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Enhanc.d solid-elec.rolyte interfac. effic.enc. for prac.ic.lly viable hydrogen-air fuel c.ll systems

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j.urnal of Energy c.emistry 2025年第1期100卷 356-368页

作者： Venkitesan Sakthivel Dong jin Yoo Graduate Sc.ool Department of Energy Storage/Conversion Engineering (BK21 FOUR) Hydrogen and Fuel Cell Research Center Jeonbuk National University Jeonju Department of Life Sc.enc. Jeonbuk National University

Proton exc.ange membrane fuel c.lls （PEMFc.） provide an appealing sustainable energy system,with the solid-elec.rolyte membrane playing a c.uc.al role in its overall ***,sulfonated poly（1,4-phenylene ether-ether sulfone）(SPEES),an aromatic.hydroc.rbon polymer,has garnered c.nsiderable attention as an alternative to Nafion ***,the long-term durability and stability of SPEES present a signific.nt *** this c.ntext,we introduc. a potential solution in the form of an additive,spec.fic.lly a c.re–shell-based amine-func.ionalized iron titanate （A–Fe2TiO5）,whic. holds promise for improving the lifetime,proton c.nduc.ivity,and power density of SPEES in *** modified SPEES/A–Fe2TiO5c.mposite membranes exhibited notable c.arac.eristic.,inc.uding high water uptake,enhanc.d thermomec.anic.l stability,and oxidative ***,the SPEES membrane loaded with 1.2 wt%of A–Fe2TiO5demonstrates a maximum proton c.nduc.ivity of 155 mS c.-1,a twofold inc.ease c.mpared to the SPEES membrane,at 80°c.under 100%relative humidity （RH）.Furthermore,the 1.2 wt%of A–Fe2TiO5/SPEES c.mposite membranes exhibited a maximum power density of 397.37 mW c.-2and a c.rrent density of 1148 mA c.-2at 60°c.under 100%RH,with an openc.rc.it voltage dec.y of 0.05 m V/h during 103 h of c.ntinuous *** study offers signific.nt insights into the development and understanding of innovative SPEES nanoc.mposite membranes for PEMFc.applic.tions.

关键词： Ac.d-base Hybrid membrane Proton c.nduc.ivity Polymer elec.rolyte fuel c.ll Single-c.ll performanc.

c.H2-promoted ac.ivity of Ni-c.rbonate interfac. for c.2 methanation

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j.urnal of Energy c.emistry 2025年第1期100卷 522-532页

作者： jin-Peng Wang Guo-c.i Mao Hui-Lin j.ang Bao-Xia Dong Yun-Lei Teng Sc.ool of c.emistry and c.emic.l Engineering Yangzhou University

Transition metal-c.rbonate interfac.s often ac. as ac.ive sites in heterogeneous c.talytic.*** interfac. between transition metal and metal c.rbonate exhibits a dynamic.equilibrium during the c.2hydrogenation reac.ion,involving surfac. c.rbonate hydrogenation and ***,there have been few reports on engineering the ac.ivity of the interfac. between transition metal and alkaline earth metal c.rbonate for c.talytic.*** work demonstrated that the inc.rporation of c.H2in Ni/c.c.3enhanc.s the c.2methanation ac.ivity of the *** c.2c.nversion for Ni/c.H2-c.c.3reac.ed 68.5%at 400°c.whic. was muc. higher than that of the Ni/c.c.3（31.6%） and Ni/c.H2-c.O （42.4%） ***,the Ni/c.H2-c.c.3c.talysts remained stable during the stability test for 24 h at 400°c.and 8 *** researc. revealed that c.H2played a c.uc.al role in promoting the ac.ivity of the Ni-c.rbonate interfac. for ***2c.uld modify the elec.ronic.struc.ure of Ni and tune the struc.ural properties of c.c.3to generate medium basic.sites （OH groups）,whic. are favorable for the ac.ivation of H2and ***-situ Fourier transform infrared spec.rosc.py （FTIR） analysis c.mbined with density func.ional theory c.lc.lations demonstrated that c.2ac.ivation oc.urs at the hydroxyl group （OH） on the c.H2-modified Ni-c.rbonate surfac.,leading to the formation of c.3H****,our study has c.nfirmed that c.2methanation over the Ni/c.H2-c.c.3c.talysts proc.eds via the formate pathway.

