Gas marbles are a new family of particle-stabilized soft dispersed system with a soap bubble-like air-in-water-in-air structure. ⚪ Prof. Dr.-Ing. Silke H. Christiansen, Dr. Sabrina Pechmann and Dr. Hyoungwon Park together with researchers from the Osaka Institute of Technology, the Université de Lille and the University of Hyogo, have produced hydrophobic polymer granules that encase these gas marbles. The resulting marbles can be used to safely transport gases across the surface of a liquid and then release them via chemical triggers. Our task was to use high-resolution computer tomography to obtain a virtual and thus non-destructive view of the inside of the gas marbles and thus to determine their structure in more detail. Swipe through the paper 👇 or follow the link: https://bit.ly/3VS6PWx © Advanced Science (Wiley) #paper #carrier #gas #marble #interface
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Professor at Indian Institute of Technology Roorkee, FRSC, FInstP, FEI, Head, Center for Sustainable Energy, Indian Institute of Technology Roorkee
Double halide perovskite with structural diversity can be a potential candidate for artificial photosynthesis! In a recent work, we have tried to modify Cs3Bi2Cl9 perovskite structure to synthesize double halide Cs2CuBiCl6 perovskite. But to our surprise, we have observed that Cs2CuBiCl6 perovskite does nor form; rather, Cu stays as an interstitial dopant in its pristine Cs3Bi2Cl9 structure. The Cu-Cs3Bi2Cl9 are found to exhibit enhanced CO2 photoreduction activity than the pristine Cs3Bi2Cl9. Further, transient absorption results show that Cu dopants enhance the carrier generation. Such insights hold promise for the advancement of next-generation photocatalytic materials for liquid fuel generation. It was a great collaboration with Prof. K.K. Pant, Prof. Dibyajyoti Ghosh and Prof. Komal Tripathi! Check our recent interesting work in Advanced Energy Materials! #perovskite #CO2reduction #Wiley #IITRoorkee https://lnkd.in/gevAh4zf
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Investigation of #Adsorption #Kinetics on the Surface of a Copper-Containing Silicon–#Carbon #Gas #Sensor: Gas Identification by Nina K. Plugotarenko et al. C 2023, 9(4), 104; https://lnkd.in/d8JxZAHp Current number of article views: 1038 Abstract The low selectivity of materials to gases of a similar nature may limit their use as sensors. Knowledge of the adsorption kinetic characteristics of each gas on the surface of the material may enable the ability to identify them. In this work, copper-containing silicon–carbon films were formed using electrochemical deposition on the Al2O3 substrate with interdigitated Cr/Cu/Cr electrodes. These films showed good adsorption characteristics with several different gases. The adsorption kinetics of nitrogen dioxide, sulfur dioxide, and carbon monoxide on the film surface were investigated by the change in the resistivity of the material. Pseudo-first-order and pseudo-second-order kinetics, Elovich, Ritchie, and Webber intraparticle diffusion models were applied. It was found that the largest approximation factor and the lowest Root-Mean-Square Error and Mean Bias Error for all three gases were for the Elovich model. The advantages of silicon–carbon copper-containing films for gas sensor applications were shown. An algorithm for gas recognition was proposed based on the dependence of the change in the resistivity of the material under stepwise gas exposure. It was found that parameters such as the values of the extrema of the first and second derivatives of the R vs. t dependence during adsorption and the slope of R vs. t dependence in the Elovich coordinates are responsible for gas identification among several one-nature gases. Keywords: silicon–#carbon films; #adsorption #kinetics; #modeling; #gas identification
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I am pleased to inform that my current work has been published online titled: Augmented Extraction Efficiency of a Hot D Exciton in MoS2 via Intervalley Scattering https://lnkd.in/gVYECxgm This work explored a D exciton state in MoS2 monolayer for the first time which prolonged hot carrier cooling up to 155 ps, a magnitude of order longer than the longest duration in perovskites (14.3 ps) and 100 to 1000 times than normal A, B excitons. In addition, the extraction efficiency of hot carrier D exciton via TiOx reached the highest value of 98% overcoming the C exciton extraction yield via graphene (80%). This work paved the way for ensuing studies for side-photovoltaic-valley hot carriers to achieve the high open circuit voltage in a practical solar cell.
