Julian Renpenning’s Post

I am pleased to share that our latest research article has been published in the Applied Catalysis B: Environment and Energy Journal. The paper titled "Electrosynthesis of formate coupled green hydrogen production on the interface of CuMoO4 nanostructures: A novel electrocatalyst for hybrid water electrolysis system" is now available online at https://lnkd.in/ggMkQJdf It was published recently and covers material properties in terms of electron transfer, work function, DFT studies, and final application for hybrid water electrolyzers. If you're interested in water electrolysis systems, I highly recommend checking it out. #ReadingRecommendation #MustRead

🔬 Exciting new research sheds light on Thermally Activated Electrolytes (TAEs) in slit channels. Our latest study delves into the intricate thermoelectric response of these electrolytes, revealing competing mechanisms driving charge transport through temperature gradients. With a focus on understanding the activation energy governing charge carriers, the research uncovers a remarkable giant thermoelectric response. This discovery holds promise for explaining recent experimental results in nanoporous media infiltrated with TAEs. Stay tuned for insights into the fascinating world of thermoelectrics! 🧪⚡️ Authors: Rajkumar Sarma and Steffen Hardt Partner university: Technische Universität Darmstadt #Research #Thermoelectrics #Electrochemistry #wasteheatrecovery #wasteheat #greenenergy #TRANSLATEenergy

📄Paper Alert! 📄 I'm thrilled to announce that the first research paper of my PhD on the development of a “3-Electrode Setup for the Operando Detection of Side Reactions in Li-Ion Batteries: The Quantification of Released Lattice Oxygen and Transition Metal Ions from NCA“ has just been published in the Journal of the ECS - The Electrochemical Society! 🕺🧑🔬 🧪 🔬   🔬 You want to detect and #quantify the loss of lattice #oxygen and the #dissolution of transition metal ions from #cathode active materials but don’t have access to complex and expensive devices such as a on-line electrochemical mass spectrometer or a #synchrotron?   🎯 We’ve got you!   Within this study my colleague, and first shared author, Lennart Reuter and me developed an easy-to-adapt 3-electrode #Lithium-Ion #battery cell setup employing an internal sensing electrode (SE).   ✅ Holding the SE at an adequate constant potential enables the detection of reductive currents, similar to the ring currents known from a rotating-ring-disc-electrode (RRDE).   ✅ Through knowledge of the underlying processes and their number of electrons required per reduced species, the reductive currents can be accurately #quantified - as verified by comparison with OEMS experiments! 🎯   ➡️ Read the open access article here:   https://lnkd.in/dhEskuZF 🔍The key highlights of this study comprise:   ·        Investigation of structural stability limit of NCA. ·        Cheap analysis method for precise quantification of evolved O2 and dissolved TMII+. ·        Development of 3-electrode cell with LFP CE, NCA WE, and carbon sense electrode. ·        2.3 e−/ O2 reduction mechanism in carbonate-based electrolyte at sense electrode. Our thanks go to Technische Universität München, the Bundesministerium für Bildung und Forschung, and the Bundesministerium für Wirtschaft und Klimaschutz for the financial support of this work.

✨📑Our latest article, published in 'ACS Energy Letters' (ACS Publications), focuses on the #synthesis and #photoluminescence enhancement of ternary II-III₂-VI₄ colloidal #nanocrystals. These materials open up exciting possibilities for advanced #semiconductor technologies, pushing the boundaries of #sustainability and performance. 🔗 Read the #fullarticle and discover how this work is contributing to the #future of #energy-efficient solutions: https://lnkd.in/d7Rn5iVm 📚 This study is an example of #interdisciplinary collaboration among the partners of the CONFETI Project EU, with contributions from Iowa State University and Universitat Autònoma de Barcelona. #GreenChemistry #CO2Valorization #NitrogenValorization #chemistry

How do chemical reactions unfold in extreme environments? I am extremely excited to share that we addressed this question for catalytic reactions with nanoscale materials. In the work that just appeared in #JACS, we explored how strong local electric fields, generated by light-manipulated nanoparticles like silica, can induce catalytic reactions without the heat and energy losses seen in traditional noble-metal systems. The work, conducted by Thomas Linker, postdoc between the Stanford PULSE Institute at SLAC National Accelerator Laboratory and the University of Wisconsin-Madison, and a team of collaborators, uncovers new pathways, such as the formation of trihydrogen cations, offering insights into water splitting and catalysis in extreme field conditions. Our multiscale simulations pave the way for understanding the dynamics of molecular fragmentation at the nanoscale in ultrafast, strong-field environments. We find that charge localization emerges as the limiting step for initiating bond fragmentation, with ∼100 fs for water splitting on wet silica surfaces. The findings not only deepen our understanding of catalytic activity in strong electric fields but also have broader implications for biological and astronomical chemistry, where similar electrostatic forces drive complex reactions. The results motivate to delve deeper into this emerging field of strong-field nanocatalysis exploiting next-generation X-ray free electron laser light sources to experimentally validate the theoretical predictions. Stay tuned! We acknowledge support of this work by the U.S. Department of Energy Office of Science. #nanotechnology #photocatalysis #electricfields #xrayscience

