titanium fiber ntau
titanium xav
(1) Siv titanium xav tias sintered li roj cell diffusion txheej, carbon fiber yooj yim rau corrosion;
(2) Titanium sintering muaj txheej txheej txheej txheej txheej txheej txheej txheej txheej txheej txheej, mem tes electroplating;
Qhov qis tshaj plaws titanium fiber ntau thickness yog 0.25mm, lub porosity yog 50-70 feem pua, thiab cov qauv yog ntau conducive rau huab cua-kua huab cua huab cua hloov mus rau hauv huab cua huab cua huab cua huab cua huab cua huab cua. .High precious hlau noj, pluag txheej stability thiab poob anode catalytic txheej.
1. Titanium hnov anode gas diffusion txheej
Sintered titanium xav tau ua lub substrate rau platinum catalyst deposition.Cov qauv siv yog ncig, 30mm inch, 1 hli tuab, thiab muaj ib tug porosity siab tshaj 70 feem pua .Specific processing cov kauj ruam yog raws li nram no:
(1) Demembrane: lub titanium xav tau siv nyob rau hauv ib tug electrolytic pickling kua los ntawm , raws li nitric acid thiab hydrofluoric acid, pH 0.5 ntawm chav tsev kub; tom qab ntawd 2.5V voltage tau siv rau qhov kev xav, ua rau lub anode ntawm titanium / Ti 2 nto dissolution.A titanium expansion mesh raws li electrode plated los ntawm Wieland Edelmetalle platinum tau siv rau kev npaj cov kauj ruam rau lub hom phiaj no.
(2) Argon roj tu: tom qab ntxuav nrog dej deionized, qhov saum npoo ntawm titanium workpiece yog plasma kho hauv argon roj kom tshem tawm cov pa phem uas seem rau ntawm titanium nto.Lub plasma reactor siv Pink V 15-G qauv ntawmTopTechnrog cov kev txwv tsis pub dhau argon ntws ntawm 100 ml min-1, thiab tau kho ntawm 60 Pa rau 30 min nrog lub zog microwave ntawm 400 W.
(3) Plating: lub plasma lub cev tu txheej txheem txuas ntxiv yog ntxuav nrog dej deionized, thiab titanium fiber tam sim ntawd coated nrog platinum los ntawm electrochemistry nyob rau hauv argon gas.Cov lag luam muaj electroplating da dej hom Galvatron Platinbad los ntawmTopTechtau siv raws li hexachloroplatin acid.Qhov da dej tsis tau teem rau pH thiab kub ntawm 50 C.The plating txheej txheem tau ua nyob rau hauv ib tug tas li cathode voltage rau 10 min, -3.2 V nrog rau rov qab electrode (titanium / platinum los ntawm Wieland Edelmetalle).Thaum lub sijhawm txheej txheem plating, titanium electrodes tau muab tso rau hauv hluav taws xob ntawm ob qho kev sib txuas ua ke electrodes. , lub plating hom tau hloov mus rau pulse plating tus khub electrode ntawm lub cathode voltage ntawm -3.0 V yam tsis muaj kev cuam tshuam cov txheej txheem.Lub sijhawm teem rau 10 ms thiab lub sijhawm tawm mus rau 56.7 ms, yog li lub luag haujlwm voj voog yog 15 feem pua lub voj voog.Qhov thib ob ntawm cov txheej txheem plating tau ua rau lwm 10 feeb.
(4) MEA sib dhos: Cov electrode tau impregnated nrog ib tug 0.5 ml proton-conducting ionization tov (5 wt. feem pua ntawm ethanol) thiab ces plated nrog platinum.Cov tshuaj tau raug cam khwb cia los ntawm ib tug roj txhuam smear. thiab cov titanium-raws li electrode yog txuas nrog ib tug rhuab qauv yas dhos.Cov cua kub yog teem rau 60 C kom ceev cov evaporation ntawm ethanol los ntawm electrode nto.
(5) Thiab lub phaj bipolar los tsim ib pawg fais fab, 20 pawg.
2. Platinum txheej rau ntawmtitanium xav
Cov duab microscopic hauv qab no qhia cov sintered titanium fibers nrog platinum txheej. Cov fibers nyob sab nraud ntawm qhov xav tau tiv thaiv tag nrho cov txheej txheej, ib qho txiaj ntsig uas tuaj yeem piav qhia los ntawm kev faib hluav taws xob ntawm lub hauv paus tseem ceeb (cov khoom siv hluav taws xob ua haujlwm nyob nruab nrab ntawm thiab sib npaug rau ob lub txee electrodes). Cov txheej yog txaus tso cai rau lub sij hawm ntev ruaj khov adhesion ntawm platinum nanoparticles. Cov hauv qab no qhia tau hais tias micrographs ntawm platinum hais tso rau ntawm titanium plated fibers los ntawm cov txheej txheem pulse plating.