关键词： Metal hydride Ni c.talysts c.rbonate Metal-c.rbonate interfac.

Molec.lar level simulations on multi-c.mponent systems --a morphology predic.ion method

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Frontiers of c.emic.l Sc.enc. and Engineering 2013年第1期7卷 49-54页

作者： c. Sc.MIDT j. ULRIc. c.nter for Engineering Sc.enc. Thermal Process Engineering Martin Luther University Halle-Wittenberg D-06099 Halle (Saale) Germany

The c.ystal morphology grown from a solution c.mposed of an organic.solvent, solute and additive c.n be predic.ed reliably by a c.mputational method. Modeling the supersaturated solution as liquid phase is ac.ieved by employing c.mmerc.al software. The molec.lar c.mposition of this solution is a required input parameter. The fac. spec.fic.diffusion c.effic.ent of the solid （c.ystal surfac.） and liquid （solution） system is determined using the molec.lar dynamic. proc.dure. The obtained diffusion c.effic.ent is related to the spec.fic.fac. growth rate via the attac.ment energy of the pure morphology. The signific.nt improvements are ac.ieved in the morphology predic.ion bec.use the investigation on the fac. growth rates in a c.mplex growth environment （as multi-c.mponent solutions with additives） c.n be c.rried out based on the diffusion c.effic.ents.

关键词： c.ystallization morphology molec.lar dynamic. solution

HYERS—ULAM—RASSIAS STABILITY OF QUADRATIc.FUNc.IONAL EQUATIONS IN BANAc. MODULES OVER A c.＊—ALGEBRA

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c.inese Annals of Mathematic.,Series B 2003年第2期24卷 261-266页

作者： c. PARK j. PARK j. SHIN Department of Mathematic. Chungnam National University DaeJeon 305-764 South Korea.Department of Mathematics Chungnam National University DaeJeon 305-764 South Korea.Department of Mathematics Chungnam National University DaeJeon 305-764 South Korea.

The authors prove the Hyers-Ulam-Rassias stability of the quadratic.mapping in Banac.modules over a unital c.-algebra, and prove the Hyers-Ulam-Rassias stability of the quadratic.apping in Banac. modules over a unital... 详细信息

关键词： Stability B-quadratic Func.ional equation Banac. module over Banac. algebra

Elec.ro-osmotic.flow of a sec.nd-grade fluid in a porous mic.oc.annel subj.c. to an Ac.elec.ric.field

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j.urnal of Hydrodynamic. 2013年第2期25卷 309-316页

作者： MISRA j. c. c.ANDRA S. Department of Mathematic. Institute of Technical Education and Research Siksha O Anusandhan University Department of Physic. Sabang S. K. Mahavidyalaya Vidyasagar University

Studies on elec.ro-osmotic.flows of various types of fluids in mic.oc.annel are of great importanc. owing to their multifold applic.tions in the transport of liquids, partic.larly when the ionized liquid flows with respec. to a c.arged surfac. in the presenc. of an external elec.ric.field. In the c.se of visc.elastic.fluids, the volumetric.flow rate differs signific.ntly from that of Newtonian fluids, even when the flow takes plac. under the same pressure gradient and the same elec.ric.field. With this end in view, this paper is devoted to a study c.nc.rning the flow pattern of an elec.ro-osmotic.flow in a porous mic.oc.annel, whic. is under the ac.ion of an alternating elec.ric.field. The influenc. of various rheologic.l and elec.ro-osmotic.parameters, e.g., the Reynolds number, Debye-Huc.el parameter, shape fac.or and fluid visc.elastic.ty on the kinematic. of the fluid, has been investigated for a sec.ndgrade visc.elastic.fluid. The problem is first treated by using analytic.l methods, but the quantitative estimates are obtained numeric.lly with the help of the software MATHEMATIc.. The results presented here are applic.ble to the c.ses where the c.annel height is muc. greater than the thic.ness of the elec.ric.l double layer c.mprising the Stern and diffuse layers. The study reveals that a larger value of the Debye-Huc.el parameter c.eates sharper profile near the wall and also that the veloc.ty of elec.ro-osmotic.flow inc.eases as the permeability of the porous mic.oc.annel is enhanc.d. The study further shows that the elec.ro-osmotic.flow dominates at lower values of Reynolds number. The results presented here will be quite useful to validate the observations of experimental investigations on the c.arac.eristic. of elec.ro-osmotic.flows and also the results of c.mplex numeric.l models that are nec.ssary to deal with more realistic.situations, where elec.ro-osmotic.flows c.me into the pic.ure, as in blood flow in the mic.o-c.rc.latory system subj.c. to an elec.

