Cov qauv iridium tshwj xeeb uas tau tsim tshwj xeeb tso rau ntawm mesoporous tantalum oxide txhim kho kev ua haujlwm, kev ua haujlwm catalytic thiab kev ruaj khov mus sij hawm ntev.
Duab: Cov kws tshawb fawb hauv Kaus Lim Qab Teb thiab Tebchaws Meskas tau tsim cov tshuaj catalyst iridium tshiab nrog kev ua haujlwm ntawm cov pa oxygen kom pab txhawb kev siv hluav taws xob ntawm dej nrog lub membrane pauv proton los tsim hydrogen. kawm ntxiv
Lub ntiaj teb cov kev xav tau zog txuas ntxiv mus. Lub zog hydrogen uas thauj tau muaj kev cog lus zoo hauv peb txoj kev tshawb nrhiav cov kev daws teeb meem zog huv thiab ruaj khov. Hauv qhov no, cov tshuab electrolysers dej proton pauv (PEMWEs), uas hloov cov zog hluav taws xob ntau dhau mus ua lub zog hydrogen thauj tau los ntawm dej electrolysis, tau nyiam ntau qhov kev txaus siab. Txawm li cas los xij, nws daim ntawv thov loj hauv kev tsim hydrogen tseem txwv vim yog qhov qeeb ntawm cov tshuaj tiv thaiv oxygen evolution (OER), ib qho tseem ceeb ntawm electrolysis, thiab kev thauj khoom ntau ntawm cov hlau oxide catalysts kim xws li iridium (Ir) thiab ruthenium oxide rau hauv cov electrodes yog txwv. . Yog li ntawd, kev tsim cov catalysts OER uas pheej yig thiab ua tau zoo yog qhov tsim nyog rau kev siv dav dav ntawm PEMWE.

Tsis ntev los no, pab pawg tshawb fawb Kauslim-Asmeskas uas coj los ntawm Xibfwb Changho Park los ntawm Gwangju Lub Tsev Kawm Ntawv ntawm Kev Tshawb Fawb thiab Kev Siv Tshuab hauv Kaus Lim Qab Teb tau tsim cov tshuaj catalyst iridium nanostructured tshiab raws li mesoporous tantalum oxide (Ta2O5) los ntawm kev txhim kho txoj kev txo cov kua qaub formic kom ua tiav cov dej PEM electrolysis zoo. . Lawv txoj kev tshawb fawb tau luam tawm hauv online thaum Lub Tsib Hlis 20, 2023, thiab yuav luam tawm hauv Ntawv 575 ntawm Journal of Power Sources thaum Lub Yim Hli 15, 2023. Txoj kev tshawb fawb tau sau los ntawm Dr. Chaekyong Baik, tus kws tshawb fawb ntawm Korea Institute of Science and Technology (KIST).
"Cov electron-rich Ir nanostructure yog uniformly dispersed rau ntawm ib qho ruaj khov mesoporous Ta2O5 substrate npaj los ntawm cov qauv mos mos ua ke nrog cov txheej txheem ethylenediamine nyob ib puag ncig, uas ua rau cov ntsiab lus Ir ntawm ib lub roj teeb PEMWE mus rau 0.3 mg cm-2," piav qhia Professor Park. . Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov kev tsim kho tshiab ntawm Ir / Ta2O5 catalyst tsis yog tsuas yog txhim kho Ir siv, tab sis kuj muaj conductivity siab dua thiab thaj chaw electrochemically active loj dua.
Tsis tas li ntawd xwb, X-ray photoelectron thiab X-ray absorption spectroscopy qhia txog kev sib cuam tshuam ntawm cov hlau-txhawb nqa ntawm Ir thiab Ta, thaum kev suav cov kev xav txog kev ua haujlwm ntawm qhov ceev qhia txog kev hloov pauv ntawm Ta mus rau Ir, uas ua rau muaj kev sib txuas ntawm cov adsorbates xws li O thiab OH, thiab tswj hwm Ir (III) piv thaum lub sijhawm OOP oxidation. Qhov no ua rau muaj kev ua haujlwm ntau ntxiv ntawm Ir / Ta2O5, uas muaj qhov hluav taws xob qis dua ntawm 0.385 V piv rau 0.48 V rau IrO2.
Pab neeg kuj tau sim ua qauv qhia txog kev ua haujlwm OER siab ntawm cov catalyst, pom qhov overvoltage ntawm 288 ± 3.9 mV ntawm 10 mA cm-2 thiab qhov ua haujlwm loj Ir ntawm 876.1 ± 125.1 A g-1 ntawm 1.55 V rau tus nqi sib xws. rau Mr. Black. Qhov tseeb, Ir/Ta2O5 qhia txog kev ua haujlwm OER zoo heev thiab kev ruaj khov, uas tau lees paub ntxiv los ntawm ntau dua 120 teev ntawm kev ua haujlwm ib lub cell ntawm lub rooj sib dhos membrane-electrode.
Txoj kev uas tau muab tso tawm no muaj ob qho txiaj ntsig ntawm kev txo qhov hnyav Ir thiab ua kom OER ua haujlwm tau zoo dua. "Kev ua haujlwm tau zoo ntawm OER ua kom tiav qhov kev siv nyiaj tau zoo ntawm PEMWE cov txheej txheem, yog li txhim kho nws cov kev ua tau zoo tag nrho. Qhov kev ua tiav no tuaj yeem hloov pauv kev lag luam ntawm PEMWE thiab ua kom nws siv tau sai dua li txoj kev tsim cov hydrogen," tus xibfwb Park hais.