Water content estimation in polymer electrolyte fuel cells using synchronous electrochemical impedance spectroscopy and neutron imaging #CellReportsPhysicalScience https://hubs.li/Q02R87RB0

I am thrilled to share that our latest research has been published in the Journal of Energy Storage! 📑🔋 I am incredibly proud of the work we conducted and what we achieved. In this study, we utilized innovative techniques for electrode fabrication (magneto-electrophoretic deposition). Additionally, we introduced novel energy storage concepts through external stimuli forces (Magnetic field) to enhance the specific capacity and commercial feasibility of energy storage devices. These findings demonstrate that using the M-EPD method, the magnetic nanocomposite is uniformly supported on ferromagnetic nickel foam (NF) and shows an impressive specific capacitance. In addition, enhancing pseudo-capacitive behavior illustrated the impact of external magnetic fields on supercapacitor performance. Our work highlights that magneto-electrophoretic deposition (M-EPD) is a robust binder-free strategy. An external magnetic field facilitates ionic and electronic pathways, reduces cell polarization, and lowers internal resistance by thinning the Nernst layer. It also enhances the MHD effect on electrolyte ions and increases the diffusion coefficient. I am expressing my sincere gratitude to Dr. Kheibar Dashtian, Dr. Eskandar Kolvari, and Dr. Nadiya Koukabi for their valuable support and insightful feedback throughout this journey. I invite you all to read our paper and explore the detailed results and implications of our study. Read the full paper here: [https://lnkd.in/d6HjWbNJ] #Battery_Technology; #Electrochemistry; #Material_Science; #Magnetic_field_induced_supercapacitors; #Capacitive; #Ion_diffusion; #Asymmetric_pseudo_supercapacitors; #Innovation; #Magnetic_metal_organic_frameworks;

Another interesting read by Reid Dressler and jeff dahn from Dalhousie University : "Investigation of The Failure Mechanisms of Li-Ion Pouch Cells with Si/Graphite Composite Negative Electrodes and Single Wall Carbon Nanotube Conducting Additive". https://lnkd.in/dcCEvQ5W ".. In this work we explore the benefits of CMC/SBR binder used in conjunction with single walled carbon nanotubes. These nanotubes are thought to be effective in increasing mechanical strength of the electrodes and increase the electrical connectivity between particles within the formed electrode. When the Si/graphite electrode cycles, it is believed that the SWCNTs help keep the active particles electrically connected and, hence, electrochemically active. The pouch cells studied here are shown to exhibit minimal loss of active mass in the negative electrode but experience capacity loss due to continued negative electrode SEI growth leading to lithium inventory or shift loss." #batteries #lithiumionbatteries #siliconanode #science #nanotechnology #OCSiAl #SWCNT #EV #graphene

🔬 Pioneering research in the #AirportRegionBB: precise mechanism of the Simons process decoded! 🌟 New findings improve electrochemical process. Researchers at Bundesanstalt für Materialforschung und -prüfung BAM and Freie Universität Berlin have elucidated the exact workings of the Simons process, revolutionizing fluorinated organic compound synthesis. 🧪Discoveries using #BESSYII synchrotron enable precise in-situ measurements, revealing crucial high-valent nickel ions. 🔋What the advantages are and where it is used, you can read here: 👉 https://lnkd.in/ebSyN3YH #Research #Innovation #Electrochemistry

In a novel study, researchers at the University of Twente have made significant strides in understanding the behaviour of micro- and #nanobubbles on #electrodes during water #electrolysis, a process crucial for #greenhydrogen production. These tiny bubbles form on the electrodes, blocking the flow of #electricity and reducing the #efficiency of the reaction.   Supported by advanced molecular simulations, Detlef Lohse and his team have developed a theory that can successfully predict the electrical current density needed to allow the nanobubbles to grow uncontrollably and detach, thus freeing the electrode for further #hydrogen production. This finding is pivotal as it enables the prediction and control of bubble behaviour, ensuring that electrolysis can proceed with minimal disruption. The research builds upon the established stability theory for surface nanobubbles (the Lohse-Zhang model) and extends it to include the #electrolytic current density to predict bubble behaviour.   With this improved knowledge, scientists and engineers can now work towards enhancing the detachment of #bubbles. Besides improving the overall efficiency of water electrolysis, this work can also be used in other systems where gas bubbles are formed, such as in #catalysis.