Ko ngā hanganga nano iridium i hoahoatia motuhake kua whakatakotoria ki runga i te waikura tantalum mesoporous ka whakarei ake i te kawe hiko, te ngohe catalytic me te pumau mo te wa roa.
Whakaahua: Kua whakawhanakehia e ngā kairangahau i Kōrea ki te Tonga me te US tētahi whakakorikori iridium hou me te kaha o te tauhohenga whanaketanga hāora hei whakahaere i te electrolysis utu-whai hua o te wai me te membrane whakawhiti proton hei whakaputa hauwai. ako atu
Kei te piki haere tonu ngā hiahia pūngao o te ao. He nui te tūmanako mō te pūngao hauwai kawe i roto i tā tātou rapunga mō ngā otinga pūngao ma, pumau hoki. I tēnei whakaaro, kua nui te aro ki ngā taputapu hiko wai membrane whakawhiti proton (PEMWE), e huri ana i te pūngao hiko nui ki te pūngao hauwai kawe mā te hiko wai. Heoi, he iti tonu te whakamahinga nui o tēnei mea i roto i te hanga hauwai nā te puhoi o te tauhohenga whanaketanga hāora (OER), he wāhanga nui o te hiko, ā, he iti te utaina o ngā whakakorikori waikura utu nui pērā i te iridium (Ir) me te waikura ruthenium ki roto i ngā irahiko. Nō reira, he mea tika te whakawhanake i ngā whakakorikori OER utu-whai hua me te mahi-teitei mō te whakamahinga whānui o te PEMWE.

Nō nā tata nei, i whakawhanakehia e tētahi rōpū rangahau Kōrea-Amerika, i arahina e Ahorangi Changho Park o te Whare Wānanga Pūtaiao me te Hangarau o Gwangju i Kōrea ki te Tonga, tētahi whakakorikori nanostructured iridium hou i ahu mai i te waikura tantalum mesoporous (Ta2O5) mā te tikanga whakaiti waikawa formic kua whakapaitia hei whakatutuki i te electrolysis whai hua o te wai PEM. I whakaputaina ā-ipurangi tā rātou rangahau i te 20 o Mei, 2023, ā, ka whakaputaina ki te Pukapuka 575 o te Journal of Power Sources i te 15 o Ākuhata, 2023. Nā Tākuta Chaekyong Baik, he kairangahau i te Whare Wānanga Pūtaiao me te Hangarau o Korea (KIST) i tuhi tahi te rangahau.
"Ko te hanganga nano Ir whai-irahiko ka marara ōrite ki runga i tētahi papa Ta2O5 mesoporous pumau i whakaritea mā te tikanga tauira ngohengohe me te tukanga karapoti ethylenediamine, e whakaiti ana i te ihirangi Ir o tētahi pākahiko PEMWE kotahi ki te 0.3 mg cm-2," te whakamārama a Ahorangi Park. . He mea nui kia mōhio ko te hoahoa auaha o te whakakorikori Ir/Ta2O5 ehara i te mea ka whakapai ake i te whakamahinga Ir anake, engari he nui ake te kawe hiko me te horahanga mata hikohiko nui ake.
Hei tāpiritanga, e whakaatu ana te irahiko whakaahua hihi-X me te irahiko mimiti hihi-X i ngā taunekeneke tautoko-konganuku kaha i waenga i a Ir me Ta, ko ngā tātaitanga ariā mahi kiato e tohu ana i te whakawhiti utu mai i Ta ki Ir, e hua ai te here kaha o ngā adsorbates pēnei i te O me te OH, ā, e pupuri ana i te ōwehenga Ir(III) i te wā o te tukanga waikura OOP. Nā tēnei ka hua ake te pikinga o te mahi a Ir/Ta2O5, he iti ake te ngaohiko o runga o te 0.385 V ki te whakaritea ki te 0.48 V mō IrO2.
I whakaatuhia hoki e te tīma te kaha OER teitei o te whakakorikori, me te kite i te kaha nui o te 288 ± 3.9 mV i te 10 mA cm-2 me te kaha papatipu Ir tino teitei o te 876.1 ± 125.1 A g-1 i te 1.55 V ki te uara e rite ana. mō Mr. Black. Inaa, he tino pai te kaha OER me te pumau o Ir/Ta2O5, i whakaūtia anō e te neke atu i te 120 hāora o te mahi pūtau-kotahi o te huihuinga membrane-electrode.
He rua ngā painga o te tikanga kua whakaarohia, arā, ko te whakaiti i te taumata kawenga Ir me te whakanui ake i te whai huatanga o te OER. "Ko te pikinga ake o te whai huatanga o te OER ka tautoko i te whai huatanga utu o te tukanga PEMWE, ā, ka whakapai ake i tana mahi whānui. Mā tēnei whakatutukitanga ka huri i te hokohoko o te PEMWE me te tere ake i tōna whakamahinga hei tikanga whakaputa hauwai matua," te whakaaro a Ahorangi Park, he tangata hihiri.

