-cavity dumping within a mode-locked Ti:Sapphire laser used for two-photon computer generated holography...
journal article 2022
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Pérez-Fortes, Mar (author), Vos, Josephine (author), Wiltink, T.J. (author), de Bruijn, J.A. (author), Tan, Tarkan (author), Mutlu, Nevin (author), Alkemade, Floor (author), Ramirez, Andrea (author)
The storage of renewable electricity in chemical bonds is a compelling technological option that combines flexibility with the synthesis of high energy-dense fuels and chemicals and may use CO2 as raw material. The electrochemical conversion of CO2 is not yet a mature technology. Both fields, electrochemical conversion and carbon dioxide...
conference paper 2022
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Erdbrügger, Uta (author), Blijdorp, Charles J. (author), Bijnsdorp, Irene V. (author), Borràs, Francesc E. (author), Bussolati, Benedetta (author), Byrd, James Brian (author), Jenster, G. (author), van Royen, M.E. (author), van Steijn, V. (author)
Urine is commonly used for clinical diagnosis and biomedical research. The discovery of extracellular vesicles (EV) in urine opened a new fast-growing scientific field. In the last decade urinary extracellular vesicles (uEVs) were shown to mirror molecular processes as well as physiological and pathological conditions in kidney, urothelial...
journal article 2021
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Chaykina, D. (author), Nafezarefi, F. (author), Colombi, G. (author), Cornelius, S. (author), Bannenberg, L.J. (author), Schreuders, H. (author), Dam, B. (author)
Thin films of rare earth metal oxyhydrides show a photochromic effect, the precise mechanism of which is yet unknown. Here, we made thin films of NdH3-2xOx and show that we can change the band gap, crystal structure, and photochromic contrast by tuning the composition (O2-:H-) via the sputtering deposition pressure. To protect these films...
journal article 2021
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Lehner, B. (author), Benz, D. (author), Moshkalev, Stanislav A. (author), Meyer, Anne S. (author), Cotta, Monica A. (author), Janissen, R. (author)
Graphene oxide (GO) has immense potential for widespread use in diverse in vitro and in vivo biomedical applications owing to its thermal and chemical resistance, excellent electrical properties and solubility, and high surface-to-volume ratio. However, development of GO-based biological nanocomposites and biosensors has been hampered by its...
journal article 2021
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