Ụdị iridium nanostructures e mere nke ọma nke a na-etinye na mesoporous tantalum oxide na-eme ka ike eletrik dịkwuo mma, na-eme ka ọrụ catalytic na nkwụsi ike ogologo oge dịkwuo mma.
Foto: Ndị nchọpụta na South Korea na US emepụtala ihe na-akpali akpali iridium ọhụrụ nke nwere mmụba na ọrụ mmeghachi omume evolushọn oxygen iji mee ka electrolysis mmiri dị ọnụ ala na-arụ ọrụ iji mepụta hydrogen. Mụtakwuo ihe
Mkpa ike ụwa na-aga n'ihu na-eto. Ike hydrogen a na-ebugharị ebugharị nwere nnukwu nkwa n'ọchịchọ anyị maka ngwọta ike dị ọcha na nke na-adịgide adịgide. N'akụkụ a, electrolysers mmiri proton exchange membrane (PEMWEs), nke na-agbanwe ike eletrik gabigara ókè ka ọ bụrụ ike hydrogen a na-ebugharị site na electrolysis mmiri, adọtala ọtụtụ mmasị. Agbanyeghị, ojiji ya buru ibu na mmepụta hydrogen ka dị oke n'ihi ọnụego nwayọ nke mmeghachi omume evolushọn oxygen (OER), akụkụ dị mkpa nke electrolysis, na nnukwu ibu nke ihe na-akpali akpali metal oxide dị oke ọnụ dị ka iridium (Ir) na ruthenium oxide n'ime electrodes dị oke. . Ya mere, mmepe nke ihe na-akpali akpali OER dị ọnụ ala ma dị elu dị mkpa maka ojiji zuru oke nke PEMWE.

N'oge na-adịbeghị anya, otu ndị nyocha Korea-American nke Prọfesọ Changho Park si Gwangju Institute of Science and Technology na South Korea duziri mepụtara ihe na-akpali akpali iridium ọhụrụ nke dabere na mesoporous tantalum oxide (Ta2O5) site na usoro mbelata formic acid ka mma iji nweta electrolysis dị irè nke mmiri PEM. E bipụtara nyocha ha n'ịntanetị na Mee 20, 2023, a ga-ebipụtakwa ya na Mpịakọta 575 nke Journal of Power Sources na Ọgọst 15, 2023. Dr. Chaekyong Baik, onye nchọpụta na Korea Institute of Science and Technology (KIST) dere ọmụmụ ihe a.
“A na-agbasasị nanostructure Ir bara ụba na elektrọn n'otu aka ahụ na substrate Ta2O5 kwụsiri ike nke e ji usoro template dị nro kwadebe yana usoro gburugburu ethylenediamine, nke na-ebelata ọdịnaya Ir nke otu batrị PEMWE nke ọma ruo 0.3 mg cm-2,” ka Prọfesọ Park kọwara. Ọ dị mkpa ịmara na nhazi ọhụrụ nke ihe na-akpali Ir/Ta2O5 abụghị naanị na ọ na-eme ka ojiji Ir ka mma, kamakwa ọ na-enwe ike ịrụ ọrụ nke ọma na nnukwu mpaghara elu electrochemical.
Tinyere nke ahụ, nyocha X-ray photoelectron na X-ray absorption spectroscopy na-egosi mmekọrịta siri ike nke nkwado ígwè n'etiti Ir na Ta, ebe mgbakọta nke ozizi ọrụ njupụta na-egosi mbufe chaja site na Ta gaa na Ir, nke na-akpata njikọ siri ike nke adsorbates dị ka O na OH, ma na-ejigide oke Ir(III) n'oge usoro oxidation OOP. Nke a na-ebute mmụba nke ọrụ Ir/Ta2O5, nke nwere obere voltaji nke 0.385 V ma e jiri ya tụnyere 0.48 V maka IrO2.
