I-KANAZAWA, eJapane, ngoJuni 8, 2023 /PRNewswire/ — Abacwaningi beNyuvesi yaseKanazawa babika ukuthi ungqimba oluncane kakhulu lwe-tin disulfide lungasetshenziswa kanjani ukusheshisa ukwehla kwamakhemikhali e-carbon dioxide. emphakathini ongathathi hlangothi kwe-carbon.
Ukuphinda usebenzise i-carbon dioxide (CO2) ekhishwa yizinqubo zezimboni kuyimfuneko ekufuneni okuphuthumayo kwesintu umphakathi ozinzile, ongathathi hlangothi kwe-carbon. Ngenxa yalesi sizathu, ama-electrocatalyst angakwazi ukuguqula i-CO2 ngempumelelo ibe eminye imikhiqizo yamakhemikhali engeyona ingozi okwamanje afundwa kabanzi. Uhlobo lwezinto ezaziwa ngokuthi ama-dichalcogenides ensimbi anezinhlangothi ezimbili (2D) angama-electrocatalyst okuguqulwa kwe-CO2, kodwa lezi zinto zivame ukukhuthaza ukusabela okuncintisanayo, kunciphisa ukusebenza kwazo kahle. UYasufumi Takahashi kanye nozakwabo e-Nanobiology Science Institute (WPI-NanoLSI) eNyuvesi yaseKanazawa bathole i-dichalcogenide yensimbi enezinhlangothi ezimbili enganciphisa i-CO2 ngempumelelo ibe yi-formic acid, hhayi nje imvelaphi yemvelo. Ngaphezu kwalokho, lokhu kuxhumana kuwumkhiqizo ophakathi wokwenziwa kwamakhemikhali.
UTakahashi nozakwabo baqhathanise umsebenzi wokuvuselela we-disulfide enezinhlangothi ezimbili (MoS2) kanye ne-tin disulfide (SnS2). Zombili ziyi-dichalcogenides yensimbi enezinhlangothi ezimbili, lokhu kokugcina kuthakazelisa kakhulu ngoba i-tin emsulwa yaziwa njenge-catalyst yokukhiqizwa kwe-formic acid. Ukuhlolwa kwe-electrochemical kwalezi zinhlanganisela kubonise ukuthi ukusabela kokuziphendukela kwemvelo kwe-hydrogen (HER) kuyasheshiswa kusetshenziswa i-MoS2 esikhundleni sokuguqulwa kwe-CO2. I-HER ibhekisela ekusabeleni okukhiqiza i-hydrogen, okuwusizo lapho kuhloswe ukukhiqiza uphethiloli we-hydrogen, kodwa esimweni sokunciphisa i-CO2, kuyinqubo engathandeki yokuncintisana. Ngakolunye uhlangothi, i-SnS2 ibonise umsebenzi omuhle wokunciphisa i-CO2 futhi yavimbela i-HER. Abacwaningi baphinde bathatha izilinganiso ze-electrochemical ze-bulk SnS2 powder futhi bathola ukuthi yayingasebenzi kangako ekunciphiseni i-CO2 nge-catalytic.
Ukuze baqonde ukuthi izindawo ezisebenzayo ze-catalytically zitholakala kuphi ku-SnS2 nokuthi kungani izinto ze-2D zisebenza kangcono kune-bulk compound, ososayensi basebenzise inqubo ebizwa ngokuthi i-scanning cell electrochemical microscopy (SECCM). I-SECCM isetshenziswa njenge-nanopipette, yakha iseli le-electrochemical eliyi-meniscus eliyi-nanoscale lama-probe azwela ukusabela kobuso kumasampula. Ukulinganisa kubonise ukuthi ubuso bonke beshidi le-SnS2 babusebenza nge-catalytically, hhayi nje izakhi "zepulatifomu" noma "zomphetho" esakhiweni. Lokhu kuchaza nokuthi kungani i-2D SnS2 inomsebenzi ophezulu uma kuqhathaniswa ne-bulk SnS2.
Izibalo zinikeza ukuqonda okwengeziwe mayelana nokusabela kwamakhemikhali okwenzekayo. Ikakhulukazi, ukwakheka kwe-formic acid kuye kwabonakala njengendlela yokusabela evumayo ngamandla lapho i-2D SnS2 isetshenziswa njenge-catalyst.
