KANAZAWA, Japan, Chikumi 8, 2023 /PRNewswire/ — Vaongorori veKanazawa University vanotaura kuti tin disulfide inogona kushandiswa sei nekukurumidza kuderedza makemikari ecarbon dioxide kune nzanga isina carbon neutral.
Kudzokorodza kabhoni dhayokisaidhi (CO2) inoburitswa kubva mumaindasitiri chinhu chakakosha mukutsvaga kwevanhu nekukurumidza kwenharaunda inogara kwenguva refu, isina kabhoni. Nekuda kwechikonzero ichi, ma electrocatalysts anogona kushandura CO2 zvinobudirira kuita zvimwe zvigadzirwa zvemakemikari zvisingakuvadzi zviri kudzidzwa zvakanyanya parizvino. Rudzi rwezvinhu zvinozivikanwa se two-dimensional (2D) metal dichalcogenides ndizvo zvinofanirwa kushandiswa se electrocatalysts pakushandurwa kweCO2, asi zvinhu izvi zvinowanzo kurudzirawo makwikwi ekuita, zvichideredza kushanda kwazvo. Yasufumi Takahashi nevamwe vake paKanazawa University's Nanobiology Science Institute (WPI-NanoLSI) vakaona two-dimensional metal dichalcogenide inogona kuderedza CO2 kuita formic acid, kwete yezvisikwa chete. Uyezve, kubatana uku ipakati pechigadzirwa chemakemikari.
Takahashi nevamwe vake vakaenzanisa basa re catalytic re two-dimensional disulfide (MoS2) ne tin disulfide (SnS2). Dzese dziri mbiri-dimensional metal dichalcogenides, yekupedzisira ichinyanya kufadza nekuti pure tin inozivikanwa se catalyst yekugadzira formic acid. Kuedzwa kwe electrochemical kwemakemikari aya kwakaratidza kuti hydrogen evolution reaction (HER) inokurumidza kushandiswa MoS2 pachinzvimbo cheCO2 conversion. HER inoreva reaction inogadzira hydrogen, iyo inobatsira kana ichitsvaga kugadzira hydrogen fuel, asi kana CO2 yadzikiswa, inzira isingadiwi yekukwikwidzana. Kune rumwe rutivi, SnS2 yakaratidza basa rakanaka rekuderedza CO2 uye yakadzivisa HER. Vaongorori vakatorawo electrochemical measurements ye bulk SnS2 powder uye vakaona kuti yakanga isinganyanyi kushanda mu catalytic reduction ye CO2.
Kuti vanzwisise kuti nzvimbo dzinoshanda secatalytically dziri kupi muSnS2 uye kuti nei chinhu che2D chichiita zviri nani pane chinhu chakawanda, masayendisiti akashandisa nzira inonzi scanning cell electrochemical microscopy (SECCM). SECCM inoshandiswa se nanopipette, ichigadzira nanoscale meniscus-shaped electrochemical cell yemaprobes anonzwa maitiro epamusoro pamasampuli. Kuyerwa kwakaratidza kuti pamusoro pese peSnS2 sheet paive necatalytically active, kwete chete "platform" kana "edge" elements muchimiro. Izvi zvinotsanangurawo kuti nei 2D SnS2 iine basa rakawanda zvichienzaniswa nebulk SnS2.
Kuverenga kunopa rumwe ruzivo nezvemaitiro emakemikari anoitika. Kunyanya, kuumbwa kwe formic acid kwakaonekwa senzira yemhinduro yakanaka ine simba kana 2D SnS2 ikashandiswa se catalyst.
Zvakawanikwa naTakahashi nevamwe vake zvinoratidza danho rakakosha pakushandiswa kwema electrocatalysts ane mativi maviri mukushandiswa kwe electrochemical reduction CO2. Masayendisiti anoti: "Mhedzisiro iyi ichapa kunzwisisa kuri nani nekuvandudzwa kwehurongwa hwe electrocatalysis yesimbi ine mativi maviri yekuderedza carbon dioxide ne electrochemical kugadzira mahydrocarbon, alcohols, fatty acids uye alkenes pasina migumisiro yakaipa."
Mapepa esimbi ane mativi maviri (2D) (kana monolayers) e dichalcogenides imhando yeMX2 zvinhu apo M iatomu yesimbi, senge molybdenum (Mo) kana tin (Sn), uye X iatomu yechalcogen, senge sarufa (C). Chimiro chacho chinogona kuratidzwa sechikamu chemaatomu eX pamusoro pechikamu chemaatomu eM, icho chinowanikwawo pane chikamu chemaatomu eX. Ma dichalcogenides esimbi ane mativi maviri ndeeboka rezvinhu zvinonzi mativi maviri (izvo zvinosanganisirawo graphene), zvinoreva kuti zvakatetepa. Zvinhu zve2D zvinowanzova nehunhu hwakasiyana hwemuviri pane zvimwe zvinhu zvakawanda (3D).
Madhichalcogenides esimbi ane mativi maviri akaongororwa kuti anogadzira hydrogen sei mu hydrogen evolution reaction (HER), maitiro emakemikari anogadzira hydrogen. Asi ikozvino, Yasufumi Takahashi nevamwe vake paYunivhesiti yeKanazawa vakaona kuti simbi ine mativi maviri dichalcogenide SnS2 hairatidzi HER catalytic activity; ichi chinhu chakakosha zvikuru mumamiriro ezvinhu ekutsvaga nzira.
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. Plate 1T/1H-SnS2 ye electrochemical transfer ye CO2, ACS XX, XXX–XXX (2023).
Musoro: Kuskena kuyedza pa electrochemical microscopy yemasero kuti tidzidze catalytic activity yeSnS2 sheets kuderedza CO2 emissions.
Nanobiological Institute yeKanazawa University (NanoLSI) yakavambwa muna 2017 sechikamu chechirongwa cheMEXT, nzvimbo yekutsvagisa yepasi rose inotungamira pasi rose. Chinangwa chechirongwa ichi ndechekugadzira nzvimbo yekutsvagisa yepamusoro-soro. Ichibatanidza ruzivo rwakakosha mukuongorora microscopy yekuongorora zvipenyu, NanoLSI inovaka "tekinoroji ye nanoendoscopy" yekufungidzira zvakananga, kuongorora uye kushandisa biomolecules kuti inzwisise mashandiro anodzora zviitiko zvehupenyu zvakaita sezvirwere.
Seyunivhesiti inotungamira mune zvedzidzo yepamusoro pamhenderekedzo yeGungwa reJapan, Kanazawa University yakapa mipiro mikuru mudzidzo yepamusoro netsvagiridzo yedzidzo muJapan kubvira payakavambwa muna 1949. Yunivhesiti iyi ine makoreji matatu nezvikoro gumi nenomwe zvinopa zvidzidzo zvakaita sezvekurapa, zvemakombiyuta, uye zvehunhu.
Yunivhesiti iyi iri muKanazawa, guta rine mukurumbira nekuda kwenhoroondo yaro netsika, pamhenderekedzo yeGungwa reJapan. Kubva panguva yehudzvanyiriri (1598-1867), Kanazawa yave nemukurumbira wepfungwa. Yunivhesiti yeKanazawa yakakamurwa kuita makampasi maviri makuru, Kakuma neTakaramachi, uye ine vadzidzi vanosvika 10,200, 600 vavo vari vadzidzi vekune dzimwe nyika.
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