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Conducting Polymer-Based e-Refinery for Sustainable Hydrogen Peroxide Production

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Energy & Environmental Materials 2024年第2期7卷 334-342页

作者： Zhixing Wu Penghui Ding Viktor Gueskine Robert Boyd Eric Daniel G■owacki Magnus Odén Xaνier Crispin Magnus Berggren Emma M.Björk Mikhail Vagin Nanostructured Materials Department of PhysicsChemistry and Biology(IFM)Linköping UniversitySE 58183LinköpingSweden Laboratory of Organic Electronics Department of Science and Technology(ITN)Linköping UniversitySE 60174NorrköpingSweden

Electrocatalysis enables the industrial transition to sustainable production of chemicals using abundant precursors and electricity from renewable ***-centralized production of hydrogen peroxide(H_(2)O_(2))from water and oxygen of air is highly desirable for daily life and *** report an effective electrochemical refinery(e-refinery)for H_(2)O_(2)by means of electrocatalysis-controlled comproportionation reaction(2_(H)O+o→2HO),feeding pure water and oxygen *** nickel(Ⅱ)oxide(NiO)was used as electrocatalyst for oxygen evolution reaction(OER),producing oxygen at the *** polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)drove the oxygen reduction reaction(ORR),forming H_(2)O_(2)on the *** reactions were evaluated in both half-cell and device *** performance of the H_(2)O_(2)e-refinery,assembled on anion-exchange solid electrolyte and fed with pure water,was limited by the unbalanced ionic *** of the operation conditions allowed a conversion efficiency of 80%.

关键词： conducting polymer hydrogen peroxide nickel(Ⅱ)oxide oxygen evolution reaction oxygen reduction reaction

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Finding stable multi-component materials by combining cluster expansion and crystal structure predictions

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npj Computational Materials 2023年第1期9卷 2137-2146页

作者： Adam Carlsson Johanna Rosen Martin Dahlqvist Materials Design Department of PhysicsChemistryand Biology(IFM)Linköping UniversitySE-58183 LinköpingSweden

A desired prerequisite when performing a quantum mechanical calculation is to have an initial idea of the atomic positions within an approximate crystal *** atomic positions combined should result in a system located in,or close to,an energy ***,designing low-energy structures may be a challenging task when prior knowledge is scarce,specifically for large multi-component systems where the degrees of freedom are close to *** this paper,we propose a method for identification of low-energy crystal structures within multi-component systems by combining cluster expansion and crystal structure predictions with density-functional theory *** structure prediction searches are applied to the Mo_(2)AlB_(2) and Sc2AlB_(2) ternary systems to identify candidate structures,which are subsequently used to explore the quaternary(pseudo-binary)(Mo_(x)Sc_(1–x))2AlB_(2) system through the cluster expansion formalism utilizing the ground-state search ***,we show that utilizing low-energy structures found within the cluster expansion ground-state search as seed structures within crystal structure predictions of(Mo_(x)Sc_(1–x))2AlB_(2) can significantly reduce the computational *** this combined approach,we not only correctly identified the recently discovered Mo_(4/3)Sc_(2/3)AlB_(2) i-MAB phase,comprised of in-plane chemical ordering of Mo and Sc and with Al in a Kagomélattice,but also predict additional low-energy structures at various *** result demonstrates that combining crystal structure prediction with cluster expansion provides a path for identifying low-energy crystal structures in multi-component systems by employing the strengths from both frameworks.