Augmented Extraction Efficiency of a Hot D Exciton in MoS2 via Intervalley Scattering
pubs.acs.org
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The nature of the #electrolyte cation is known to have a significant impact on electrochemical reduction of CO2 at catalyst|electrolyte interfaces. An understanding of the underlying mechanism responsible for catalytic enhancement as the alkali metal cation group is descended is key to guide catalyst development. * In the article “Studying the cation dependence of CO2 reduction intermediates at Cu by in situ VSFG spectroscopy” Liam C. Banerji, Hansaem Jang, Adrian M. Gardner and Alexander J. Cowan use in situ vibrational sum frequency generation (VSFG) spectroscopy to monitor changes in the binding modes of the CO intermediate at the electrochemical interface of a polycrystalline Cu electrode during #CO2reduction as the #electrolyteCation is varied. * The results presented in the article suggest that a high level of bridge site formation is related to, or facilitated by, the Cu restructuring that happens as a result of the use of the Cs+ cations in the supporting electrolyte. Recent reports have indicated that multiple (bridge) bound CO may be electrochemically inert but this work builds on the emerging evidence that #CObridge sites are a key intermediate in the CO–CO coupling step that is required for C2+ formation during eCO2R. * NanoWorld Pointprobe® CONTR #AFMprobes https://lnkd.in/eUx3rmi for contact mode #atomicforcemicroscopy ( #AFM) were used to characterize the #morphology of the #CUelectrode surface before bulk electrolysis and after bulk electrolysis.* Please have a look at the NanoWorld blog for the full citation and a direct link to the full article #ElectrolyteInterfaces #原子力显微镜探针 #AFM探针 https://lnkd.in/eZpVd4ek
Studying the cation dependence of CO2 reduction intermediates at...
https://www.nanoworld.com/blog
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Toxic fluoride gas emissions from lithium-ion battery fires; "Lithium-ion battery fires generate intense heat and considerable amounts of gas and smoke. Although the emission of toxic gases can be a larger threat than the heat, the knowledge of such emissions is limited. This paper presents quantitative measurements of heat release and fluoride gas emissions during battery fires for seven different types of commercial lithium-ion batteries. The results have been validated using two independent measurement techniques and show that large amounts of hydrogen fluoride (HF) may be generated, ranging between 20 and 200 mg/Wh of nominal battery energy capacity. In addition, 15–22 mg/Wh of another potentially toxic gas, phosphoryl fluoride (POF3), was measured in some of the fire tests. Gas emissions when using water mist as extinguishing agent were also investigated. Fluoride gas emission can pose a serious toxic threat and the results are crucial findings for risk assessment and management, especially for large Li-ion battery packs.Fredrik Larsson, et al.; NIH National Library of Medicine, National Center for Biotechnology Information;": https://lnkd.in/eCKV9hTc
Toxic fluoride gas emissions from lithium-ion battery fires
ncbi.nlm.nih.gov
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🚀 Excited to Share Our Latest Research Paper! 📝 Our research paper titled “The Effect of Doping TiO₂ Monolayer with Sn⁺⁴, Pb⁺⁴, and S⁻² Ions on H₂ Production by Photocatalytic Water Splitting: Periodic DFT Modeling” has just been published in the Iranian Journal of Science. 🔍 Key Findings: • Mono-doping with Sn⁺⁴ and Pb⁺⁴, as well as co-doping (Sn⁺⁴-S⁻² and Pb⁺⁴-S⁻²), modifies the band gap energy of the TiO₂ monolayer. • These structural adjustments enhance photocatalytic efficiency, making them promising candidates for hydrogen production. 🌱 Why It Matters: Our findings hold promise for more efficient and sustainable hydrogen production, contributing to the advancement of clean energy technologies. 🔗 Read the full paper here[https://lnkd.in/dTQUXiZE] #Research #CleanEnergy #HydrogenProduction #Photocatalysis #DFTModeling #SustainableTechnology
