Ivyo bikoresho vy’i iridium vyakozwe mu buryo budasanzwe bishizwe ku mfuruka y’ivyuma bita tantalum oxide bituma ubushobozi bwo gutwara umuyagankuba, ubushobozi bwo gutuma ibintu bigenda neza be n’ugushikama kw’igihe kirekire.
Ishusho: Abashakashatsi bo muri Koreya y’Epfo no muri Amerika barateguye ikintu gishasha gitera iridium gifise ubushobozi bwo guhindura umwuka w’ikirere kugira ngo bishobore gutuma amazi akoreshwa n’umuyagankuba akoresheje ubuhinga bwo guhindura porotone kugira ngo haboneke hydrogène. menya vyinshi
Ivyo isi ikeneye vy’inguvu birabandanya kwiyongera. Inguvu z’iyidrojeni zitwarwa zifise umuhango munini mu kurondera inyishu z’inguvu zisukuye kandi ziramvye. Ku bijanye n’ivyo, amaporotoni ahindura amazi (PEMWEs), ahindura inguvu z’umuyagankuba zirenze urugero zikaba inguvu z’iyidrojeni zishobora gutwarwa biciye ku guhindura amazi, yarakwegereye abantu benshi. Ariko rero, ugukoreshwa kwayo ku rugero runini mu guhingura ivyuma biguma ari bike kubera urugero ruto rw’uguhinduka kw’umwuka (OER), igice gihambaye c’uguhindura ivyuma, kandi n’ugushiramwo ivyuma bizimvye nk’iridium (Ir) na ruthenium oxide mu bikoresho vy’amashanyarazi birake. . Ku bw’ivyo, ugutegura ibikoresho vy’ubuhinga bwa OER bitazimvye kandi bikora neza cane ni ngombwa kugira ngo PEMWE ikoreshwe cane.

Vuba aha, umugwi w’abashakashatsi bo muri Koreya n’Abanyamerika uyobowe na Porofeseri Changho Park wo mu kigo ca Gwangju c’ubuhinga n’ubuhinga muri Koreya y’Epfo, warateguye igikoresho gishasha c’ubuhinga bwa iridium nanostructured catalyst gishingiye ku mesoporous tantalum oxide (Ta2O5) biciye ku buryo bwo kugabanya aside formique kugira ngo haboneke ubuhinga bwiza bwo gukoresha umuyagankuba wa PEM wa. . Ubushakashatsi bwabo bwasohowe kuri internet kw’igenekerezo rya 20 Rusama 2023, kandi buzosohoka mu gitabu ca 575 c’ikinyamakuru Journal of Power Sources kw’igenekerezo rya 15 Myandagaro 2023. Ubu bushakashatsi bwanditswe na Dogiteri Chaekyong Baik, umushakashatsi wo mu kigo ca Koreya c’ubuhinga n’ubuhinga (KIST).
Porofeseri Park yasiguye ati: “Ico gice c’umubiri citwa Ir gifise ama electrons gishitse mu buryo bumwe ku gice gikomeye c’ivyuma bita Ta2O5 giteguwe hakoreshejwe uburyo bw’ivyuma vyoroshe bifatanijwe n’uburyo bwo gukikuza ethylenediamine, ivyo bikaba bigabanya neza Ir iri muri bateri imwe ya PEMWE ikagera kuri 0,3 mg cm-2.” . Ni ngombwa kumenya ko ubuhinga bushasha bw’igikoresho co gutuma Ir/Ta2O5 butera imbere butatuma gusa Ir ikoreshwa neza, ariko kandi bufise ubushobozi bwo gutwara umuyagankuba kandi bufise uburebure buhambaye bw’ubutaka bukorana n’umuyagankuba.
Ikindi, imishwarara ya X photoelectron n’imishwarara ya X absorption spectroscopy yerekana imigenderanire ikomeye y’ivyuma hagati ya Ir na Ta, mu gihe imibare y’ivyiyumviro vy’imikorere y’uburemere yerekana ko umuyagankuba uva kuri Ta uja kuri Ir, ivyo bikaba bituma ivyuma bifatanya cane nk’ivyo O na OH bifatanya, kandi bikaguma bikorana n’igipimo ca O Ivyo navyo bituma Ir/Ta2O5 igira ubushobozi bwo gukora cane, ikaba ifise ubushobozi buke cane bwa 0.385 V ugereranyije na 0.48 V bwa IrO2.