关键词： structure cluster crystal

Novel fabrication of soft microactuators with morphological computing using soft lithography

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Microsystems & Nanoengineering 2019年第1期5卷 217-226页

作者： Manav Tyagi Jingle Pan Edwin W.H.Jager Sensor and Actuator Systems Department of PhysicsChemistryand Biology(IFM)Linköping UniversityLinköping 58183Sweden

A simple and cost-effective method for the patterning and fabrication of soft polymer microactuators integrated with morphological computation is *** microactuators combine conducting polymers to provide the actuation,with spatially designed structures for a morphologically controlled,user-defined *** lithography is employed to pattern and fabricate polydimethylsiloxane layers with geometrical pattern,for use as a construction element in the *** microactuators could obtain multiple bending motions from a single fabrication process depending on the morphological pattern defined in the final *** of fabricating via conventional photolithography route,which involves multiple steps with different chromium photomasks,this new method uses only one single design template to produce geometrically patterned layers,which are then specifically cut to obtain multiple device *** desired design of the actuator is decided in the final step of *** resulting microactuators generate motions such as a spiral,screw,and tube,using a single design template.

关键词： lithography template pattern

Real-time performance of DAE and ODE based estimators evaluated on a diesel engine

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Science China(Information Sciences) 2018年第7期61卷 27-39页

作者： Erik H?CKERDAL Erik FRISK Lars ERIKSSON Scania CV AB Vehicular Systems Link?ping University

Computation and sampling time requirements for real-time implementation of observers is studied. A common procedure for state estimation and observer design is to have a system model in continuous time that is converted to sampled time with Euler forward method and then the observer is designed and implemented in sampled time in the real time system. When considering state estimation in real time control systems for production there are often limited computational resources. This becomes especially apparent when designing observers for stiff systems since the discretized implementation requires small step lengths to ensure stability. One way to reduce the computational burden, is to reduce the model stiffness by approximating the fast dynamics with instantaneous relations, transforming an ordinary differential equations(ODE)model into a differential algebraic equation(DAE) model. Performance and sampling frequency limitations for extended Kalman filter(EKF)'s based on both the original ODE model and the reduced DAE model are here analyzed and compared for an industrial system. Furthermore, the effect of using backward Euler instead of forward Euler when discretizing the continuous time model is also analyzed. The ideas are evaluated using measurement data from a diesel engine. The engine is equipped with throttle, exhaust gas recirculation(EGR), and variable geometry turbines(VGT) and the stiff model dynamics arise as a consequence of the throttle between two control volumes in the air intake system. The process of simplifying and modifying the stiff ODE model to a DAE model is also discussed. The analysis of the computational effort shows that even though the ODE, for each time-update, is less computationally demanding than the resulting DAE, an EKF based on the DAE model achieves better estimation performance than one based on the ODE with less computational effort. The main gain with the DAE based EKF is that it allows increased step lengths without degrading the

关键词： estimation learning DAE ODE EKF observability real-time

Wireless organic electronic ion pumps driven by photovoltaics

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npj Flexible Electronics 2019年第1期3卷 126-131页

作者： Marie Jakešová Theresia Arbring Sjöström VedranĐerek David Poxson Magnus Berggren Eric Daniel Głowacki Daniel T.Simon Laboratory of Organic Electronics ITN Campus NorrköpingLinköping UniversitySE-60174 NorrköpingSweden Wallenberg Centre for Molecular Medicine Linköping UniversitySE-58185 LinköpingSweden

The organic electronic ion pump(OEIP)is an emerging bioelectronic technology for on-demand and local delivery of pharmacologically active species,especially targeting alkali ions,and *** electrical control is advantageous for providing precise spatial,temporal,and quantitative delivery,traditionally,it necessitates *** complicates ***,we demonstrate integration of an OEIP with a photovoltaic driver on a flexible carrier,which can be addressed by red light within the tissue transparency *** thin-film bilayer photovoltaic pixels are arranged in series and/or vertical tandem to provide the 2.5–4.5 V necessary for operating the high-resistance electrophoretic ion *** demonstrate light-stimulated transport of cations,ranging in size from protons to *** device,laminated on top of the skin,can easily be driven with a red LED emitting through a 1.5-cm-thick *** end result of our work is a thin and flexible integrated wireless device platform.