Zuag qhia tag nrho, qhov kev txhim kho no coj peb los ze zog rau kev ua tiav cov kev daws teeb meem kev thauj mus los hydrogen uas ruaj khov thiab yog li ua tiav cov xwm txheej tsis muaj carbon.
Txog Gwangju Lub Tsev Kawm Ntawv Qib Siab Kev Tshawb Fawb thiab Kev Siv Tshuab (GIST) Gwangju Lub Tsev Kawm Ntawv Qib Siab Kev Tshawb Fawb thiab Kev Siv Tshuab (GIST) yog ib lub tsev kawm ntawv tshawb fawb nyob hauv Gwangju, Kaus Lim Qab Teb. GIST tau tsim muaj xyoo 1993 thiab tau dhau los ua ib lub tsev kawm ntawv muaj koob muaj npe tshaj plaws hauv Kaus Lim Qab Teb. Lub tsev kawm ntawv tau cog lus los tsim kom muaj ib puag ncig kev tshawb fawb zoo uas txhawb nqa kev txhim kho kev tshawb fawb thiab kev siv tshuab thiab txhawb nqa kev koom tes ntawm cov haujlwm tshawb fawb thoob ntiaj teb thiab hauv tsev. Ua raws li cov lus hais "Tus Tsim Kev Tshawb Fawb thiab Kev Siv Tshuab Yav Tom Ntej", GIST tau raug xaiv tsa tas li ntawm cov tsev kawm ntawv qib siab hauv Kaus Lim Qab Teb.
Txog Cov Kws Sau Ntawv Dr. Changho Park tau ua ib tug xibfwb qhia ntawv ntawm Gwangju Institute of Science and Technology (GIST) txij li lub Yim Hli 2016. Ua ntej koom nrog GIST, nws tau ua haujlwm ua Tus Lwm Thawj Coj ntawm Samsung SDI thiab tau txais daim ntawv kawm tiav Master's degree los ntawm Samsung Electronics SAIT. Nws tau txais nws daim bachelor's, master's, thiab doctorate degrees los ntawm Department of Chemistry, Korea Institute of Science and Technology, xyoo 1990, 1992, thiab 1995, raws li. Nws txoj kev tshawb fawb tam sim no tsom mus rau kev tsim cov khoom siv catalytic rau cov khoom sib dhos membrane electrode hauv cov roj cell thiab electrolysis siv nanostructured carbon thiab mixed metal oxide supports. Nws tau luam tawm 126 daim ntawv tshawb fawb thiab tau txais 227 patents hauv nws qhov kev txawj ntse.
Dr. Chaekyong Baik yog ib tug kws tshawb fawb ntawm Korea Institute of Science and Technology (KIST). Nws koom nrog kev tsim cov PEMWE OER thiab MEA catalysts, nrog rau kev tsom mus rau cov catalysts thiab cov khoom siv rau cov tshuaj ammonia oxidation. Ua ntej koom nrog KIST hauv xyoo 2023, Chaekyung Baik tau txais nws daim PhD hauv Energy Integration los ntawm Gwangju Institute of Science and Technology.
Lub mesoporous iride nanostructure txhawb nqa los ntawm electron-nplua nuj Ta2O5 tuaj yeem txhim kho kev ua haujlwm thiab kev ruaj khov ntawm cov tshuaj tiv thaiv oxygen evolution.
Cov kws sau ntawv tshaj tawm tias lawv tsis muaj kev sib tw nyiaj txiag lossis kev sib raug zoo ntawm tus kheej uas yuav zoo li cuam tshuam rau txoj haujlwm uas tau nthuav tawm hauv tsab xov xwm no.
Lus Ceeb Toom: AAAS thiab EurekAlert! tsis yog lub luag haujlwm rau qhov tseeb ntawm cov ntawv xov xwm tshaj tawm hauv EurekAlert! Txhua qhov kev siv cov ntaub ntawv los ntawm ib lub koom haum koom nrog lossis los ntawm EurekAlert system.

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