DATE: Sunday, October 24, 2021
TIME: 12:00 PM - 01:00 PM
LOCATION:KAUST, VIA ZOOM, CLICK OR COPY THE LINK BELOW
Please click the link below to join the webinar:
Abstract: The production of hydrogen by water electrolysis suffers from the kinetic barriers in the oxygen evolution reaction (OER) that limits the overall efficiency. As spin-dependent kinetics exist in OER, the spin alignment in active OER catalysts is critical for reducing the kinetic barriers in OER. However, most active OER catalysts go for surface reconstruction to oxyhydroxides that have dynamic open-shell orbital configurations with disordered magnetic moments, without showing an apparent long-range interatomic ferromagnetism; thus, controlling the spin alignment of these active catalysts is challenging. In this presentation, I will introduce our recent progress in finding the spin pinning effect to make the spins in active oxyhydroxides more aligned for higher intrinsic OER activity. The spin pinning effect is found at the interface of oxideFM/oxyhydroxide. The spin pinning effect can promote spin selective electron transfer on OER intermediates to generate oxygens with parallel spin alignment, which facilitates the production of triplet oxygen and increases the intrinsic activity of oxyhydroxide by ~ 1 order of magnitude. Under spin pinning, the spins in oxyhydroxide can become more aligned after magnetization as long-range ferromagnetic ordering is established on the magnetic domains in oxideFM. The spin polarization process in OER under spin pinning is also believed to be sensitive to the existence of active oxygen ligand (O(-)) in oxyhydroxide. When the O(-) is created in 1st deprotonation step under high pH, the spin polarization of ligand oxygens will be acilitated, which reduces the barrier for subsequent O-O coupling and promotes the O2 turnover.
BiographyZhichuan is a professor in the School of Materials Science and Engineering, Nanyang Technological University. He received his PhD degree in Electroanalytical Chemistry and B.S. degree in Chemistry from Lanzhou University, China. His PhD training was received in Lanzhou University, Institute of Physics, CAS, and Brown University. Since 2007, he worked in State University of New York at Binghamton as a Research Associate and from 2009 he worked in Massachusetts Institute of Technology as a Postdoctoral Researcher. Dr. Xu has received several awards such as Chun-Tsung Endowment Outstanding Contribution Award - Excellent Scholar at 2018 and the Zhaowu Tian Prize for Energy Electrochemistry by International Society of Electrochemistry (ISE) in 2019. He was awarded Fellow of Royal Society of Chemistry (FRSC) on Nov. 2017. He served as the president of ECS Singapore Section. Dr. Xu is a Highly Cited Researcher by Clarivate Analytics, Web of Science (2018, 2019, and 2020).
DATE: Monday, October 25, 2021
Control of thermal transport is of significant interest for a wide range of applications, such as thermoregulation of individuals, buildings, vehicles and batteries, thermo-electric and solar-thermal energy conversion, bio/chemical sensing, and micro/nanomanufacturing. However, heat transfer processes are often difficult to actively control: heat conduction is usually diffusive in nature owing to the incoherence of heat carriers (phonons and electrons) and thermal radiation is generally broadband or have wide energy distribution. If one could engineer the transport of thermal energy, arguably the most ubiquitous form of energy, with similar degree of controllability as optical energy, a variety of energy transport and conversion technologies can be improved. In this talk, I will introduce a thermo-photonic engineering approach to manipulate nanoscale heat transport by using surface phonon polaritons (SPhP). I will mainly focus on how the SPhP can be utilized to tailor thermal radiation properties, especially to achieve a coherent, near-monochromatic far-field thermal emission, which is a big departure from the incandescent behaviour in the classic textbook as described by the Planck's law.
Dr. Shin is an Assistant Professor in the Department of Mechanical Engineering at National University of Singapore (NUS). Prior to joining NUS, she received her Ph.D. in Materials Science and Engineering from UC San Diego in 2019. She specializes in experimental investigation of fundamental nanoscale heat transport for thermal management and development of personalized thermoregulators and energy harvesting devices using thermoelectric energy conversion. In particular, she is interested in solving multidisciplinary problems, such as thermo-electric and thermo-optical engineering for controlled thermal management. She was a selected participant in 'Asian Deans' Forum 2018 The Rising Stars Women in Engineering Workshop' and a recipient of 2020 Chancellor's Dissertation Medal at UC San Diego.