Iryo tsinda kandi ryerekanye mu buryo bw’igerageza igikorwa kinini ca OER c’igikoresho gitera umuriro, kibona ko umuriro urengeje urugero wa 288 ± 3,9 mV ku 10 mA cm-2 n’igikorwa c’uburemere bwa Ir gikomeye cane ca 876,1 ± 125,1 A g-1 ku 1,55 V ku gaciro kahuye. ku bwa Bwana Black. Nkako, Ir/Ta2O5 yerekana igikorwa ciza cane ca OER n’ugushikama, ivyo bikaba vyaremejwe kandi n’amasaha arenga 120 y’ugukora kw’ingingo imwe y’iteraniro ry’ivyuma vy’ivyuma.
Uburyo bushikirijwe burafise akamaro kabiri ko kugabanya urugero rw’umuzigo Ir no kwongera ubushobozi bwa OER. "Ukwo kwongerekana kw'ubushobozi bwa OER kuratuma ubuhinga bwa PEMWE bugenda neza, gutyo bigatuma bukora neza muri rusangi. Ivyo bishobora guhindura cane ubudandaji bwa PEMWE no kwihutisha kwemerwa nk'uburyo busanzwe bwo guhingura ivyuma vy'amazi," ni ko Porofeseri Park afise icizigiro avuga. .

Muri rusangi, iyo nzira iratuma twegeranya gushika ku mirongo ngenderwako y’ugutwara inguvu z’iyidrojeni ziramvye, gutyo tugashika ku rwego rwo kutagira aho rugarukira.
Ivyerekeye Ishure ry’ubuhinga n’ubuhinga ry’i Gwangju (GIST) Ishure ry’ubuhinga n’ubuhinga ry’i Gwangju (GIST) ni kaminuza y’ubushakashatsi iri i Gwangju muri Koreya y’Epfo. GIST yashinzwe mu mwaka w’1993, ikaba ari rimwe mu mashure azwi cane muri Koreya y’Epfo. Iyo kaminuza yiyemeje gutuma haba ubushakashatsi bukomeye butera imbere mu vy’ubuhinga n’ubuhinga bwa none, kandi butera imbere mu gukorana hagati y’imigambi y’ubushakashatsi mpuzamakungu n’iyo mu gihugu. Kubera ko GIST yubahiriza icivugo kivuga ngo “Umuhinguzi w’ubuhinga n’ubuhinga bwo muri kazoza”, iguma iri ku rutonde rwa kaminuza zihambaye muri Koreya y’Epfo.
Ivyerekeye abanditsi Dogiteri Changho Park yari umwigisha mw’ishure ry’ubuhinga n’ubuhinga ry’i Gwangju (GIST) kuva mu kwezi kwa munani 2016. Imbere y’uko yinjira muri GIST, yari umuyobozi wungirije wa Samsung SDI, kandi yararonse impapuro z’umutsindo z’ubuhinga bwa none muri Samsung Electronics SAIT. Yaronse impapuro z’umutsindo z’icigwa ca mbere, ica kabiri n’ica doctorat mu gisata c’ubuhinga bwa shimi, mu kigo ca siyansi n’ubuhinga bwa none co muri Koreya, mu 1990, 1992 no mu 1995. Ubushakashatsi bwiwe ubu bwibanda ku gutegura ibikoresho bishobora gutuma amashanyarazi akora neza mu bikoresho vy’amavuta n’amashanyarazi akoresheje ivyuma bifise ubuhinga bwa nanostructured carbon be n’ivyuma bivanze. Yasohoye impapuro 126 z’ubuhinga, kandi yararonse uburenganzira 227 bwo gukora ivyo akora.
Dogiteri Chaekyong Baik ni umushakashatsi mu kigo ca Koreya c’ubuhinga n’ubuhinga (KIST). Arafise uruhara mu gutegura ibikoresho bitera umuriro vya PEMWE OER na MEA, ubu akaba yibanze ku bikoresho bitera umuriro n’ibikoresho vyo gutuma umuriro uhinduka. Imbere y’uko yinjira muri KIST mu 2023, Chaekyung Baik yararonse impamyabushobozi yiwe y’icigwa ca PhD mu bijanye n’ugushiramwo inguvu mu kigo ca Gwangju c’ubuhinga n’ubuhinga.
Ivyo bihimba vy’umubiri bishigikiwe na Ta2O5 ifise ubutunzi bw’ama electrons birashobora kwongereza igikorwa n’ugushikama kw’ihinduka ry’umwuka w’ikirere.
Abanditsi bamenyesha ko ata nyungu z’amahera canke imigenderanire y’abantu bashobora gusa n’iyigira ico ikoze ku gikorwa cashikirijwe muri iki kiganiro.
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