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Ripepi, D. (author)In the last century, the indiscriminate use of fossil energy to power the industrial revolution and technological progress of humankind, has led to the depletion of limited natural resources and, most importantly, the emission and accumulation of alarming levels of pollutants and greenhouse gases (GHG) in the atmosphere. One of the major...doctoral thesis 2023
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De Ridder, J. (author), Ripepi, V. (author), Aerts, C. (author), Palaversa, L. (author), Eyer, L. (author), Holl, B. (author), Audard, M. (author), Rimoldini, L. (author), Hladczuk, N.A. (author)Context. The third Gaia data release provides photometric time series covering 34 months for about 10 million stars. For many of those stars, a characterisation in Fourier space and their variability classification are also provided. This paper focuses on intermediate- to high-mass (IHM) main sequence pulsators (M'a ¥''1.3'M') of spectral...journal article 2023
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De Ridder, J. (author), Ripepi, V. (author), Aerts, C. (author), Palaversa, L. (author), Eyer, L. (author), Holl, B. (author), Audard, M. (author), Rimoldini, L. (author), Hladczuk, N.A. (author)Context. The Gaia mission of the European Space Agency (ESA) has been routinely observing Solar System objects (SSOs) since the beginning of its operations in August 2014. The Gaia data release three (DR3) includes, for the first time, the mean reflectance spectra of a selected sample of 60 518 SSOs, primarily asteroids, observed between August...journal article 2023
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Abdinejad, M. (author), Subramanian, S.S. (author), Motlagh, Mozhgan Khorasani (author), Ripepi, D. (author), Pinto, D. (author), Li, Mengran (author), Middelkoop, J. (author), Urakawa, A. (author), Burdyny, T.E. (author)The electrochemical CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) is an attractive method to produce renewable fuel and chemical feedstock using clean energy sources. Formate production represents one of the most economical target products from CO<sub>2</sub>RR but is primarily produced using post-transition metal catalysts that...journal article 2023
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De Ridder, J. (author), Ripepi, V. (author), Aerts, C. (author), Palaversa, L. (author), Eyer, L. (author), Holl, B. (author), Audard, M. (author), Rimoldini, L. (author), Hladczuk, N.A. (author)Context. The Gaia DR3 catalogue contains, for the first time, about 800 000 solutions with either orbital elements or trend parameters for astrometric, spectroscopic, and eclipsing binaries, and combinations of these three.<br/><br/>Aims. With this paper, we aim to illustrate the huge potential of this large non-single-star catalogue.<br/><br/...journal article 2023
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Drimmel, R. (author), Romero-Gomez, M. (author), Chemin, L. (author), Ramos, P. (author), Poggio, E. (author), Ripepi, V. (author), Andrae, R. (author), Blomme, R. (author), Hladczuk, N.A. (author)Context. With the most recent Gaia data release, the number of sources with complete 6D phase space information (position and velocity) has increased to well over 33 million stars, while stellar astrophysical parameters are provided for more than 470 million sources, and more than 11 million variable stars are identified. Aims. Using the...journal article 2023
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- Izelaar, B. (author), Ripepi, D. (author), van Noordenne, D.D. (author), Jungbacker, M.P. (author), Kortlever, R. (author), Mulder, F.M. (author) journal article 2023
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Iglesias van Montfort, H.P. (author), Li, Mengran (author), Irtem, I.E. (author), Abdinejad, M. (author), Wu, Yuming (author), Pal, S.K. (author), Sassenburg, M. (author), Ripepi, D. (author), Subramanian, S.S. (author), Biemolt, J. (author), Rufford, Thomas E. (author), Burdyny, T.E. (author)Electrochemical reduction of CO<sub>2</sub> presents an attractive way to store renewable energy in chemical bonds in a potentially carbon-neutral way. However, the available electrolyzers suffer from intrinsic problems, like flooding and salt accumulation, that must be overcome to industrialize the technology. To mitigate flooding and salt...journal article 2023
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Izelaar, B. (author), Ripepi, D. (author), Asperti, S. (author), Dugulan, A.I. (author), Hendrikx, R.W.A. (author), Bottger, A.J. (author), Mulder, F.M. (author), Kortlever, R. (author)The electrochemical dinitrogen reduction reaction (NRR) has recently gained much interest as it can potentially produce ammonia from renewable intermittent electricity and replace the Haber-Bosch process. Previous literature studies report Fe- and Mo-carbides as promising electrocatalysts for the NRR with activities higher than other metals....journal article 2023