I te nuinga o te wā, mā tēnei whanaketanga ka tata atu tātou ki te whakatutuki i ngā otinga kawe pūngao hauwai pumau, ā, ka tutuki ai te tūnga waro-kore.
Mō te Whare Wānanga Pūtaiao me te Hangarau o Gwangju (GIST) Ko te Whare Wānanga Pūtaiao me te Hangarau o Gwangju (GIST) he whare wānanga rangahau kei Gwangju, Kōrea ki te Tonga. I whakatūria a GIST i te tau 1993, ā, kua noho hei tētahi o ngā kura rongonui o Kōrea ki te Tonga. E whakapau kaha ana te whare wānanga ki te waihanga i tētahi taiao rangahau kaha e whakatairanga ana i te whanaketanga o te pūtaiao me te hangarau, me te whakatairanga i te mahi tahi i waenga i ngā kaupapa rangahau o te ao me te motu. I runga i te pepeha "He Kaiwhakaahua Whakahīhī o te Pūtaiao me te Hangarau o te Ao kei te heke mai", kei roto tonu a GIST i ngā whare wānanga tino pai o Kōrea ki te Tonga.
Mō ngā Kaituhi He ahorangi a Tākuta Changho Park i te Whare Wānanga Pūtaiao me te Hangarau o Gwangju (GIST) mai i Ākuhata 2016. I mua i tana whakaurunga ki te GIST, i mahi ia hei Perehitini Tuarua mō Samsung SDI, ā, i whiwhi i te tohu Paerua mai i Samsung Electronics SAIT. I whiwhi ia i ana tohu paetahi, paerua, me te tohu tākuta mai i te Tari Matū, Te Whare Wānanga Pūtaiao me te Hangarau o Korea, i te tau 1990, 1992, me te 1995. Ko tana rangahau o nāianei e aro ana ki te whakawhanaketanga o ngā rauemi whakatere mō ngā huihuinga irahiko kiriuhi i roto i ngā pūtau wahie me te hikohiko mā te whakamahi i te waro nanostructured me ngā tautoko waikura whakarewa whakauru. Kua whakaputa ia i te 126 ngā pepa pūtaiao, ā, kua whiwhi ia i te 227 ngā patent i roto i tana mara tohungatanga.
He kairangahau a Tākuta Chaekyong Baik i te Korea Institute of Science and Technology (KIST). Kei te whai wāhi ia ki te whakawhanake i ngā whakakorikori PEMWE OER me MEA, me te arotahi o nāianei ki ngā whakakorikori me ngā taputapu mō ngā tauhohenga whakakōkī haukini. I mua i tana urunga ki KIST i te tau 2023, i whiwhi a Chaekyung Baik i tana PhD i roto i te Whakaurunga Pūngao mai i te Gwangju Institute of Science and Technology.
Ka taea e te hanganga nano iride mesoporous e tautokona ana e te Ta2O5 whai-irahiko te whakarei ake i te ngohe me te pumau o te tauhohenga whanaketanga hāora.
E kī ana ngā kaituhi kāore i te mōhiotia he pānga pūtea whakataetae, he whanaungatanga whaiaro rānei ō rātou e whai pānga ana ki te mahi i whakatakotoria i roto i tēnei tuhinga.
Whakakape: Kāore a AAAS me EurekAlert! e whai kawenga mō te tika o ngā panuitanga pāpāho kua whakaputaina ki EurekAlert! Te whakamahinga o ngā mōhiohio e tētahi whakahaere whai wāhi mai, mā te pūnaha EurekAlert rānei.

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