Registration link to join the seminar:
Please click this link to join the webinar:
Abstract: Recently, new opportunities to deploy metal organic frameworks in membrane separation and devices have rapidly emerged. Overcoming some of the challenges of synthesizing thin, coherent films as well as integration with polymeric substrates have meant that the unique properties of MOFs can now be exploited in form factors which are viable for potential industrial applications as well as a platform to control enzymatic reactions. The high compatibility of nanosize MOF particles in polymer matrix allows fabrication of ultrathin mixed matrix coatings on porous supports which provide mechanical stability. Applications range from enhancing gas separation with functionalized UiO-66 to pervaporation desalination where defect engineered MOFs can enhance water transport for dewatering of high salinity brines.
We also explored several approaches in facilitating pure MOF film formation on polymeric membrane substrates. First, functionalization of polymer substrates with sol-gel coatings allows more facile attachment of ligands to promote MOF nucleation as well as providing a rigid exo-skeleton for thin MOF layers to grow. This has resulted in submicron ZIF-8 films to be readily grown for gas separation applications. Another approach is to use bioinspired polydopamine/polyethylenimine (PDA-PEI) coatings which can also nucleate thin ZIF-8 films. The ease of MOF deposition with the PDA-PEI approach in itself opens up new opportunities in spatial patterning MOFs on surfaces to exploit both the optical properties of thin MOF films as well as biomedical devices with spatially imprinted MOF-enzyme complexes for sensing.
Biblioagraphy: Vicki Chen is the Executive Dean of the Faculty of Engineering, Architecture and Information Technology at The University of Queensland. The faculty has over 7,000 undergraduate and postgraduate students enrolled in its programs and an extensive research portfolio and engagement with industry. She is a graduate from the Massachusetts Institute of Technology with a Bachelor of Science in Chemical Engineering and from the University of Minnesota with a Ph.D. in Chemical Engineering. Prior to joining the University of Queensland, she was the head of the School of Chemical Engineering at the University of New South Wales (UNSW). At UNSW, she was the director of the UNESCO Centre for Membrane Science and Technology (2006 – 2014). Her research interests span water/wastewater treatment, gas separation, nanomaterials, and membrane manufacturing. She has published over 192 journal papers and 12 book chapters. She also led multi-institutional projects, including a collaboration with the European Union Framework programme in advanced desalination. She was the 2017 Barrer Centre Distinguished Lecturer at Imperial College and council member of the Aseanian Membrane Society (2007 – 2014). Her research sponsors ranged from government to SMEs and multinational industrial partners and include the Australian Research Council, Australian Low Emission Coal R&D, Coal Innovation New South Wales (CINSW), Simplot, Beijing OriginWater, Printed Energy, Dairy Innovation Australia, Bluescope Steel, Sydney Water, BASF, the Cooperative Research Centre (CRC) for Polymer, and the Cooperative Research Centre for Greenhouse Gases Technologies (CO2CRC).
DATE: Tuesday, October 26, 2021
TIME: 03:00 PM - 05:00 PM
LOCATION:Zoom link: https://kaust.zoom.us/j/97352129718
Zoom link: https://kaust.zoom.us/j/97352129718
ABSTRACT: The demand for renewable energy resources has become increasingly urgent due to global warming and related environmental issues. Renewable energy systems require an energy storage solution because they are intermittent in nature. Among various alternatives, rechargeable aqueous zinc ion batteries (RAZIBs) with merits of cost-effectiveness, high safety, and environment-friendliness attracted great promise for grid-scale energy storage. Inspired by these merits, great efforts have been devoted to designing and fabricating Zn-based energy storage devices. However, the suitable cathode materials for RAZIBs and the details of the Zn2+ storage mechanism and have not been fully understood. Several methods have been proposed to tackle the issues for both at the cathode and anode side of the ZIB in this dissertation, including cathode structure engineering, interlayer strategy, and zinc anode protection.