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Ripepi, D. (author), Schreuders, H. (author), Mulder, F.M. (author)Ammonia is an indispensable commodity and a potential carbon free energy carrier. The use of H permeable electrodes to synthesize ammonia from N <sub>2</sub>, water and electricity, provides a promising alternative to the fossil fuel based Haber-Bosch process. Here, H permeable Ni electrodes are investigated in the operating temperature range...journal article 2023
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Ripepi, D. (author), Zaffaroni, R. (author), Kolen, M. (author), Middelkoop, J. (author), Mulder, F.M. (author)Rapid advances in electrocatalytic ammonia synthesis are impeded by laborious detection methods commonly used in the field and by constant risk of external contaminations, which generates misleading false positives. We developed a facile real-time GC-MS method for sensitive isotope NH3 quantification, requiring no external sample manipulations....journal article 2022
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Burdyny, T.E. (author), Sassenburg, M. (author), de Rooij, R. (author), Nessbit, Nathan (author), Kas, R. (author), Chandrashekar, S. (author), Firet, N.J. (author), Yang, K. (author), Liu, K. (author), Blommaert, M.A. (author), Kolen, M. (author), Ripepi, D. (author), Smith, W.A. (author)Continued advancements in the electrochemical reduction of CO 2 (CO 2RR) have emphasized that reactivity,selectivity, and stability are not explicit material properties butcombined effects of the catalyst, double-layer, reaction environ-<br/>ment, and system configuration. These realizations have steadily built upon the foundational work...journal article 2022
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Kolen, M. (author), Ripepi, D. (author), Smith, W.A. (author), Burdyny, T.E. (author), Mulder, F.M. (author)The nitrogen reduction reaction (NRR) is a promising pathway toward the decarbonization of ammonia (NH3) production. However, unless practical challenges related to the detection of NH3 are removed, confidence in published data and experimental throughput will remain low for experiments in aqueous electrolyte. In this perspective, we analyze...review 2022
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Abdinejad, M. (author), Irtem, I.E. (author), Farzi, Amirhossein (author), Sassenburg, M. (author), Subramanian, S.S. (author), Iglesias van Montfort, H.P. (author), Ripepi, D. (author), Li, Mengran (author), Middelkoop, J. (author), Seifitokaldani, Ali (author), Burdyny, T.E. (author)The electrochemical reduction of carbon dioxide (CO<sub>2</sub>) to value-added materials has received considerable attention. Both bulk transition-metal catalysts and molecular catalysts affixed to conductive noncatalytic solid supports represent a promising approach toward the electroreduction of CO<sub>2</sub>. Here, we report a combined...journal article 2022
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Ripepi, D. (author), Izelaar, B. (author), van Noordenne, D.D. (author), Jungbacker, M.P. (author), Kolen, M. (author), Karanth, P. (author), Cruz, Daniel (author), Zeller, Patrick (author), Pérez-Dieste, Virginia (author), Villar-Garcia, Ignacio J. (author), Smith, W.A. (author), Mulder, F.M. (author)Hydrogen permeable electrodes can be utilized for electrolytic ammonia synthesis from dinitrogen, water, and renewable electricity under ambient conditions, providing a promising route toward sustainable ammonia. The understanding of the interactions of adsorbing N and permeating H at the catalytic interface is a critical step toward the...journal article 2022
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Kolen, M. (author), Antoniadis, Grigorios (author), Schreuders, H. (author), Boshuizen, B. (author), van Noordenne, D.D. (author), Ripepi, D. (author), Smith, W.A. (author), Mulder, F.M. (author)The electrochemical nitrogen reduction reaction (NRR) is a promising alternative to the current greenhouse gas emission intensive process to produce ammonia (NH<sub>3</sub>) from nitrogen (N<sub>2</sub>). However, finding an electrocatalyst that promotes NRR over the competing hydrogen evolution reaction (HER) has proven to be difficult. This...journal article 2022
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Ripepi, D. (author), Zaffaroni, R. (author), Schreuders, H. (author), Boshuizen, B. (author), Mulder, F.M. (author)Direct electrochemical nitrogen reduction holds the promise of enabling the production of carbon emission-free ammonia, which is an important intermediate in the fertilizer industry and a potential green energy carrier. Here we show a strategy for ambient condition ammonia synthesis using a hydrogen permeable nickel membrane/electrode that...journal article 2021
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- Zaffaroni, R. (author), Ripepi, D. (author), Middelkoop, J. (author), Mulder, F.M. (author) journal article 2020
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Ripepi, D. (author)In this study a one-dimensional, steady-state, non-isothermal numerical model was developed in order to investigate the transport phenomena occurring in a membrane electrode assembly for fuel cell applications and to provide an insight on the effects of the hydrogen crossover. The hydrogen that permeates through the membrane is consumed without...master thesis 2017