Okutholakele kukaTakahashi nozakwabo kubonisa isinyathelo esibalulekile ekusetshenzisweni kwama-electrocatalyst anezinhlangothi ezimbili ekusetshenzisweni kokunciphisa i-CO2 nge-electrochemical. Ososayensi bathi: “Le miphumela izohlinzeka ngokuqonda okungcono kanye nentuthuko yesu le-electrocatalysis yensimbi enezinhlangothi ezimbili le-dichalcogenide yokunciphisa i-carbon dioxide nge-electrochemical ukuze kukhiqizwe ama-hydrocarbon, ama-alcohols, ama-fatty acid kanye nama-alkenes ngaphandle kwemiphumela emibi.”
Amashidi (noma ama-monolayers) ensimbi e-dichalcogenides ayizinto zohlobo lwe-MX2 lapho i-M iyi-athomu yensimbi, njenge-molybdenum (Mo) noma i-tin (Sn), kanti i-X iyi-athomu ye-chalcogen, njenge-sulfur (C). Isakhiwo singavezwa njengengqimba yama-athomu e-X phezu kwengqimba yama-athomu e-M, nayo etholakala kungqimba yama-athomu e-X. Ama-dichalcogenides ensimbi anezinhlangothi ezimbili ayingxenye yezinto ezibizwa ngokuthi izinto ezinezinhlangothi ezimbili (ezihlanganisa ne-graphene), okusho ukuthi zincane. Izinto ze-2D zivame ukuba nezakhiwo zomzimba ezihlukile kunezakhi zazo ezinkulu (3D).
Ama-dichalcogenide ensimbi anezinhlangothi ezimbili ahlolisisiwe ngomsebenzi wawo we-electrocatalytic ku-hydrogen evolution reaction (HER), inqubo yamakhemikhali ekhiqiza i-hydrogen. Kodwa manje, uYasufumi Takahashi kanye nozakwabo eNyuvesi yaseKanazawa bathole ukuthi i-dichalcogenide yensimbi enezinhlangothi ezimbili i-SnS2 ayibonisi umsebenzi we-HER catalytic; lokhu kuyisici esibaluleke kakhulu kumongo wecebo lomzila.
Yusuke Kawabe, Yoshikazu Ito, Yuta Hori, Suresh Kukunuri, Fumiya Shiokawa, Tomohiko Nishiuchi, Samuel Chon, Kosuke Katagiri, Zeyu Xi, Chikai Lee, Yasuteru Shigeta and Yasufumi Takahashi. I-Plate 1T/1H-SnS2 yokudluliswa kwe-electrochemical ye-CO2, ACS XX, XXX–XXX (2023).
Isihloko: Ukuskena izivivinyo ku-electrochemical microscopy yamaseli ukuze kufundwe umsebenzi we-catalytic wamashidi e-SnS2 ukuze kuncishiswe ukukhishwa kwe-CO2.
I-Nanobiological Institute yaseKanazawa University (NanoLSI) yasungulwa ngo-2017 njengengxenye yohlelo lwesikhungo sokucwaninga samazwe ngamazwe esihamba phambili emhlabeni i-MEXT. Umgomo wohlelo ukudala isikhungo sokucwaninga esisezingeni lomhlaba. Ngokuhlanganisa ulwazi olubaluleke kakhulu ku-microscopy ye-bioscan probe microscopy, i-NanoLSI isungula "ubuchwepheshe be-nanoendoscopy" bokuthwebula izithombe eziqondile, ukuhlaziya kanye nokuphathwa kwama-biomolecule ukuze kutholakale ukuqonda ngezindlela ezilawula izimo zokuphila ezifana nezifo.
Njengeyunivesithi ehamba phambili yemfundo ejwayelekile ogwini loLwandle lwaseJapan, iKanazawa University ibe negalelo elikhulu emfundweni ephakeme kanye nocwaningo lwezemfundo eJapan selokhu yasungulwa ngo-1949. Le nyuvesi inamakolishi amathathu kanye nezikole ezingu-17 ezinikeza izifundo ezifana nezokwelapha, ikhompyutha kanye nezifundo zobuntu.
Le nyuvesi itholakala eKanazawa, idolobha elidumile ngomlando walo namasiko alo, ogwini loLwandle lwaseJapan. Kusukela enkathini yobushiqela (1598-1867), iKanazawa ibilokhu ijabulela udumo lobuhlakani olugunyaziwe. IYunivesithi yaseKanazawa ihlukaniswe ngamakhampasi amabili amakhulu, iKakuma neTakaramachi, futhi inabafundi ababalelwa ku-10,200, abangu-600 kubo abangabafundi bamazwe ngamazwe.
Buka okuqukethwe kokuqala: https://www.prnewswire.com/news-releases/kanazawa-university-research-enhancing-carbon-dioxide-reduction-301846809.html