Nyob rau hauv lub realm ntawm electrochemistry, electrochemical cov tshuaj tiv thaiv koom nrog lub zog ntawm lub electrode nto cheeb tsam nrog los ntawm heterogeneous catalytic tshua, zoo ib yam li cov phenomena pom nyob rau hauv tshuaj catalysis. Raws li electrocatalysis, cov txheej txheem no suav nrog kev hloov pauv ntawm cov tshuaj tiv thaiv electrode thiab hom nyob ntawm cov khoom siv electrode substrate nyob rau hauv ib qho electrolyte, nyob rau hauv qhov sib npaug overpotential tej yam kev mob. Kev xaiv cov khoom siv hluav taws xob tsim nyog yog ib qho txiaj ntsig zoo los txhim kho kev ua haujlwm ntawm electrochemical catalytic cov tshuaj tiv thaiv, vim cov khoom siv electrode sib txawv tuaj yeem ua rau muaj kev hloov pauv tseem ceeb hauv cov tshuaj tiv thaiv electrochemical.
Ib qho tseem ceeb ntawm daim ntawv thov ntawm txoj kev electrochemical yog nyob rau hauv kev kho mob ntawm recalcitrant organic teeb meem, nyob rau hauv uas tsis yog-biodegradable organic tebchaw tuaj yeem hloov mus rau hauv cov ntaub ntawv biodegradable. Txij li thaum electrochemical hloov pauv ntawm cov organic tebchaw feem ntau qeeb, ntau lub tswv yim yog ua haujlwm los txhim kho cov txheej txheem. Cov no suav nrog kev nce cov khoom siv hluav taws xob ntau dhau, txhim kho thaj chaw electrode, xaiv cov khoom siv hluav taws xob zoo dua, thiab txhim kho cov qauv electrode.
Tsis tas li ntawd, kev tshawb fawb rau ntau cov khoom siv hluav taws xob yog qhov tseem ceeb hauv cov tshuaj electrochemical. Piv txwv li, kev tsim ntawm Ti/SnO2·Sb2O3·MnO2/PbO2·MnO2 anode piv txwv txog kev siv cov khoom siv hluav taws xob ntau. Qhov laj thawj tseem ceeb ntawm titanium anode tsis ua haujlwm yog nyob rau hauv qhov sib txawv ntawm cov pa oxygen uas tsim los ntawm cov pa oxygen evolution cov tshuaj tiv thaiv, ua rau tsim cov yeeb yaj kiab uas tsis yog-conductive TiO2 ntawm titanium nto. Ib txheej txheej ntawm PbO2MnO2 yog siv rau ntawm electrode nto kom qhib lub anode. Tsis tas li ntawd, txhawm rau txo qhov sib txawv ntawm cov pa oxygen mus rau titanium nto, ib txheej nruab nrab ntawm SnO2·Sb2O3·MnO2 yog nkag los ntawm titanium electrode matrix thiab cov txheej txheem nquag. Qhov no anode nthuav tawm cov kev ua haujlwm siab electrocatalytic thiab electrochemical stability thaum kho cov dej khib nyiab phenolic.
Lub titanium electrode ua haujlwm tseem ceeb hauv cov tshuab dej electrolysis, ncaj qha cuam tshuam rau tag nrho lub tshuab zoo. Kev xaiv ntawm electrodes nyob ntawm qhov tshwj xeeb ntawm kev ua haujlwm koom nrog. Hauv kev kho dej, hlau electrodes yuav tsum ua tau raws li ob peb yam tseem ceeb:
Cov hluav taws xob conductivity zoo heev.
Muaj zog corrosion kuj.
Robust mechanical zog thiab machining kev ua tau zoo.
Lub neej ntev hauv kev ua haujlwm.
Ua tau zoo electrocatalytic kev ua tau zoo.
Tshwj xeeb hauv cov txheej txheem kho dej xws li acid thiab alkali ionized dej tsim los ntawm dej electrolysis, ntau yam muaj zog oxidizing tshuaj xws li O3, H2O2, thiab HCLO muaj nyob hauv dej. Qhov no yuav tsum tau siv cov khoom siv tshwj xeeb electrodes muaj peev xwm tiv taus cov xwm txheej zoo li no. Tom qab kev tshawb fawb dav dav, peb lub tuam txhab tau tsim cov khoom siv hluav taws xob ntev ntev - titanium-coated electrode - tshwj xeeb tsim rau kev kho dej. Cov electrode no muaj cov ntshiab titanium substrate coated nrog noble hlau oxides los ntawm platinum pab pawg neeg. Nws muaj kev ua haujlwm siab electrocatalytic, zoo heev oxidation tsis kam, thiab superior hluav taws xob conductivity.
Qhov zoo ntawm no anode yog raws li nram no:
1. Titanium muaj cov yam ntxwv xws li lub teeb yuag, zoo kawg li lub zog, corrosion kuj, thiab tshwj xeeb tsis kam rau cov chlorine ntub dej, tshaj lwm yam khoom siv hlau. Piv txwv li, thaum dej electrolysis muaj cov kab mob ntawm cov tshuaj chloride, cov hlau tsis muaj hlau tsis zoo rau pitting, ua rau lub neej luv ntawm electrode. Txawm li cas los xij, titanium tsis ntsib cov teeb meem zoo li no.
2. Kev suav nrog ntau pawg platinum cov hlau muaj txiaj ntsig hauv txheej ua kom muaj kev ua haujlwm siab tam sim no, kev ua haujlwm zoo dua, kev ua haujlwm zoo electrocatalytic, muaj zog oxidation tsis kam, kev ua haujlwm ntev, thiab lub zog ua haujlwm.
3. Ua kom pom kev ua tau zoo polarity.
