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Reimagining river cities: The University of São Paulo, TU Delft and Resilient Delta enter 5-year partnership

This April, the University of São Paulo and TU Delft launched a 5-year joint research project on river cities and ports, focusing on the intersections between climate action and health the urban environment The Tietê river makes its start in foothills immediate east of São Paulo, flowing through this expansive metropolis through a series of waterways. Eventually these waters coalesce with the Paraná river, forming an expansive transnational river delta that enters the Atlantic Ocean near Buenos Aires, Argentina. According to Prof. Alexandre Delihaicov, the culture of design for river cities emphasizes the architecture of place, the multiple dimension of water and its civic character, where rivers serve as structuring elements in urban and regional design. Viewing the hydrographic basin as a unit for planning and intersectoral management and governance in public administration transforms the approach to infrastructure and city development. Delihaicov leads the “Laboratório de Projetos” (Design Lab) and the “Architecture Design of Fluvial Urban Infrastructures - Grupo Metrópole Fluvial” at the Faculty of Architecture and Urbansim at the University of São Paulo, which has conducted extensive research-by-design projects on several aspects of urban water, the environment, and liveability in the region. Many of the timely and complex challenges facing this vital urban water system—and its connections throughout South America—resonate with those found here in the Rhine-Meuse-Scheldt delta in Northwest Europe, which culminates in the highly urbanized Greater Rotterdam region. The scale and urgency of these challenges was underscored by historic floods in the state of Rio Grade do Sul in recent weeks. In addition to substantial loss of life, hundreds of thousands have been displaced from their homes, and large parts of cities including Porto Alegre remain underwater. Many communities may be permanently displaced by the events. According to Dr. Taneha K. Bacchin, there is an urgent need for a paradigm shift in urban and regional development, one that is more sensitive and responsive to the unfolding state of criticality, socio-environmental vulnerability, and risk. Bacchin has been invited to join multiple local, state and national crisis management and reconstruction projects in the wake of the events. As an Associate Professor of Urbanism at TU Delft, Bacchin also has extensive academic leadership experience in major research initiatives like Water4Change and Redesigning Deltas . Shared recognition of the need for action and cooperation motivates this five year joint research program, “Network of river port cities: Design at the intersection of climate action and urban-environmental health”. The cooperation focuses on the interrelations among six key areas: water, energy transition, nature-based economy, hybrid green-blue infrastructure, transport infrastructure and mobility, health and wellbeing in the built environment. The exchange will facilitate peer-to-peer learning within the larger geographic context of highly dynamic landwater regions, as Deltas, offering global perspectives and regenerative insights. The international and transdisciplinary cooperation builds on a long history of cooperation between the University of São Paulo and TU Delft , including a visit by the Rector of USP to TU Delft in February 2024. It is also the first joint collaboration to also include as partner the Resilient Delta Initiative. “By expanding this relationship to include Erasmus University Rotterdam and other key stakeholders through the Resilient Delta initiative, we can tap new opportunities to speed up our learning, innovation, and intervention,” says Arjan van Timmeren, Scientific Director of RDi. “This program brings fantastic opportunites to strengthen how our universities work together and with key stakeholders in our home cities and regions.” The program connects researchers and practitioners around five research domains and twinned real-world cases. Innovations in water-based mobility, solutions for safe living in climate-vulnerable areas, and strategies for weaving ecological awarness into everyday urban life are among the focuses of the program. The contours of the partnership were sketched out over the course of a three-day seminar in São Paulo in April 2024. This included reflections on current and ongoing transdisciplinary research programs in Brazil and the Netherlands. More than fifty delegates participated in joint presentations hosted by the Municipality of São Paulo, which aims to feed a new Waterway Plan for São Paulo through research-by-design projects. Pedro Martin Fernandes, President of São Paulo Urbanismo, underscored the city’s aspirations for its water infrastructure: “We need to change the city’s relationship with water. Through the transformation and creation of public spaces, we want to change people’s view of this resource.” Resilient Delta will help to resource and co-design the cooperation process, leveraging insights from a growing team of ‘gluon’ knowledge integration experts and insights from ongoing urban and regional collaborations like the Maasterras redevelopment . “This will be particular important for securing successful joint working across science and practice, but also within and between our two urban regions,” says Zac Taylor, Academic Lead for Deltas at RDi. “The complexity and urgency of the assignment before us demands novel approaches to creating knowledge for action. With these creative approaches, we can and must learn to speed up our learning and action between science and practice, and between our two regions.”