DATE: Wednesday, October 27, 2021
TIME: 04:30 PM - 05:30 PM
LOCATION:KAUST, WEBINAR VIA ZOOM
ZOOM WEBINAR PRESENTATION
Check your email for the Zoom registration link. Join the webinar using your full name in order to register your attendance.Abstract: The increasing reliance of renewable energy sources such as wind and solar is a key component in the energy transition to a net-zero, carbon-free economy. Supplanting traditionally reliable energy sources such as coal, oil-and-gas, and nuclear with distributed renewable systems creates uncertainty the security of energy supply and deliverability on which the Nation depends. Underground energy storage can help to mitigate this issue through the use of gas storage in geologic traps and engineered salt caverns. Economically and socially critical gases already in underground storage include natural gas, CO2, compressed air, natural-gas liquids such as propane and ethane, and, increasingly hydrogen, along with crude oil in the US Strategic Petroleum Reserve. Maintaining storage containment and mitigating migration of energy-related products out of the storage zone into groundwater systems, the ground surface, or the atmosphere requires both increased technical understanding and increased public awareness of the benefits and safety of underground storage systems.In this presentation we provide an overview of the drivers for underground storage of natural gas, hydrocarbons, carbon dioxide, hydrogen, thermal energy, compressed energy, and nuclear waste in the subsurface and explore opportunities for improved characterization, lab testing, monitoring, risk analysis, and identification of key learnings and future opportunities.Biography: A geomechanicist by training, Richard A. Schultz works to advance underground energy storage and the energy transition toward a low-carbon energy future. Currently the owner of Orion Geomechanics LLC of Cypress, Texas, he was Senior Research Scientist at The University of Texas at Austin, Principal Geomechanicist with ConocoPhillips, and Foundation Professor of Geological Engineering and Geomechanics with the University of Nevada, Reno. He has published more than 115 research papers, 5 edited volumes, 15 chapters in books or edited volumes, and delivered more than 350 presentations to academia and industry worldwide including 94 invited; his book Geologic Fracture Mechanics was published by Cambridge University Press. Dr. Schultz is a member of the Interstate Oil and Gas Compact Commission (IOGCC), the National Association of Corporate Directors (NACD), the nonprofit resource BoardSource, a Fellow of the Geological Society of America, and a licensed Professional Geologist in the State of Texas. He serves on ARMA's Board of Directors, is the Founding Chair of its Technical Committee on Underground Storage and Utilization and its Distinguished Service Award Committee.www.raschultzunr.net
DATE: Thursday, October 28, 2021
TIME: 12:00 AM - 11:00 PM
Link to join Webinarhttps://kaust.zoom.us/j/91860868841
ABSTRACT: The nanopore sensor, consisting of an individual pore with diameter of few nanometers, can detect the shape and the structure of many individual biopolymers. Combining single-molecule detection with a high-throughput, it allows us to explore rare structures in biopolymers, sometimes with atomic precision. The nanopores have been employed for DNA sequencing, protein fingerprinting, and virus detection. We employed a new nanopore-based technique to precisely analyse the knotting of long DNA chains in equilibrium, and to explore the dynamics of knots in single digit nanopores. We showed that DNA becomes malleable in nanoscale constrictions at short timescales, and capable of sharp buckling beyond the limit of the standard polymer model. By precisely quantifying the DNA knotting probability – which is a very sensitive measure of the inter-DNA interactions – we observed onset of inter-DNA attraction moderated by monovalent ions at high concentration. Strong DNA attraction has been observed in the past for multivalent ions, but never for monovalent ions due to a lack of instrumental techniques that could quantify moderate interactions. Our results are relevant not only for the understanding of DNA packing and manipulation in living cells, but also for the development of nanopore-based sequencing technologies. As we strive to employ synthetic biological machinery in different environments, unshackled from physiology, understanding inter-DNA interaction at high molarity becomes even more so biotechnologically important.
