Iridium nanostructures ezitebeekanisiibwe omu muringo gw’omutaano eziteirwe aha mesoporous tantalum oxide nizongyera aha nkora y’okutwara ebintu, emirimo y’okureetaho n’okugumaho kumara obwire buraingwa.
Ekishushani: Abacondoozi omuri South Korea na US bakozire ekikwato kisya ekya iridium catalyst ekiine okweyongyera kw’emirimo y’okuhindura oxygen kuhwera omu kuhindura amashanyarazi g’amaizi omu muringo ogutarikutwara sente nyingi n’ekirungo ky’okuhindura purotoni kubaasa kureetaho hydrogen. yega bingi
Ebyetengo by’amaani omu nsi nibigumizamu nibyeyongyera. Amashanyarazi ga haidrojeni agarikutwarwa gaine ekiraganiso kihango omu kusherura kwaitu eby’okugarukamu by’amaani agashemeire kandi agatarikuhwaho. Omu nshonga egi, ebikwato ebirikuhindura purotoni omu maizi (PEMWEs), ebirikuhindura amaani g’amashanyarazi agarengireho kuba amaani ga haidrojeni agarikutwarwa kurabira omu kuhindura amashanyarazi g’amaizi, bireetaire abantu baingi kukunda. Kwonka, okukozesa kwayo omu muringo muhango omu kuhanga haidrojeni nikuguma kuri kukye ahabw’omubaro gw’okuhinduka kw’omwika (OER) ogurikukyendeera, ekicweka kikuru ky’okuhindura amashanyarazi, n’okuremesa kw’amaani kw’ebyoma by’omuhendo nk’eby’okurya bya iridium (Ir) na ruthenium oxide omu bikwato by’amashanyarazi ni bikye. . Nahabwekyo, okukora ebikwato bya OER ebitarikutwara sente nyingi kandi ebirikukora gye munonga nikyetengyesa ahabw‘okukoresa PEMWE omu myanya mingi.

Obwire obuhweire, ekibiina ky’abacondoozi kuruga Korea n’Abamerika ekirikwebemberwa Purofesa Changho Park kuruga omu itendekyero rya Gwangju erya sayansi n’eby’obuhangwa omuri South Korea kikakora ekikwato kisya ekirikureetaho okukyendeeza aha nkora ya iridium nanostructured erikwegamira aha mesoporous tantalum oxide (Ta2O5) kurabira omu muringo gw’okukyendeeza aha nkora ya formic acid oguboneire kubaasa kutunga okucondooza okuhikire okwa PEM wa. . Okucondooza kwabo kukashohozibwa aha intaneeti ebiro 20.05.2023, kandi nikwija kushohozibwa omu kitabo kya 575 ekya Journal of Power Sources ebiro 15.08.2023.Okucondooza oku kukahandiikwa Dr. Chaekyong Baik, omucondoozi omu itendekyero rya Korea erya sayansi n’eby’obuhangwa (KIST).
“Ekicweka kya Ir ekirimu ebiriisa by’amashanyarazi nikijanjaara omu muringo gumwe aha rubaju orugumire orurimu obuhuta bwa Ta2O5 orutebeekanisiibwe omu muringo gw’okuteeraho ogwa soft template hamwe n’omuringo gw’okwehinguririza ethylenediamine, ekirikukyendeeza gye Ir eri omu battery emwe eya PEMWE kuhika ahari 0.3 mg cm-2,” nikwo Purofeesa Park yashoboorora. . Ni kikuru kumanya ngu omuringo musya gw’okukora Ir/Ta2O5 catalyst tigurikutunguura okukoresa Ir kwonka, kureka n’okugira obushoboorozi bw’okutwara amashanyarazi n’omwanya muhango gw’okukoresa amashanyarazi.
Okwongyera ahari ekyo, X-ray photoelectron na X-ray absorption spectroscopy nizooreka enkoragana y’amaani ey’ebyoma n’okuhagira ahagati ya Ir na Ta, obwo okubara kw’enteekateeka y’okukora kw’obuhango kurikworeka okutwarwa kw’eshagama kuruga ahari Ta kuza ahari Ir, ekirikureetaho okukwatira hamwe kw’amaani kw’ebintu ebirikunywanisa nka O na OH, kandi kikagumaho omu nkora ya Oring theOP(III) Eki nakyo nikirugamu okweyongyera kw’emirimo ya Ir/Ta2O5, erimu amaani makye g’okurenga 0.385 V kugyeragyeranisa na 0.48 V ahabwa IrO2.