Ndị otu ahụ gosikwara ọrụ OER dị elu nke ihe mkpali ahụ site na nnwale, na-ahụ oke voltaji nke 288 ± 3.9 mV na 10 mA cm-2 na oke ọrụ Ir dị elu nke 876.1 ± 125.1 A g-1 na 1.55 V ruo uru kwekọrọ. maka Maazị Black. N'ezie, Ir/Ta2O5 gosipụtara ọrụ OER dị mma na nkwụsi ike, nke ihe karịrị awa 120 nke ọrụ otu mkpụrụ ndụ nke mgbakọ membrane-electrode kwadoro.
Usoro a tụrụ aro nwere uru abụọ nke ibelata ọkwa ibu Ir na ịbawanye arụmọrụ nke OER. "Mmụba arụmọrụ nke OER na-eme ka arụmọrụ ọnụ ahịa nke usoro PEMWE dịkwuo mma, si otú a na-eme ka arụmọrụ ya zuru oke ka mma. Mmezu a nwere ike ịgbanwe azụmaahịa nke PEMWE ma mee ka nnabata ya dị ngwa dị ka usoro mmepụta hydrogen bụ isi," ka Prọfesọ Park na-atụ aro.

N'ozuzu, mmepe a na-eme ka anyị bịaruo nso n'inweta ngwọta mbugharị ike hydrogen na-adịgide adịgide ma si otú a nweta ọnọdụ na-anọpụ iche na carbon.
Banyere Gwangju Institute of Science and Technology (GIST) Gwangju Institute of Science and Technology (GIST) bụ mahadum nyocha dị na Gwangju, South Korea. E hiwere GIST na 1993 ma ghọọ otu n'ime ụlọ akwụkwọ kacha ewu ewu na South Korea. Mahadum ahụ na-agba mbọ ịmepụta gburugburu nnyocha siri ike nke na-akwalite mmepe nke sayensị na teknụzụ ma na-akwalite mmekorita n'etiti ọrụ nyocha mba ụwa na nke obodo. N'ịgbaso ụkpụrụ "Onye ji Sayensị na Teknụzụ nke Ọdịnihu" na-agbaso, GIST na-esonye na mahadum kachasị elu na South Korea.
Banyere Ndị Dere Akwụkwọ Dr. Changho Park abụrụla prọfesọ na Gwangju Institute of Science and Technology (GIST) kemgbe Ọgọst 2016. Tupu ọ banye na GIST, ọ rụrụ ọrụ dị ka osote onyeisi oche nke Samsung SDI ma nweta akara ugo mmụta Master na Samsung Electronics SAIT. O nwetara akara ugo mmụta bachelor, master, na doctorate ya site na Ngalaba Kemistri, Korea Institute of Science and Technology, na 1990, 1992, na 1995, n'otu n'otu. Nnyocha ya ugbu a na-elekwasị anya na mmepe nke ihe ndị na-eme ka ihe dị ka ihe na-eme ka ihe dị iche iche dị na membrane electrode na sel mmanụ na electrolysis site na iji nanostructured carbon na mixed metal oxide supports. O bipụtala akwụkwọ sayensị 126 ma nata ikike ikike 227 na ngalaba ọkachamara ya.
Dr. Chaekyong Baik bụ onye nyocha na Korea Institute of Science and Technology (KIST). Ọ na-etinye aka na mmepe nke PEMWE OER na MEA catalyst, na-elekwasị anya ugbu a na catalyst na ngwaọrụ maka mmeghachi omume oxidation ammonia. Tupu ọ sonyere KIST na 2023, Chaekyung Baik nwetara PhD ya na Energy Integration site na Gwangju Institute of Science and Technology.
Nanostructure mesoporous iride nke Ta2O5 bara ọgaranya na electron na-akwado nwere ike ime ka ọrụ na nkwụsi ike nke mmeghachi omume evolushọn oxygen dịkwuo mma.
Ndị dere akwụkwọ a na-ekwupụta na ha enweghị mmasị ego ma ọ bụ mmekọrịta onwe onye nke nwere ike iyi ka ọ na-emetụta ọrụ e depụtara n'isiokwu a.
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