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Reviewing perovskite oxide sites influence on electrocatalytic reactions for high energy density devices

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Journal of Energy Chemistry 2023年第6期81卷 1-19,I0002页

作者： Lorrane C.C.B.Oliveira Raissa venâncio Paulo v.F.de Azevedo Chayene G.Anchieta Thayane C.M.Nepel Cristiane B.Rodella Hudson Zanin gustavo Doubek Advanced Energy Storage Division Laboratory of Advanced Batteries(LAB)Center for Innovation on New Energies(CINE)School of Chemical EngineeringUniversity of Campinas(Unicamp)CampinasSao Paulo 13083-852Brazil Advanced Energy Storage Division Center for Innovation on New Energies(CINE)Brazilian Renewable Energies(BREnergies)groupManufacturing GroupSchool of Electrical and Computer EngineeringUniversity of Campinas(UNICAMP)CampinasSão Paulo 13083-852Brazil Paul Scherrer Institut(PSI) Swiss Light Source(SLS)Forschungsstrasse 1115232 Villigen PSIAargauSwitzerland Brazilian Center for Research in Energy and Materials(CNPEM)/Brazilian Synchrotron Light Laboratory(LNLS) CampinasSão Paulo 13083-100Brazil

Batteries,fuel cells,and supercapacitors are electrochemical devices already on the market and still need a boost in kinetics to match the high energy density demand of *** have attracted the scientific community's attention in the last decade due to their electrocatalytic activity,chemical and structural properties,tunability,low cost,and *** have been made to understand the active sites and the operational mechanisms in perovskite oxides to shape them as an electrocatalyst in advanced energy *** the role of perovskites is the key to engineering more controlled and efficient electrocatalysts via chemical synthesis,and there is still much to *** review highlights the use of perovskites in different energy storage and conversion *** A,B,and A&B doping-site effects are analyzed to understand the opportunities and challenges related to this class of *** addition,the synthesis methods and the properties related to the doping site are described and summarized.

关键词： Perovskites Energy storage systems Electrocatalysts Battery Oxide fuel cells Capacitors

Single Charged Particle Motion in a Flat Surface with Static Electromagnetic Field and Quantum Hall Effect

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Journal of Modern Physics 2022年第11期13卷 1324-1330页

作者： gustavo.v. López Jorge A. Lizarraga Departamento de Física Universidad de Guadalajara Guadalajara México

Taking into account the non separable solution for the quantum problem of the motion of a charged particle in a flat surface of lengths Lx and Ly with transversal static magnetic field B and longitudinal static electric field E, the quantum current, the transverse (Hall) and longitudinal resistivities are calculated for the state n = 0 and j = 0. We found that the transverse resistivity is proportional to an integer number, due to the quantization of the magnetic flux, and longitudinal resistivity can be zero for times t >> LxB/cE. In addition, using a modified periodicity of the solution, a modified quantization of the magnetic flux is found which allows to have IQHE and FQHE of any filling factor of the form v = k/l, with k, l ∈Z.

关键词： Landau’s Gauge Quantum Hall Effect Degeneration

One Dimensional Conservative System with Quadratic Dissipation and Position Depending Mass

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Journal of Modern Physics 2022年第2期13卷 127-137页

作者： gustavo.v. López Erick S. Madrigal Departamento de Física Universidad de Guadalajara Blvd. Marcelino García Barragan y Calzada Olímpica Guadalajara Jalisco Mexico

Forl a 1-D conservative system with a position depending mass within a dissipative medium, its effect on the body is to exert a force depending on the squared of its velocity, a constant of motion, Lagrangian, generalized linear momentum, and Hamiltonian are obtained. We apply these new results to the harmonic oscillator and pendulum under the characteristics mentioned about, obtaining their constant of motion, Lagrangian and Hamiltonian for the case when the body is increasing its mass.

关键词： Dissipation Position Mass Depending Constant of Motion Hamiltonian

About Degeneration of Landau’s Levels

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Journal of Modern Physics 2022年第2期13卷 122-126页

作者： Jorge A. Lizarraga gustavo.v. López Departamento de Física Universidad de Guadalajara Blvd. Marcelino García Barragan y Calzada Olímpica CP 44200 Guadalajara Jalisco México

Through the non separable solution of the eigenvalue problem associated to the problem of a charged particle in a flat box and a constant transversal magnetic field, with Landau and symmetric gauges, it is found that the Landau’s levels are numerably degenerated in both cases. A mathematical proposition is proven to carry out this statement.

关键词： Landau’s Gauge Symmetric Gauge Quantum Hall Effect Degeneration

Ionic liquid passivated black phosphorus for stabilized compliant electronics

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Nano Research 2023年第5期16卷 7858-7866页

作者： Ravindra Mehta Misook Min Ridwan F.Hossain gustavo A.Saenz Gerardo Gamboa Anupama B.Kaul Department of Materials Science and Engineering PACCAR Technology InstituteUniversity of North TexasDentonTX 76207USA Department of Electrical Engineering University of North TexasDentonTX 76207USA

Black phosphorus(BP)is an attractive material for two-dimensional(2D)electronics and optoelectronics given its direct optical band gap in the ***,the vulnerability of BP to oxygen and moisture under ambient conditions has been a significant impediment for the adoption of this material towards practical *** vulnerability has also curtailed the development of additively manufactured,solution processed,ink-jet printed BP devices,which are cost-effective alternatives to lithographically patterned rigid electronics and optoelectronics based on *** this work,we have fabricated stable BP electronic devices on flexible and compliant substrates using low-cost,additive manufacturing techniques with ink-jet printing through scalable chemical exfoliation *** address the stability issues with BP,ionic liquids(ILs)were used as a passivation layer on the surface of the BP to minimize oxidative *** enhanced stability of BP was inferred through Raman spectroscopy and scanning probe microscopy techniques,where no observable changes in the A^(1)_(g)and A^(2)_(g)Raman vibrational modes were observed with time for the BP films passivated with ILs over a period of 168 h under ambient *** the other hand,a blue-shift in these Raman modes was evident for unpassivated *** probe microscopy measurements clearly revealed the difference in the surface characteristics through localized regions of degradation that intensified with time,which was clearly absent in IL/BP *** stability measurements were also conducted in electronic device platforms for IL coated BP devices,where the temperature T dependence of the I_(ds)-v_(ds)characteristic was measured from T~5.4 to 335 *** demonstrations of stabilized ILs/BP devices at ambient printed on flexible polyimide substrates were also *** irradiation with broadband radiation appears to have a significant influence on the electrical behavior of BP,evident through t

关键词： 2D materials black phosphorus ionic liquids ink-jet printing flexible electronics