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Bipolar membranes for intrinsically stable and scalable CO2 electrolysis

The energy transition requires technology to supply sustainable carbon-based chemicals for hard-to-abate sectors such as long-distance transport and plastic manufacturing. These necessary hydrocarbon chemicals and fuels, responsible for 10-20% of the global greenhouse gas emissions, can be produced sustainably by the electrolysis of captured CO 2 using renewable electricity. Currently, the state-of-the-art CO 2 electrolyzers employ anion exchange membranes (AEMs) to facilitate the transport of hydroxide ions from the cathode to the anode. However, CO 2 is crossing the membrane as well, resulting in a loss of reactant and unfavourable anode conditions which necessitates the use of scarce anode materials. Bipolar membranes (BPMs) offer an alternative that addresses the problem of CO 2 crossover but still requires research to match the product selectivity of AEM-based systems. Our perspective, a collaboration between groups of David Vermaas, Tom Burdyny and Marc Koper, published in Nature Energy, assesses the potential of BPMs for CO 2 electrolysis by looking at CO 2 utilization, energy consumption, and strategies to improve the product selectivity. Abstract CO 2 electrolysis allows the sustainable production of carbon-based fuels and chemicals. However, state-of-the-art CO 2 electrolysers employing anion exchange membranes (AEMs) suffer from (bi)carbonate crossover, causing low CO 2 utilization and limiting anode choices to those based on precious metals. Here we argue that bipolar membranes (BPMs) could become the primary option for intrinsically stable and efficient CO 2 electrolysis without the use of scarce metals. Although both reverse- and forward-bias BPMs can inhibit CO 2 crossover, forward-bias BPMs fail to solve the rare-earth metals requirement at the anode. Unfortunately, reverse-bias BPM systems presently exhibit comparatively lower Faradaic efficiencies and higher cell voltages than AEM-based systems. We argue that these performance challenges can be overcome by focusing research on optimizing the catalyst, reaction microenvironment and alkali cation availability. Furthermore, BPMs can be improved by using thinner layers and a suitable water dissociation catalyst, thus alleviating core remaining challenges in CO 2 electrolysis to bring this technology to the industrial scale. Go to the publication Kostadin Petrov Christel Koopman David Vermaas Tom Burdyny Siddharta Subramanian

Understanding the learning process: machine learning and computational chemistry for hydrogenation

Machine learning is being mentioned all around, but can it be applied to modelling homogeneous catalysis? Researchers from TU Delft together with Janssen Pharmaceuticals published an extensive study accompanied by one of the biggest datasets on rhodium-catalyzed hydrogenation in Chemical Science trying to answer this question. Adarsh Kalikadien Evgeny Pidko For more than half a century, Rhodium-based catalysts have been used to produce chiral molecules via the asymmetric hydrogenation of prochiral olefins. The importance of this transformation was acknowledged by a Nobel prize given to Noyori and Knowles for their contributions in this field. Nowadays, asymmetric hydrogenation catalysts are widely used in the pharmaceutical industry, numerous chiral ligands are available to tackle a wide range of prochiral substrates and the reaction mechanism has been extensively studied. Consequently, one would expect that finding the best catalyst for the asymmetric hydrogenation of a new substrate is a trivial task. Unfortunately, this is not the case and a tedious and costly experimental screening is still needed. Adarsh Kalikadien and Evgeny Pidko from TU Delft together with experts in high-throughput-experimentation, data science and computational chemistry from Janssen Pharmaceutica in Belgium decided to investigate whether a well-trained machine could do the job. To their surprise, the machine was actually not able to learn as much as they expected. The idea was to set up a simple model reaction with a well-known rhodium catalyst. Based on the experimental data generated by the high-throughput experimentation team of Janssen, a computational dataset was built to which multiple machine learning models were applied. “We digitalized the 192 catalyst structures and represented them with features of various levels of complexity for the machine learning models,” says Kalikadien, a PhD student in Pidko’s group. "The interesting thing was that all the simpler models, including the random model, showed similar performances as the expensive variant, which intrigued us. It turned out to be an early indication that the machine was not really learning anything useful.” "One of our conclusions was, when tested more extensively, that for an out-of-domain modeling approach, it doesn't matter what representation you put in”. Nevertheless, although the team was not able to build an accurate model, their study was worth publishing. The publication process went relatively smoothly. “Although the first journal we contacted rejected our submission as too specialized, the high-impact journal Chemical Science saw the value of this work. Not many researchers are interested in just seeing the R2 value of a model and then having no possibility to use it, they are probably interested in an in-depth analysis like ours. So we were able to submit our data, code and even interactive figures there for everyone to use.” At the moment there is a big incentive for publishing negative data in order to help the community to assess the true added value of machine learning, since models trained on mainly positive results tend to become very biased. "We made everything open source," says Kalikadien. "Not only is all the data accessible, but we also offer the code including packages and instructions, so that anyone who is interested can do the same type of research." In this way, they have published one of the largest datasets of a certain type of hydrogenation reaction. What's next? "Our representation of the catalyst wasn't as meaningful for the machine learning models as we had hoped, so we are now looking for a representation that may be less simplified but still as simple as possible," says Kalikadien. "Creating a digital representation of your catalyst should not cost way more money than running the actual experiment, so we are trying to incorporate more information from the reaction mechanism into the model without making it too extensive. A more dynamic and hopefully more informative version of the representation." Read the publication Adarsh Kalikadien, Cecile Valsecchi, Robbert van Putten, Tor Maes, Mikko Muuronen, Natalia Dyubankova, Laurent Lefort and Evgeny A. Pidko

