Titanium electrodes rau dej electrolysis rau hydrogen ntau lawm
Cov dej electrolysis hydrogen ntau lawm kev lag luam muaj keeb kwm ntev, thiab cov electrolytic cell feem ntau siv cov lim-nias hom bipolar qauv los yog lub thawv-hom monopole qauv.
Electrolysis ntawm dej yog kom dhau ib qho ncaj qha tam sim no hauv dej los tsim hydrogen thiab oxygen. Roj hlwb siv hydrogen ua roj. Txhawm rau txhawm rau txhim kho ib puag ncig thiab txo cov pa phem, hydrogen yuav siv los ua lub zog rau lub tsheb yav tom ntej. Dej electrolysis yog tib txoj hauv kev ua kom hydrogen los ntawm dej.
Hauv dej electrolysis, oxygen tso tawm ntawm cathode thiab oxygen tso tawm ntawm lub anode tib lub sijhawm. Qhov sib npaug ntawm cov tshuaj tiv thaiv yog:
H2O — (electrolysis) H2 ntxiv (1/2) O2
Nyob rau hauv lub electrolytic cell voltage, lub anode overpotential thiab cathode overpotential account rau ib tug loj feem. Qhov loj ntawm qhov overpotential muaj ntau yam ua rau cov khoom siv electrode siv.
Electrolytic cell ntawm dej electrolysis yog tsim los ntawm plaub yam: anode, cathode, electrolyte thiab diaphragm. Kev poob hluav taws xob sib txawv los ntawm kev sib xyaw ntawm cov khoom siv electrode thiab electrolyte.
Hauv cov dej electrolyzers, cov electrolyte siv 20-30 feem pua KOH lossis NaOH aqueous tov, thiab qhov kub thiab txias yog 50-70 degrees. Nickel-plated steel ntawv yog siv rau insoluble anode thiab carbon steel yog siv rau cathode. Ntau txoj kev kho saum npoo tau raug txiav txim siab txhawm rau txo cov hydrogen overpotential. Sulfur-muaj nickel electroplating yog dav siv nyob rau hauv Nyiv. Ntxiv NaCNS rau cov tshuaj aqueous ntau tuaj yeem tau txais sulfur-muaj dub-grey npib tsib xee plating. Piv nrog carbon steel, nws cov hydrogen overpotential yog 250-300mv qis dua. Piv nrog rau cov ntawv hlau nickel-plated, cov pa oxygen overpotential kuj yog 100mv qis dua.
Nyiv tau tsim cov txheej txheem polymer dej electrolysis, uas tuaj yeem siv cov fluororesin-based ion exchange membrane ua cov khoom electrolyte rau proton conductors. Vim lub thinning ntawm cov khoom polymer electrolyte, cov electrolyte kuj raug txo, uas yog qhov zoo rau kev ua haujlwm electrolysis ntawm qhov ceev tam sim no.
Yog tias siv cov khoom siv oxide electrolyte, nws tuaj yeem siv cov txheej txheem dej kub kub electrolysis siv dej vapor. Lub theoretical decomposition voltage ntawm cov txheej txheem no yog me me, tus nqi ntawm lub zog hluav taws xob yuav tsum raug txo, thiab tshwj xeeb tshaj yog cov overpotential, uas yog qhov tsis kam ntawm cov tshuaj tiv thaiv electrolysis, txo. Electrolysis txoj kev uas ua haujlwm electrolysis ntawm qhov siab tshaj plaws thiab qis tshaj ntawm tes.
Hauv alkaline dej electrolysis, nickel-plated steel yog siv rau cov electrode, npib tsib xee ntawm tib lub cev, los yog nickel-plated low-carbon steel, thiab cov hlau me me yog siv rau cathode. Raws li cov khoom siv cathode tshiab, ib qho ntxeem tau npib tsib xee electrode nrog thaj tsam loj yuav tsum tau sim.
Nyob rau hauv cov khoom polymer hom dej electrolysis, txij li thaum muaj zog acid electrolyte yog siv, cov khoom siv electrode yuav tsum tau tiv taus acid corrosion, yog li cov khoom pheej yig xws li npib tsib xee thiab hlau tsis tuaj yeem siv, thiab cov khoom siv hlau platinum kim yuav tsum tau siv.
Platinum-iridium-coated titanium electrode, tus qauv qauv khoom muaj peev xwm muab dej ntawm 1000 (L / h), uas yog kev lag luam thiab siv tau, thiab tau yeej qhov kev nyiam ntawm feem coob ntawm cov neeg siv khoom nrog cov cuab yeej siv siab heev, cov cuab yeej paub tab, txhim khu kev qha. zoo thiab tus nqi tsim nyog. Cov khoom tuaj yeem kho raws li qhov xav tau tiag tiag ntawm cov neeg siv khoom.
Platinum yog ib tug silvery-dawb ci hlau nrog ib tug melting point ntawm 1772 degree, lub boiling point ntawm 3827 ± 100 degree, ib tug ceev ntawm 21.45 g / cm3 (20 degree), mos, zoo ductility, thermal conductivity thiab hluav taws xob conductivity. Daim txhuam cev platinum yog cov khoom zoo li daim txhuam cev grey nrog thaj chaw loj tshwj xeeb thiab muaj peev xwm nqus tau rau cov pa roj (tshwj xeeb yog hydrogen, oxygen thiab carbon monoxide). Hmoov platinum dub tuaj yeem nqus tau ntau cov hydrogen. Cov khoom siv tshuaj lom neeg ntawm platinum tsis ua haujlwm thiab ruaj khov nyob rau hauv huab cua thiab huab cua. Thaum tshav kub qis dua 450 degree, lub platinum dioxide zaj duab xis yog tsim rau ntawm qhov chaw, uas tuaj yeem hnov mob nrog sulfur, phosphorus thiab halogen ntawm qhov kub thiab txias. Platinum yog insoluble nyob rau hauv hydrochloric acid, sulfuric acid, nitric acid thiab alkali daws, tab sis soluble nyob rau hauv aqua regia thiab molten alkali. Lub xeev oxidation ntawm platinum yog ntxiv rau 2, ntxiv rau 3, ntxiv rau 4, ntxiv rau 5, ntxiv rau 6. Nws yog ib qho yooj yim los tsim cov sib xyaw ua ke, xws li [Pt(NH3)2]Cl2, K[Pt(NH3)Cl5]. Platinum thiab nws cov alloys tiv taus oxidation thiab corrosion ntawm qhov kub thiab txias, thiab yog siv los ua crucibles, evaporating lauj kaub tais diav, electrodes, nozzles, reactors, thiab lwm yam. Platinum thiab platinum-rhodium alloys yog siv los ua cua sov xov hlau thiab thermocouples nyob rau hauv kub kub furnaces. metallurgical, iav thiab ceramic industries. Platinum kuj yog siv los ua cov hniav nyiaj hniav kub.
Baoji JM-TITANIUM - Kev tshaj lij anode tsim thiab chaw tsim khoom
Tau ntau xyoo, peb tau tshwj xeeb hauv anode kev tshawb fawb thiab kev tsim kho, tsim thiab tsim, thiab peb cov khoom raug xa tawm mus rau ntau lub teb chaws thoob ntiaj teb. Ntau yam ntawm cov anodes tuaj yeem tsim thiab tsim raws li qhov tseeb ib puag ncig ntawm cov neeg siv sib txawv. Zoo siab txais tos tuaj xyuas thiab sib tham.
Nicole
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