Magadzirirwo e iridium nanostructures akagadzirwa zvakanaka akaiswa pa mesoporous tantalum oxide anowedzera conductivity, catalytic activity uye kugadzikana kwenguva refu.
Mufananidzo: Vatsvaguriri muSouth Korea neUS vakagadzira chinhu chitsva che iridium catalyst chine kuwedzera kwekuita kwe oxygen evolution reaction kuti zvibatsire electrolysis yemvura isingadhuri neproton exchange membrane kugadzira hydrogen. Dzidza zvakawanda
Kudiwa kwesimba repasi rose kuri kuramba kuchikura. Simba rehydrogen rinotakurwa rine vimbiso huru mukutsvaga kwedu mhinduro dzesimba rakachena uye rinogara kwenguva refu. Panyaya iyi, maelectrolysers emvura eproton exchange membrane (PEMWEs), ayo anoshandura simba remagetsi rakawandisa kuita simba rehydrogen rinotakurwa kuburikidza neelectrolysis yemvura, akwezva kufarira kukuru. Zvisinei, kushandiswa kwayo kukuru mukugadzirwa kwehydrogen kuchiri kushoma nekuda kwekunonoka kwe oxygen evolution reaction (OER), chikamu chakakosha che electrolysis, uye kurodha kwakawanda kwe metal oxide catalysts dzinodhura dzakadai se iridium (Ir) ne ruthenium oxide muma electrodes kwakaganhurirwa. . Nokudaro, kugadzirwa kwe OER catalysts dzinoshanda uye dzinoshanda zvakanyanya kwakakosha kuti PEMWE ishandiswe zvakanyanya.

Munguva pfupi yapfuura, chikwata chekutsvagisa cheKorea-America chakatungamirwa naProfessor Changho Park wekuGwangju Institute of Science and Technology muSouth Korea chakagadzira chinhu chitsva che iridium nanostructured catalyst chakavakirwa pa mesoporous tantalum oxide (Ta2O5) kuburikidza nenzira yakavandudzwa yekuderedza formic acid kuti vawane electrolysis inoshanda yePEM water. . Tsvagiridzo yavo yakaburitswa online musi wa20 Chivabvu, 2023, uye ichaburitswa muVhoriyamu 575 yeJournal of Power Sources musi wa15 Nyamavhuvhu, 2023. Chidzidzo ichi chakanyorwa pamwe chete naDr. Chaekyong Baik, muongorori paKorea Institute of Science and Technology (KIST).
"Mugadziro weIr nanostructure wakapfuma mumaerekitironi wakapararira zvakaenzana pane substrate yeTa2O5 ine mesoporous yakagadzirwa nenzira ye soft template pamwe chete ne ethylenediamine yakakomberedza maitiro, izvo zvinoderedza zviri mukati meIr yebhatiri rePEMWE rimwe chete kusvika ku0.3 mg cm-2," akatsanangura Professor Park. . Zvakakosha kuziva kuti dhizaini itsva yeIr/Ta2O5 catalyst haingogadzirise kushandiswa kweIr chete, asiwo ine conductivity yakakwira uye nzvimbo yakakura inoshanda ne electrochemical.
Pamusoro pezvo, X-ray photoelectron uye X-ray absorption spectroscopy zvinoratidza kubatana kwakasimba kwesimbi pakati peIr naTa, nepo density functional theory calculations ichiratidza kutumirwa kwechaji kubva kuTa kuenda kuIr, izvo zvinokonzera kubatana kwakasimba kweadsorbates senge O naOH, uye inochengetedza chiyero cheIr(III) panguva yekushanda kweOOP oxidation. Izvi zvinozoguma nekuwedzera kwekushanda kweIr/Ta2O5, iyo ine overvoltage yakaderera ye0.385 V zvichienzaniswa ne0.48 V yeIrO2.