BIOGRAPHY: Slaven Garaj's research is focused on curious nanoscale phenomena at the interfaces between soft and hard matter, with particular interest in nanopores single-molecule sensors, nano-fluidics and nano-electronics. His research has been features in top journals such as Nature, Science, Nature sister journals, and PNAS, and received a keen attention in the media. While pursuing in-depth scientific understanding, his research group drives the development of technologies in the fields of medical diagnostics, water filtration and energy harvesting. His patents are licensed by biotech companies, and he is a founder of cleantech start-up company ReActo, focused on removing persistent contaminants from water.Prof. Slaven Garaj joined National University of Singapore in 2012 as faculty member in the Departments of Physics and Biomedical Engineering, and has been awarded NRF Fellowship. Previously, he worked as a research scientist at Harvard University, where he pioneered work on 2D nanopores for DNA sequencing. He conducted his PhD thesis at the Swiss Federal Institute of Technology in Lausanne (EPFL), Switzerland in the field of condensed-matter physics.
DATE: Monday, November 01, 2021
In today's fast-paced, constantly changing world, innovation plays a vital role in creating an impact on environmental technical, economical and societal fronts. Cultivating innovation as a systematic method in our formal education is expected to improve innovation culture and entrepreneurial behavior. TRIZ, a Russian acronym, which translates as "Theory of Inventive Problem Solving" developed by Genrich Altshuller in 1964 aids individuals and organizations to develop this systematic innovation culture. TRIZ is an efficient technique that provides tools and methods that allows solving challenging problems very systematically, as opposed to normal trial and error. Although TRIZ was originally developed to solve inventive problems in engineering, it has been extended to numerous fields such as education, business, agriculture, transportation, health, etc. Fundamentally TRIZ is based on 40 inventive principles and eliminating engineering and physical contradictions. Many organizations such as Apple, BMW, GE, GM, Mahindra, NASA, P&G, Siemens, Samsung, Schneider Electric, and many more. Recently, TRIZ has been introduced as a part of basic education in France and Japan
Through this talk, the author provides a brief overview of TRIZ with some examples to inspire young engineers and researchers, so that they can consider TRIZ to solve challenging research problems.
Dr. Sreenivasa Rao Gubba is a Research Scientist at KAUST Innovation and Clean Combustion Research Center (CCRC). Dr. Gubba has 17 years of professional experience comprising of 9 years at General Electric Global Research Center (GRC) in Bangalore and 8 years at academic institutions in the UK and India. He is a level 3 TRIZ practitioner. He trained many engineers on TRIZ methodology at GE. Dr. Gubba used TRIZ to solve many real-world problems during his tenure at GE. Few technologies to mention are Boiler tube health monitoring (BTHM), an IOT based solution for addressing boiler tube health, the ducted fuel injector (DFI), a technology that is capable of reducing soot greater than 50% in large bore IC engines and late lean injectors (LLI), a technology used in current GE power gas turbines for low NOx and higher T39. His current research interests are low emission combustion technologies, alternative fuels, and gasification.
Registration link to join the webinar:
DATE: Wednesday, November 03, 2021
Check your email for the Zoom registration link. Join the webinar using your full name in order to register your attendance.Abstract: Geological storage of CO2 in saline aquifers is a desirable measure to slow down and mitigate the trend of global warming, in terms of storage potential, cost and permanency. This talk introduces our systematic experimental and numerical simulation approaches to investigate the CO2 plume migration, trapping mechanisms and storage security. The effects of methane impurities, topography, reservoir architecture and mineralogy on the CO2 plume migration and trapping have been investigated. The results are of great significance on the predictions of short-term plume migration and long-term reservoir quality evolution and storage mechanisms, as well as on the storage site selections. Biography: Peng Lu is currently a Geological Specialist at EXPEC Advanced Research Center, Saudi Aramco and the Leader of Geology Technology Team of Beijing Research Center, Aramco Asia. He received his Ph.D. degree in geochemistry from Indiana University, U.S.A. His research focuses on integrating field observations, experimental and numerical modeling approaches to investigate the underlying processes and mechanisms of gas-water-rock-interactions, which are pertinent to many urgent energy and environmental problems, such as reservoir quality prediction of petroleum reservoirs, geological carbon storage, toxic metal contaminations and water quality. He led the development of carbonate and clastic diagenesis modeling software (CarbGen and ClastGen) and a toolbox to seamless couple forward depositional modeling with diagenetic modeling. He received the 2021 Kharaka Award from International Association of GeoChemistry (IAGC), EXPEC Advanced Research Center Awards in 2019 - 2021 and AAPG ACE 2017 Top Presentations Award. He was a finalist for Best Exploration Technology Award – World Oil Awards in 2017. Dr. Lu has more than 40 referred journal publications with a total citation of 1500+ and an H-index of 19, according to Google Scholar. He holds 8 U.S. patents and has additional 12 U.S. patent applications.