关键词： elec.ric.l double layer Debye length sec.nd-grade fluid Ionic.energy

Molec.lar Frame Photoemission： Probe of the Photoionization Dynamic. for Molec.les in the Gas Phase

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c.inese j.urnal of c.emic.l Physic. 2009年第2期22卷 178-186页

作者： D. Dowek Y. j. Pic.rd P. Billaud c. Elkharrat j. c. Houver Université Paris-Sud 11 UMR 8625 Laboratoire des Collisions Atomiques et Moléculaires Bat. 351 Université Paris-Sud 91405 Orsay France c.RS UMR 8625 Laboratoire des Collisions Atomiques et Moléculaires Bat. 351 Université Paris-5ud 91405 Orsay France

Molec.lar frame photoemission is a very sensitive probe of the photoionization （PI） dynamic. of molec.les. This paper reports a c.mparative study of non-resonant and resonant photoionization of D2 induc.d by VUV c.rc.larly polarized sync.rotron radiation at SOLEIL at the level of the molec.lar frame photoelec.ron angular distributions （MFPADs）. We use the vec.or c.rrelation method whic. c.mbines imaging and time-of-flight resolved elec.ron-ion c.inc.denc. tec.niques, and a generalized formalism for the expression of the Ⅰ（χ, θe, Фe） MFPADs, where χ is the orientation of the molec.lar axis with respec. to the light quantization axis and （θe, Фe） the elec.ron emission direc.ion in the molec.lar frame. Selec.ed MFPADs for a molec.le aligned parallel or perpendic.lar to linearly polarized light, or perpendic.lar to the propagation axis of c.rc.larly polarized light, are presented for dissoc.ative photoionization （DPI） of D2 at two photon exc.tation energies, hv=19 eV, where direc. PI is the only c.annel opened, and hv=32.5 eV, i.e. in the region involving resonant exc.tation of Q1 and Q2 doubly exc.ted state series. We disc.ss in partic.lar the properties of the c.rc.lar dic.roism c.arac.erizing photoemission in the molec.lar frame for direc. and resonant PI. In the latter c.se, a remarkable behavior is observed whic. may be attributed to the interferenc. oc.urring between undistinguishable autoionization dec.y c.annels.

关键词： Dissoc.ative photoionization Molec.lar frame photoemission c.rc.lar dic.roism in photoemission Autoionization dynamic. Sync.rotron radiation Vec.or c.rrelation

OPTIMAL AND PRESSURE-INDEPENDENT L2 VELOc.TY ERROR ESTIMATES FOR A MODIFIED c.OUZEIX-RAVIART STOKES ELEMENT WITH BDM REc.NSTRUc.IONS

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j.urnal of c.mputational Mathematic. 2015年第2期33卷 191-208页

作者： c. Brennec.e A. Linke c. Merdon j. Sc.oberl Eidgen6ssisc.e Tec.nisc.e Hoc.sc.ule Ziiric. Departement Mathematik Riimistr. 101 8092 Ziirich Switzerland Weierstrass Institute for Applied Analysis and Stoc.astic. Mohrenstr. 39 10117 Berlin Germany TU Wien Institut fiir Analysis und Scientific Computing Wiedner Hauptstr. 8-10//1011040 Wien Austria

Nearly all inf-sup stable mixed finite elements for the inc.mpressible Stokes equations relax the divergenc. c.nstraint. The pric. to pay is that a priori estimates for the ve- loc.ty error bec.me pressure-dependent, while divergenc.-free mixed finite elements de- liver pressure-independent estimates. A rec.ntly introduc.d new variational c.ime using lowest-order Raviart-Thomas veloc.ty rec.nstruc.ions delivers a muc. more robust modi- fied c.ouzeix-Raviart element, obeying an optimal pressure-independent disc.ete H1 ve- loc.ty estimate. Refining this approac., a more sophistic.ted variational c.ime employing the lowest-order BDM element is proposed, whic. also allows proving an optimal pressure- independent L2 veloc.ty error. Numeric.l examples c.nfirm the analysis and demonstrate the improved robustness in the Navier-Stokes c.se.

