I-KANAZAWA, eJapan, nge-8 kaJuni 2023 /PRNewswire/ — Abaphandi beYunivesithi yaseKanazawa baxela indlela umaleko obhityileyo kakhulu we-tin disulfide ongasetyenziswa ngayo ukukhawulezisa ukunciphisa iikhemikhali ze-carbon dioxide kuluntu olungathathi cala kwi-carbon dioxide.
Ukuphinda usebenzise i-carbon dioxide (CO2) ekhutshwa kwiinkqubo zoshishino kuyimfuneko kumzamo ongxamisekileyo woluntu wokufumana uluntu oluzinzileyo nolungenazo iikhabhoni. Ngenxa yesi sizathu, ii-electrocatalysts ezinokuguqula i-CO2 ngokufanelekileyo zibe zezinye iimveliso zeekhemikhali ezingonakalisiyo zifundwa ngokubanzi ngoku. Udidi lwezinto ezaziwa ngokuba zii-dichalcogenides zesinyithi ezinemilinganiselo emibini (2D) zingabantu abafanelekela ukutshintshwa kwe-CO2, kodwa ezi zinto zihlala zikhuthaza iimpendulo ezikhuphisanayo, zinciphisa ukusebenza kwazo. UYasufumi Takahashi kunye noogxa bakhe kwiNanobiology Science Institute (WPI-NanoLSI) kwiYunivesithi yaseKanazawa bachonge i-dichalcogenide yesinyithi enemilinganiselo emibini enokunciphisa i-CO2 ibe yi-formic acid, kungekuphela nje kwimvelaphi yendalo. Ngaphezu koko, olu nxibelelwano luyikhonkco eliphakathi. imveliso yokwenziwa kweekhemikhali.
UTakahashi kunye noogxa bakhe bathelekise umsebenzi wokutsala we-disulfide enemilinganiselo emibini (MoS2) kunye ne-tin disulfide (SnS2). Zombini zii-dichalcogenides zesinyithi ezinemilinganiselo emibini, le yokugqibela inomdla kakhulu kuba i-tin ecocekileyo yaziwa ngokuba yi-catalyst yokuvelisa i-formic acid. Uvavanyo lwe-electrochemical lwale mixube lubonise ukuba i-hydrogen evolution reaction (HER) ikhawuleziswa kusetyenziswa i-MoS2 endaweni yokuguqulwa kwe-CO2. I-HER ibhekisa kwi-reaction evelisa i-hydrogen, eluncedo xa iceba ukuvelisa i-hydrogen fuel, kodwa kwimeko yokunciphisa i-CO2, yinkqubo engathandekiyo yokukhuphisana. Kwelinye icala, i-SnS2 ibonise umsebenzi omhle wokunciphisa i-CO2 kwaye yathintela i-HER. Abaphandi bakwathathe imilinganiselo ye-electrochemical yomgubo we-SnS2 kwaye bafumanisa ukuba ayisebenzi kangako ekunciphiseni i-CO2 nge-catalytic.
Ukuze baqonde apho iindawo ezisebenzayo kwi-SnS2 zikhoyo kwaye kutheni izinto ze-2D zisebenza ngcono kune-bulk compound, izazinzulu zisebenzise indlela ebizwa ngokuba yi-scanning cell electrochemical microscopy (SECCM). I-SECCM isetyenziswa njenge-nanopipette, yenza i-nanoscale meniscus-shaped electrochemical cell yee-probes ezibuthathaka kwiimpendulo zomphezulu kwiisampuli. Ukulinganisa kubonise ukuba umphezulu wonke wephepha le-SnS2 wawusebenza kwi-catalytically, kungekuphela nje "kwiqonga" okanye "kwi-edge" elements kwisakhiwo. Oku kuchaza nokuba kutheni i-2D SnS2 inomsebenzi ophezulu xa kuthelekiswa ne-bulk SnS2.
Ubalo lubonelela ngengcaciso engaphezulu malunga neempendulo zeekhemikhali ezenzekayo. Ngokukodwa, ukwakheka kwe-formic acid kuchongiwe njengendlela yokusabela evumayo ngamandla xa i-2D SnS2 isetyenziswa njenge-catalyst.
Iziphumo zikaTakahashi kunye noogxa bakhe zibonisa inyathelo elibalulekileyo ekusebenziseni ii-electrocatalysts ezinemilinganiselo emibini kwizicelo zokunciphisa i-CO2 nge-electrochemical. Izazinzulu zithi: “Ezi ziphumo ziya kubonelela ngokuqonda okungcono kunye nophuhliso lwesicwangciso se-electrocatalysis yesinyithi esinemilinganiselo emibini se-dichalcogenide yokunciphisa i-carbon dioxide nge-electrochemical ukuvelisa ii-hydrocarbons, ii-alcohols, ii-fatty acids kunye nee-alkenes ngaphandle kwemiphumo emibi.”
