Qhov txawv ntawm qhov concentration polarization thiab kinetic polarization yog qhov concentration polarization los ntawm cov kev hloov hauv cov concentration ntawm cov electrolyte, whereas kinetic polarization yog qhov kev hloov ntawm static permittivity.
Kev sib xyaw polarization thiab kinetic polarization tuaj yeem piav qhia raws li kev koom tes rau lub zog dhau ntawm lub cev. Nyob rau hauv ob qho tib si no, overpotential yog yuav tsum tau rau cov tshuaj tiv thaiv thiab rau lub electron hloov mus rau lub electrode-electrolyte interphase.
Concentration Polarization yog dab tsi?
Concentration polarization yog ib feem ntawm polarization ntawm lub xov tooj ntawm tes electrolytic uas tshwm sim los ntawm kev hloov pauv hauv cov electrolyte concentration uas yog tshwm sim los ntawm kev nkag mus rau tam sim no los ntawm electrode / daws teeb meem. Peb siv lo lus no hauv teb xws li electrochemistry thiab membrane science.
Nyob rau hauv cov ntsiab lus no, peb tuaj yeem nkag siab lub ntsiab lus polarization raws li kev hloov pauv ntawm electrochemical muaj peev xwm sib txawv thoob plaws ntawm tes los ntawm qhov sib npaug ntawm tus nqi peb tau txais rau qhov system no. Yog li ntawd, lub sij hawm yog sib npaug rau concentration overpotential.
Thaum muaj hom tshuaj lom neeg uas koom nrog cov tshuaj tiv thaiv electrochemical electrode muaj cov khoom siv luv luv, peb tuaj yeem pom qhov txo qis ntawm cov hom no ntawm qhov chaw, uas kuj ua rau muaj kev sib txawv. Peb tuaj yeem ntxiv qhov sib txawv rau kev thauj mus los ntawm qhov chaw kom muaj kev sib npaug ntawm kev noj thiab xa cov hom.
Ntxiv mus, peb tuaj yeem pom tias qhov concentration polarization ua rau muaj kev nce ntsev los ntawm daim nyias nyias thiab ua rau muaj qhov tshwm sim ntawm kev loj hlob / fouling. Yog li ntawd, peb tuaj yeem soj ntsuam tias qhov kev xaiv ntawm kev sib cais thiab lub neej ntawm daim nyias nyias lub neej deteriorates.
Daim duab 01: Concentration Polarization
Daim duab 1 qhia cov fluxes thiab concentration profiles hauv ib daim nyias nyias nrog nws cov tshuaj nyob ib puag ncig. Daim duab (a) qhia txog kev siv lub zog tsav mus rau qhov system ntawm qhov pib ntawm qhov sib npaug. Ntawm no, cov flux ntawm cov hom permeating nyob rau hauv daim nyias nyias yog loj dua cov flux ntawm nws nyob rau hauv cov tshuaj. Daim duab (b) qhia cov concentrations uas ua rau muaj kev thauj mus los ntawm diffusion uas nyob rau hauv lem ua rau tag nrho cov flux nyob rau hauv cov tshuaj, txo cov flux nyob rau hauv daim nyias nyias.
YKinetic Polarization yog dab tsi?
Kinetic polarization tuaj yeem piav qhia raws li kev hloov pauv ntawm qhov kev tso cai zoo li qub ntawm cov tshuaj nrog kev hwm ntawm cov kuab tshuaj ntshiab. Lub ntsiab lus tseem ceeb hais txog kinetic polarization yog kinetic polarization deficiency, uas yog hais txog qhov txo qis ntawm cov tshuaj zoo li qub ntawm cov tshuaj sib piv rau cov kuab tshuaj ntshiab. Feem ntau, qhov kev txo qis ntawm qhov no yog proportional rau cov khoom ntawm lub dielectric so lub sij hawm ntawm cov kuab tshuaj thiab qhov tsawg zaus-conductivity ntawm cov tshuaj.
Kinetic polarization yog ib yam mob uas tam sim no raug txwv los ntawm tus nqi ntawm cov hluav taws xob hloov ntawm cov electrode thiab cov reactants hauv cov tshuaj.
Qhov txawv ntawm Concentration Polarization thiab Kinetic Polarization yog dab tsi?
Kev sib xyaw polarization thiab kinetic polarization tuaj yeem piav qhia raws li kev koom tes rau lub zog dhau ntawm lub cev. Qhov sib txawv tseem ceeb ntawm qhov concentration polarization thiab kinetic polarization yog qhov concentration polarization los ntawm cov kev hloov hauv cov concentration ntawm cov electrolyte, whereas kinetic polarization yog qhov kev hloov hauv static permittivity.
Summary – Concentration Polarization vs Kinetic Polarization
Concentration polarization yog ib feem ntawm polarization ntawm lub xov tooj ntawm tes electrolytic uas tshwm sim los ntawm kev hloov pauv hauv cov electrolyte concentration tshwm sim los ntawm kev nkag mus ntawm tam sim no los ntawm electrode / daws interface. Kinetic polarization yog qhov hloov pauv ntawm qhov zoo li qub permittivity ntawm kev daws nrog kev hwm rau cov kuab tshuaj ntshiab txog. Qhov sib txawv tseem ceeb ntawm concentration polarization thiab kinetic polarization yog qhov concentration polarization yog qhov tshwm sim ntawm kev hloov pauv hauv cov concentration ntawm cov electrolyte, whereas kinetic polarization yog qhov kev hloov pauv hauv static permittivity.