The Effect of Doping TiO2 Monolayer with Sn+4, Pb+4, and S-2 Ions on H2 Production by Photocatalytic Water Splitting: Periodic DFT Modeling - Iranian Journal of Science
link.springer.com
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Fundamental Theory of Electromagnetic Spectrum, Dielectric and Magnetic Properties, Molecular Rotation, and the Green Chemistry of Microwave Heating Equipment https://lnkd.in/gxk98rPN
Fundamental Theory of Electromagnetic Spectrum, Dielectric and Magnetic Properties, Molecular Rotation, and the Green Chemistry of Microwave Heating Equipment
onlinelibrary.wiley.com
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#Selectedpapers in #Batteries_MDPI in topic "Redox Flow Batteries and Solid-State Batteries" "Nitrogen, Phosphorus Co-Doped Graphite Felt as Highly Efficient Electrode for VO2+/VO2+ Reaction" 🔗 Read the full article: https://brnw.ch/21wLggi 👉 Check out more papers in topic "Redox Flow Batteries and Solid-State Batteries": https://brnw.ch/21wLggj Abstract All-vanadium redox flow batteries hold promise for the next-generation grid-level energy storage technology in the future. However, the low electrocatalytic activity of initial graphite felt constrains the development of VRFBs. Furthermore, the positive VO2+/VO2+ reaction involves complex multistep processes and more sluggish kinetics than negative V2+/V3+ reaction. Therefore, enhancing the kinetics of positive reaction is especially important. Heteroatom doping is one of the effective strategies for preparing carbon electrodes with high electrocatalytic activity and good stability. Here, a nitrogen, phosphorus co-doped graphite felt is prepared. Nitrogen introduces more negative charge into the carbon lattice due to the higher electronegativity, and more oxygen-containing functional groups will be introduced into the carbon lattice due to phosphorus-doped graphite felt. N, P co-doping provides more adsorption sites for vanadium ions. As a result, nitrogen, phosphorus co-doped graphite felt shows high electrochemical activity and good stability, and the corresponding VRFB presents a good voltage efficiency of 75% at a current density of 300 mA cm−2, which is 11% higher than the pristine graphite felt. During 100 charge/discharge cycles, the energy efficiency and voltage efficiency remain at 84% and 86% under the current density of 150 mA cm−2. Keywords: energy storage; all-vanadium redox flow battery; N,P co-doping graphite felt; kinetic; electrocatalysis; battery efficiency #openaccess #article
Nitrogen, Phosphorus Co-Doped Graphite Felt as Highly Efficient Electrode for VO2+/VO2+ Reaction
mdpi.com
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#Electrocatalytic Enhancement of CO Methanation at the Metal–#Electrolyte Interface Studied Using In Situ X-ray #Photoelectron #Spectroscopy by Christoph W. Thurner et al. C 2023, 9(4), 106; https://lnkd.in/dztXt93p Current number of article views: 1259 Abstract For the direct reduction of CO2 and H2O in solid oxide electrolysis cells (SOECs) with cermet electrodes toward methane, a fundamental understanding of the role of elemental carbon as a key intermediate within the reaction pathway is of eminent interest. The present synchrotron-based in situ near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS) study shows that alloying of Ni/yttria-stabilized-zirconia (YSZ) cermet electrodes with Cu can be used to control the electrochemical accumulation of interfacial carbon and to optimize its reactivity toward CO2. In the presence of syngas, sufficiently high cathodic potentials induce excess methane on the studied Ni/yttria-stabilized-zirconia (YSZ)-, NiCu/YSZ- and Pt/gadolinium-doped-ceria (GDC) cermet systems. The hydrogenation of carbon, resulting from CO activation at the triple-phase boundary of Pt/GDC, is most efficient. Keywords: SOEC; methanation; #electrocatalysis; NAP-#XPS
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