Amaphepha e-dichalcogenides esinyithi anemilinganiselo emibini (2D) (okanye ii-monolayers) zizinto zohlobo lwe-MX2 apho i-M iyi-athomu yesinyithi, efana ne-molybdenum (Mo) okanye i-tin (Sn), kwaye i-X yi-athomu ye-chalcogen, efana ne-sulfur (C). Isakhiwo sinokubonakaliswa njengomaleko wee-athomu ze-X phezu komaleko wee-athomu ze-M, ezifumaneka kumaleko wee-athomu ze-X. Ii-dichalcogenides zesinyithi ezinemilinganiselo emibini ziyinxalenye yezinto ezibizwa ngokuba zizinto ezinemilinganiselo emibini (ezikwaquka i-graphene), oko kuthetha ukuba zincinci. Izinto ze-2D zihlala zineempawu zomzimba ezahlukeneyo kunezo zilingana nazo ezinkulu (3D).
Ii-dichalcogenides zesinyithi ezinemilinganiselo emibini ziye zaphandwa ngomsebenzi wazo we-electrocatalytic kwi-hydrogen evolution reaction (HER), inkqubo yeekhemikhali evelisa i-hydrogen. Kodwa ngoku, uYasufumi Takahashi kunye noogxa bakhe kwiYunivesithi yaseKanazawa bafumanise ukuba i-dichalcogenide yesinyithi enemilinganiselo emibini i-SnS2 ayibonisi umsebenzi we-HER catalytic; le yimpawu ebaluleke kakhulu kumxholo weqhinga lomzila.
Yusuke Kawabe, Yoshikazu Ito, Yuta Hori, Suresh Kukunuri, Fumiya Shiokawa, Tomohiko Nishiuchi, Samuel Chon, Kosuke Katagiri, Zeyu Xi, Chikai Lee, Yasuteru Shigeta kunye noYasufumi Takahashi. I-Plate 1T / 1H-SnS2 yokudluliselwa kwe-electrochemical ye-CO2, i-ACS XX, i-XXX-XXX (2023).
Isihloko: Ukuskena iimvavanyo kwi-electrochemical microscopy yeeseli ukuze kufundwe umsebenzi we-catalytic weeshiti ze-SnS2 ukunciphisa ukukhutshwa kwe-CO2.
I-Nanobiological Institute yeYunivesithi yaseKanazawa (iNanoLSI) yasungulwa ngo-2017 njengenxalenye yenkqubo yeziko lophando lamazwe ngamazwe eliphambili kwihlabathi i-MEXT. Injongo yale nkqubo kukudala iziko lophando elikumgangatho wehlabathi. Ngokudibanisa ulwazi olubaluleke kakhulu kwi-microscopy ye-bioscan probe microscopy, i-NanoLSI iseka "iteknoloji ye-nanoendoscopy" yokufota ngokuthe ngqo, uhlalutyo kunye nokuphathwa kwee-biomolecules ukuze kufunyanwe ukuqonda ngeendlela ezilawula iziganeko zobomi ezifana nesifo.
Njengeyunivesithi ephambili yemfundo ngokubanzi elunxwemeni loLwandle lwaseJapan, iYunivesithi yaseKanazawa inegalelo elikhulu kwimfundo ephakamileyo nakuphando lwezemfundo eJapan ukusukela oko yasekwa ngo-1949. Le yunivesithi inamakholeji amathathu kunye nezikolo ezili-17 ezibonelela ngezifundo ezifana nezonyango, ikhompyutha, kunye nezifundo zobuntu.
Le yunivesithi ikwiKanazawa, isixeko esidumileyo ngembali nenkcubeko yaso, kunxweme loLwandle lwaseJapan. Ukususela kwixesha lobukhosi (1598-1867), iKanazawa iye yanandipha udumo olusemthethweni lwengqondo. IYunivesithi yaseKanazawa yahlulwe yangamaziko amabini aphambili, iKakuma neTakaramachi, kwaye inabafundi abamalunga ne-10,200, abangama-600 kubo ngabafundi bamazwe ngamazwe.
Jonga umxholo wokuqala: https://www.prnewswire.com/news-releases/kanazawa-university-research-enhancing-carbon-dioxide-reduction-301846809.html