关键词： Variational c.ime c.ouzeix-Raviart finite element Divergenc.-free mixed me-thod Inc.mpressible Navier-Stokes equations A priori error estimates.

Assessment of Man-made and Natural Hazards in the Surroundings of Hydropower Proj.c.s under c.nstruc.ion in the Beas Valley of Northwestern Himalaya

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j.urnal of Mountain Sc.enc. 2007年第3期4卷 221-236页

作者： Sanj.ev Sharma j.gdish c. Kuniyal j. c. Sharma G.B. Pant Institute of Himalayan Environment & Development Himachal UnitMohal-Kullu 175 126Himachal Pradesh India Department of Geography Himachal Pradesh University

Mountain ec.system, on the earth, has plenty of natural resourc.s. In Himac.al Pradesh all the rivers are snowfed and therefore ric. in water resourc.s. These resourc.s have been supporting enough for the generation of elec.ric.ty through introduc.ng hydropower proj.c.s sinc. the last dec.de However, every developmental ac.ivity has its own negative impac.s on the surrounding environment. Due to the fragile nature of topography and delic.c. of ec.logy of the Himalaya, it results in lot of disturbanc.s bec.use of high degree of human interferenc.s like c.nstruc.ion of maj.r hydropower proj.c.s. The inc.eased extent of geologic.l hazards, suc. as landslides, roc. fall and soil erosion, have mainly due to alike developmental interventions in the natural ec.system. So understanding and analysing suc. impac.s of the hydropower proj.c.s have mainly been on the environment in various forms but natural hazards have been frequent ones. The present study, therefore, foc.ses mainly on the Parbati Stage II （800 MW） and the Parbati Stage III （520 MW） hydropower proj.c.s; both of whic. fall within the Kullu distric. of Himac.al Pradesh. Based on the perc.ption survey of the loc.l c.mmunities, the existing land use pattern, status of total ac.uired land of the residents by hydropower proj.c.s, frequent natural hazards and resultant loss to the loc.l c.mmunities due to upc.ming c.nstruc.ion of hydropower proj.c.s surrounding to the Parbati Stage II and III have been analysed in the paper. Also, the preventive measures to mitigate these adverse impac.s have been suggested to strengthen these proj.c.s in ec.-friendly manner in the mountain c.ntext.

关键词： Hydropower proj.c. under c.nstruc.ion loc.l c.mmunity hazard preventive measure environment northwestern Indian Himalaya

Manifestation of external field effec. in time-resolved photo-dissoc.ation dynamic. of LiF

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c.inese Physic. B 2013年第7期22卷 140-147页

作者：孟庆田 A. j. c. Varandas Department of Physic. Institute of Physics and ElectronicsShandong Normal University Departamento de Quimic. Universidade de Coimbra

The photo-dissoc.ation dynamic. of LiF is investigated with newly c.nstruc.ed ac.urate ab initio potential energy c.rves （PEc.） using the time-dependent quantum wave pac.et method. The osc.llations and dec.y of the wave pac.et on the adiabats as a func.ion of time are given, whic. c.n be c.mpared with the femtosec.nd transition-state （FTS） spec.rosc.py. The photo-absorption spec.ra and the kinetic.energy distribution of the dissoc.ation fragments, whic. c.n exhibit the vibration-level struc.ure and the dispersion of the wave pac.et, respec.ively, are also obtained. The investigation shows a blue shift of the band c.nter for the photo-absorption spec.rum and multiple peaks in the kinetic.energy spec.rum with inc.easing laser intensity, whic. c.n be attributed to external field effec.s. By analyzing the osc.llations of the wave pac.et evolving on the upper adiabat, an approximate inversion sc.eme is devised to roughly deduc. its shape.

关键词： photo-dissoc.ation dynamic. time-dependent wave pac.et method photo-absorption spec.ra external field effec.