Ekibiina eki nakyo kikayoreka omu kugyezesa omurimo gwa OER gw‘ahaiguru gw‘ekirungo ky‘okureetaho, kureeba ngu hariho amaani maingi ga 288 ± 3.9 mV ahari 10 mA cm-2 n‘omurimo gwa Ir mass gw‘ahaiguru munonga ogwa 876.1 ± 125.1 A g-1 ahari 1.55 V kuhika aha muheendo ogurikuhikaana. ahabwa Mr. Black. Omu mazima, Ir/Ta2O5 neeyoreka emirimo mirungi ya OER n‘okuhama, ekyayongyeire kuhamibwa ahabw‘eshaaha ezirikurenga 120 z‘okukora kw‘obutafaari bumwe obw‘ekibiina ky‘eby‘amashanyarazi.
Enkora etebekanisiibwe eine oburungi bwa kabiri obw‘okukyendeeza aha rurengo rw‘omugugu Ir n‘okwongyera aha bukuru bwa OER. "Okweyongyera kw'oburungi bwa OER nikuha obuhwezi aha sente z'omuringo gwa PEMWE, obwo nibutunguura okukora kwayo kwona. Okuhikiiriza oku nikubaasa kuhindura omu by'obushuubuzi bwa PEMWE n'okutunguura okugikozesa nk'omuringo gw'okukora amaizi g'omugyera," Purofeesa Park oine amatsiko nikwo arikugira. .

Okutwarira hamwe, entunguuka egi neetuhitsya haihi n’okutunga eby’okugarukamu by’okutwara amaani ga haidrojeni ebitarikuhwaho kandi obwo tukatunga omutindo gw’okutagira kaboni.
Ebikwatiraine n’eishomero rya Gwangju erya sayansi n’eby’obuhangwa (GIST) Eishomero rya Gwangju erya sayansi n’eby’obuhangwa (GIST) ni yunivasite y’okucondooza erikushangwa omuri Gwangju, South Korea. GIST ekatandikirwaho omu mwaka gwa 1993 kandi ebaire emwe aha mashomero g’ekitiinisa omuri South Korea. Yunivasite eyehaireyo kuhangaho embeera y’okucondooza ey’amaani erikutunguura entunguuka ya sayansi n’eby’obuhangwa kandi erikutunguura enkoragana ahagati y’emirimo y’okucondooza ey’ensi yoona n’ey’omu ihanga. Okukuratira omusingye “Omuhanguzi w’okwehimbisa owa sayansi na tekinologiya omu biro by’omumaisho”, GIST neeguma neeteebwa omu mwanya gw’okubanza omu yunivasite z’ahaiguru omuri South Korea.
Ebikwatiraine n’abahandiiki Dr. Changho Park atwire ari purofeesa omu itendekyero rya Gwangju erya sayansi n’eby’obuhangwa (GIST) kuruga omu kwezi kwa munaana 2016. Atakagiire omu GIST, akaba ari omuhwezi wa purezidenti wa Samsung SDI kandi akatunga diguri ya kabiri kuruga omu itendekyero rya Samsung Electronics SAIT. Akatunga diguri ze ez’okubanza, eza kabiri, n’ez’obushaho kuruga omu kitongore ky’eby’obuhangwa, omu itendekyero rya Korea erya sayansi n’eby’obuhangwa, omu mwaka gwa 1990, 1992, na 1995. Okucondooza kwe okwa hati nikuta omutima aha kuhanga ebintu ebirikuhwera omu kuteerana kw’amashanyarazi g’omubiri omu bihimba by’amajuta n’okukoresa amashanyarazi arikukoresa nanostructured carbon n’ebintu ebirikushagika eby’ekyoma ebitaine rubaju. Ahandiikire empapura 126 eza sayansi kandi atungire n’obugabe 227 omu murimo gwe ogw’obukugu.
Dr. Chaekyong Baik n’omucondoozi omu itendekyero rya Korea erya sayansi n’eby’obuhangwa (KIST). Aine akakwate n’okukora ebikwato bya PEMWE OER na MEA, kandi hati aine omutima aha bikwato n’ebikwato by’okukora ebikwato bya ammonia oxidation. Chaekyung Baik atakagiire omu KIST omu mwaka gwa 2023, akatunga diguri ye eya PhD omu kugaita amashanyarazi kuruga omu itendekyero rya Gwangju erya sayansi na tekinologiya.
Ekicweka kya mesoporous iride nanostructure ekirikuhagirwa Ta2O5 erimu ebiriisa bingi nikibaasa kwongyera aha mirimo n’okuhamya kw’okugarukamu kw’okuhinduka kw’omwika.
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