关键词： precise transparency alkali

Etiology matters:genetic and acquired prion diseases engage different mechanisms at a presymptomatic stage

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Neural Regeneration Research 2023年第12期18卷 2707-2708页

作者： Walker S.Jackson Department of Biomedical and Clinical Sciences Wallenberg Center for Molecular MedicineLinköping UniversityLinköpingSweden

One of the most enigmatic problems in biomedical research surrounds the phenomenon that neurodegenerative diseases target specific cell types and brain *** is difficult to explain because the proteins that cause them are widely expressed,often highest in resistant *** mystery is further complicated by the fact that some disease-causing proteins are associated with multiple diseases.

关键词： diseases degenerative mechanisms

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The nature of the frictional force at the macro-, micro-, and nano-scales

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Friction 2014年第1期2卷 40-46页

作者： Esteban BROITMAN IFM Linköping UniversitySE 58183Sweden

Nowadays it is accepted that the friction force is a combined effect arising from various phenomena:adhesive forces,capillary forces,contact elasticity,topography,surface chemistry,and generation of a third body,*** of them can dominate depending on the experimental force and length scales of the *** forces in macro-tribology are in the Newtons,while are reduced to milli-/micro-Newtons,and nano-Newtons in micro-and nano-tribology,*** this paper,experimental friction results from fullerene like CNx films and single-crystal Si at the three scales will be *** complex and broad variety of processes and phenomena connected with the dry friction coefficient at the macro-,micro-,and nano-scale point of view will be highlighted.

关键词： macrotribology microtribology nanotribology carbon nitride silicon

Molecule doping enables high-quality perovskite junctions for all-perovskite tandem solar cells

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National Science Review 2024年第7期11卷 69-70页

作者： Lingeswaran Arunagiri Feng Gao Department of Physics Chemistry and Biology(IFM) Link?ping University

The maximum theoretical power conversion efficiency(PCE) for single-junction solar cells based on the Shockley-Queisser(S-Q) model is 33.7% for an optimal bandgap(Eg) of 1.34 eV under 1-sun illumination [1]. Multijunction(tandem) solar cells present a realistic option for overcoming the S-Q limit and achieving efficiency of >40%due to decreased thermalization loss in tandem configuration [2].

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Single-wavelength-excited fluorogenic nanoprobe for accurate realtime ratiometric analysis of broad pH fluctuations in mitophagy

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Nano Research 2022年第7期15卷 6515-6521页

作者： Xin Zhang Juan Chen Jiwen Hu Anna du Rietz Xiongyu Wu Ruilong Zhang Zhongping Zhang Kajsa Uvdal Zhangjun Hu Department of Physics Chemistryand Biology(IFM)Linköping UniversityLinköping SE 58183Sweden School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601China

Mitophagy has a critical role in maintaining cellular homeostasis through acidic lysosomes engulfing excess or impaired mitochondria,thereby pH fluctuation is one of the most significant indicators for tracking *** such precise pH tracking demands the fluorogenic probe that has tailored contemporaneous features,including mitochondrial-specificity,excellent biocompatibility,wide pH-sensitive range of 8.0–4.0,and especially quantitative ***,available molecular probes cannot simultaneously meet all the requirements since it is extremely difficult to integrate multiple functionalities into a single *** fully address this issue,we herein integrate two fluorogenic pH sensitive units,a mitochondria-specific block,cellpenetrating facilitator,and biocompatible segments into an elegant silica nano scaffold,which greatly ensures the applicability for real-time tracking of pH fluctuations in *** significantly,at a single wavelength excitation,the integrated pHsensitive units have spectra-distinguishable fluorescence towards alkaline and acidic pH in a broad range that covers mitochondrial and lysosomal pH,thus enabling a ratiometric analysis of pH variations during the whole *** work also provides constructive insights into the fabrication of advanced fluorescent nanoprobes for diverse biomedical applications.

关键词： mitochondrial pH mitophagy ratiometric fluorescence nanoprobe cell imaging