Chikwata ichi chakaratidzawo nekuyedza kushanda kweOER yakakwira yecatalyst, vachiona overvoltage ye288 ± 3.9 mV pa10 mA cm-2 uye Ir mass activity yakakwira zvikuru ye876.1 ± 125.1 A g-1 pa1.55 V kusvika pamutengo unoenderana naVaBlack. Kutaura zvazviri, Ir/Ta2O5 inoratidza kushanda kweOER kwakanaka uye kugadzikana, izvo zvakasimbiswazve nemaawa anopfuura 120 ekushanda kwemasero rimwe chete e membrane-electrode assembly.
Nzira iyi ine zvakanakira zviviri zvekuderedza mutoro weIr uye kuwedzera kushanda zvakanaka kweOER. "Kuwedzera kushanda zvakanaka kweOER kunowedzera kushanda zvakanaka kwePEMWE, nokudaro zvichivandudza kushanda kwayo kwose. Kubudirira uku kunogona kuchinja kutengeserana kwePEMWE uye kukurumidzisa kushandiswa kwayo senzira huru yekugadzira hydrogen," anodaro Professor Park ane tariro.

Zvose zviri kuitika, budiriro iyi inotiswededza pedyo nekuwana mhinduro dzinogara kwenguva refu dzekufambisa simba rehydrogen uye nokudaro tichiwana mukana wekusashandisa kabhoni.
Nezve Gwangju Institute of Science and Technology (GIST) Gwangju Institute of Science and Technology (GIST) yunivhesiti yekutsvagisa iri muGwangju, South Korea. GIST yakavambwa muna 1993 uye yava chimwe chezvikoro zvine mukurumbira muSouth Korea. Yunivhesiti iyi yakazvipira kugadzira nzvimbo yakasimba yekutsvagisa inokurudzira kukura kwesainzi netekinoroji uye kukurudzira kushandira pamwe pakati pemapurojekiti ekutsvagisa epasi rose neemuno. Ichitevedzera chirevo chekuti "Proud Shaper of Science and Technology of the Remangwana", GIST inogara iri pakati pemayunivhesiti ane chinzvimbo chepamusoro muSouth Korea.
NezveVanyori Dr. Changho Park anga ari purofesa paGwangju Institute of Science and Technology (GIST) kubvira Nyamavhuvhu 2016. Asati ajoina GIST, akashanda seMutevedzeri weMutungamiriri weSamsung SDI uye akawana dhigirii reMasters kubva kuSamsung Electronics SAIT. Akawana madhigirii ake eBachelor's, Master's, uye Doctorate kubva kuDhipatimendi reChemistry, Korea Institute of Science and Technology, muna 1990, 1992, uye 1995, zvichiteerana. Tsvagiridzo yake yazvino inotarisa pakugadzirwa kwezvinhu zvinokonzeresa ma electrode assemblys mumasero emafuta uye electrolysis achishandisa nanostructured carbon uye mixed metal oxide supports. Akaburitsa mapepa esainzi zana nemakumi maviri nematanhatu uye akagamuchira ma patent mazana maviri nemakumi maviri nenomwe mubasa rake rehunyanzvi.
Dr. Chaekyong Baik muongorori paKorea Institute of Science and Technology (KIST). Anobatanidzwa mukugadzirwa kwePEMWE OER neMEA catalysts, achinyanya kutarisa macatalysts nemidziyo yeammonia oxidation reactions. Asati ajoina KIST muna 2023, Chaekyung Baik akawana PhD yake muEnergy Integration kubva kuGwangju Institute of Science and Technology.
Muumbirwo we mesoporous iride unotsigirwa neTa2O5 ine maerekitironi akawanda unogona kuwedzera kushanda uye kugadzikana kwekuita kwekushanduka kweokisijeni.
Vanyori vanoti havana hukama hwemari kana hukama hwevanhu hunogona kunge hwakaita sehunopesvedzera basa rataurwa munyaya ino.
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