Start jij dit jaar je studie in Delft? ‘Discover your X’ tijdens de OWee en IP!

Wat tof, jij gaat aan de TU Delft studeren! Dan neem je vast ook deel aan de OWee of IP. Tijdens deze week ontdek je alles over de TU Delft, Delft zelf én natuurlijk wat er te doen is buiten je studie. Wil jij in Delft sporten? Jezelf creatief uiten? Helemaal ontspannen? Nieuwe mensen ontmoeten? Of af en toe een te gek evenement bijwonen? We zien jou graag tijdens de infomarkt én natuurlijk de Activity Market bij X! Op maandag 19 augustus staan we op de infomarkt in Delft. Hopelijk kunnen we daar alvast kennismaken! Avondprogramma Vanaf zondag 18 augustus t/m donderdag 22 augustus kun je alvast kennismaken met X door de evenementen uit ons rustige avondprogramma te bezoeken. Klik hier voor de agenda. Activity Market | 21 augustus Op woensdag 21 augustus vindt bij X de Activity Market plaats voor alle nieuwe en eerstejaars studenten. Je maakt hier kennis met de faciliteiten van X, de sport- & en cultuurverenigingen en alles wat X te bieden heeft op het gebied van sport, cultuur, kunst, lifestyle, games en eten en drinken. Volg ons alvast op Instagram voor een eerste sneak peek van X en de Activity Market! *Er worden foto's gemaakt op de Activity Market. Meer info over ons fotografiebeleid bij X vind je in de algemene voorwaarden. Beschikbaarheid X voor huidige X-leden X-leden kunnen nog steeds meedoen met het beschikbare aanbod, maar houd rekening met extra drukte. Zo kunnen de nieuwe studenten dit jaar ook een kijkje nemen in de Fitness op de Activity market tussen 11:00 en 15:00. Check de beschikbare lessen en waar ze komende week plaatsvinden in het rooster.

Opening van het academisch jaar 2024-2025 op 2 september

Vier met ons de opening van het academisch jaar! Je bent van harte uitgenodigd om op maandag 2 september aanwezig te zijn bij de opening van het Academisch Jaar 2024-2025 van de TU Delft. Met het thema 'Engineering the Future' kijken we dit jaar naar de bouwstenen van onze duurzame toekomst. Mobiliteit, voedselvoorziening, gezondheidszorg, energievoorziening en de manier waarop we grondstoffen gebruiken: ze zullen allemaal drastisch veranderen in deze eeuw. Aan de TU Delft kunnen we deze transities helpen vormgeven. Wat we hier doen kan invloed hebben op hoe bedrijven en eindgebruikers zich gedragen. Neem onze smartphones, waarvan het meeste goud en lithium na een paar jaar nog steeds op de vuilnisbelt belandt. Als je ze vanaf het begin anders ontwerpt, kun je uiteindelijk 'nul afval' bereiken - en dit is slechts één voorbeeld. Michiel Langezaal, alumnus en CEO van FastNed, het bedrijf dat een netwerk van snellaadpunten bouwt langs de snelwegen van Europa, is te gast. We praten met Dream Team Epoch, dat AI wil gebruiken om bij te dragen aan de Sustainable Development Goals van de Verenigde Naties. We verwelkomen ook Irek Roslon, alumnus en oprichter van SoundCell, de startup die een screening ontwikkelt waarmee artsen razendsnel de juiste antibiotica voor patiënten kunnen kiezen. Zij zullen het hebben over hun weg naar de toekomst, de bouwstenen die ze nodig hebben en de obstakels waar ze tegenaan lopen. Hoe ze hun eigen en onze toekomst vormgeven en met wie ze samenwerken. Muziek en dans maken ook deel uit van deze feestelijke bijeenkomst. En aan het eind heffen we met z'n allen het glas op het nieuwe academische jaar! Klik hier om je aan te melden.