DATE: Thursday, November 04, 2021
TIME: 05:00 PM - 06:00 PM
LOCATION:Auditorium between Building 4 & 5
In the early 21st century, oil and gas production in the U.S. was conjectured to be in terminal-irreversible decline. But, thanks to the advancement of hydraulic fracturing technologies over the last decade, operators are now able to produce two-thirds of U.S. oil and gas output from almost impermeable shale formations. Despite the enormous success of the 'shale revolution', there are still debates about how long shale production will last and if there will be enough to subsidize a meaningful transition to 'greener' power sources. Most official pronouncements of shale oil and gas reserves are based on purely empirical curve-fitting approaches or geological volumetric calculations that tend to largely overestimate the actual reserves. As an alternative to these industry-standard forecasting methods, we propose a more reliable, 'transparent', physics-guided and data-driven approach to estimating future production rates of oil and gas in shales. Our physics-based scaling method captures all essential physics of hydrocarbon production and hydrofracture geometry, yet it is as simple as the industry-favored Decline Curve Analysis (DCA), so that most engineers can adopt it. We also demonstrate that our method is as accurate as other analytical methods and has the same predictive power as commercial reservoir simulators but with less data required and significantly faster computational time. To capture the uncertainties of play-wide production, we combine physical scaling with the Generalized Extreme Value (GEV) statistics. So far, we have implemented this method to nearly half a million wells from all major U.S. shale plays. Since the results of our analyses are not subject to bias, policy-makers ought not to assume that the shale production boom will last for centuries.
DATE: Monday, November 08, 2021
The field of CO2 electrolysis continues to mature and now encompasses a wide variety of disciplines bordering engineering and science. The majority of research, however, still emphasizes the 1D dimensional region between the cathode and the anode, and subsequently the development and interactions of all components contained within (gas-diffusion layer, membrane, etc.). As the trajectory of research marches towards higher current density operation (>200 mA/cm2) and larger geometric cell areas (>5 cm2), the homogeneity of reactions occurring across the catalyst's planar area now warrants additional attention from the research field. In brief, under new standard operating conditions it can no longer be assumed that activity is constant at each location on a catalyst's surface. Specifically, variations in CO2 and product concentrations, applied potential and temperature will inevitably occur throughout a device, and influence a catalyst's localized current densities and product selectivity.
In this talk, several examples of spatial variations in CO2 electrolysis systems at elevated current densities in a gas-diffusion layer system will be addressed, as will their impact on the measured performance. Shown examples are spatial variations in selectivity, the importance of proper current collection, and the direct measurement of localized electrochemical activity using a newly-developed 'thermal potentiostat' which couples infrared imaging with potentiostatic data.
Thomas (Tom) Burdyny completed his PhD from the University of Toronto (2017) followed by a brief postdoc at the Delft University of Technology. In 2019 he began his independent career at TU Delft, where his group focuses on applied and process integration aspects of electrochemical technologies, namely CO2 reduction. The lab's work takes a combined modelling and experimental approach to understand and improve all components and phenomena in the electrochemical system. Tom has been the recipient of the prestigious VENI personal grant (2019) from the Dutch government , as well as acting as the ethylene work package leader in the Horizon 2020 EU project SELECTCO2.
DATE: Thursday, November 11, 2021