KANAZAWA, Japan, Okwamukaaga 8, 2023 /PRNewswire/ — Abacondoozi ba yunivasite ya Kanazawa nibagamba oku ekicweka ky’ekyoma ekirikwetwa tin disulfide ekikye munonga kirikubaasa kukoresibwa kutunguura emibazi y’okukyendeeza omuyaga ogurikwetwa carbon dioxide. ahabw’ekibiina ekitarimu kaboni.
Okugaruzaho omuyaga gwa carbon dioxide (CO2) ogurikuruga omu nkora z‘amakorero n‘ekyetengo omu kusherura kw‘ahonaaho kw‘abantu okutunga ekibiina ekigumire, ekitarimu carbon dioxide. Ahabw’enshonga egi, eby’okukoresa eby’amashanyarazi ebirikubaasa kuhindura gye CO2 omu bintu ebindi eby’emibazi ebitari by’akabi munonga hati nibikyeberwa munonga. Ekibiina ky’ebintu ebirikumanywa nka two-dimensional (2D) metal dichalcogenides nibibaasa kuba eby’okukoresa omu kuhindura CO, kwonka ebintu ebi nibikira n’okutunguura okugarukamu okurikurwanira, okukyendeeza aha busingye bwabyo. Yasufumi Takahashi na bagyenzi be omu itendekyero ry’eby’obuhangwa erya Kanazawa University (WPI-NanoLSI) bakashanga ekyoma ky’emiringo ebiri ekirikubaasa kukyendeeza gye CO2 kuhika aha asidi ya formic, beitu kitari ky’obuhangwa bwonka. Ekindi, enkwatanisa egi n’enkwatanisa y’ahagati. ekirugire omu kuteerana kw’eby’emibazi.
Takahashi na bagyenzi be bakagyeragyeranisa emirimo y’okureetaho ebiriisa ebiri omu nkora (MoS2) n’ebiriisa ebiri omu nkora (SnS2). Ebyo byombi n’ebyoma bya dichalcogenides eby’emiringo ebiri, eky’aha muheru nikishemeza munonga ahabw’okuba etini eshemeire neemanyirwa aha kureetaho okukora kwa formic acid. Okukyebera kw’amashanyarazi aha birungo ebi kukareebeka ngu enkora y’okuhinduka kw’amaizi (HER) neetunguuka juba barikukoresa MoS2 omu mwanya gw’okuhindura CO2. HER nikimanyisa okugarukamu okurikureetaho haidrojeni, erikuba ey’omugasho waaba nooteekateeka kureetaho amajuta ga haidrojeni, kwonka omu nshonga y’okukyendeeza CO2, n’omuringo gw’okuhakanisa ogutarikwetengyesa. Aha rubaju orundi, SnS2 ekooreka emirimo mirungi y‘okukyendeeza CO2 kandi ekazibira HER. Abacondoozi kandi bakatwara ebipimo by’amashanyarazi eby’obucupa bwa SnS2 obuhango kandi baashanga ngu bukaba butarikukora munonga omu kukyendeeza CO2.
Okwetegyereza ahu emyanya erikukora aha nkora y’okureetaho ebiriisa biri omu SnS2 n’ahabw’enki ekintu kya 2D nikikora gye kukira ekirungo ky’ebintu bingi, abanyasayansi bakakoresa omuringo ogurikwetwa scanning cell electrochemical microscopy (SECCM). SECCM neekoresibwa nka nanopipette, erikukora obutafaari bw’amashanyarazi oburi omu muringo gwa nanoscale meniscus ahabw’okucondooza okurikuhurira gye ebirikubaho aha itaka aha bishushani. Ebipimo bikooreka ngu aha mutwe gwona ogw’orupapura rwa SnS2 rukaba ruri orurikukora nk’ekirikureetaho okuhinduka, ti “platform” nari “edge” zonka eziri omu nkora. Eki nakyo nikishoboorora ahabwenki 2D SnS2 eine emirimo mingi waagyeragyeranisa na bulk SnS2.
Okubara nikutuha okumanya okurikukiraho aha nkora y’eby’obuhangwa erikubaho. Okukira munonga, okukora kwa formic acid kumanyirwe nk’omuhanda gw’okugarukamu ogurikushemeza omu by’amaani obu 2D SnS2 erikukoresibwa nk’ekirikureetaho okuhinduka.
Ebirugire omu kucondooza kwa Takahashi na bagyenzi be nibimanyisa eitembezo rikuru omu kukoresa eby‘okukoresa eby‘amashanyarazi eby‘emiringo ebiri omu kukozesa eby‘amashanyarazi eby‘okukyendeeza CO2. Abanyasayansi nibajuriza bati: “Ebirugire omu kucondooza oku nibiija kutuha okwetegyereza kurungi n’okukora enkora y’okukoresa amashanyarazi g’ebyoma ebirikwetwa dichalcogenide electrocatalysis ey’emiringo ebiri ey’okukyendeeza aha nshaho y’amashanyarazi kubaasa kureetaho ebiriisa by’amaizi, amaarwa, ebishaju n’ebiriisa ebirikwetwa alkenes hatariho kabi koona.
Ebipapura bibiri (2D) (nari shi ebicweka bimwe) eby’ekyoma ekirikwetwa dichalcogenides n’ebintu by’omuringo gwa MX2 ahu M eri atomu y’ekyoma, nka molybdenum (Mo) nari tin (Sn), kandi X eri atomu ya chalcogen, nka sulfur (C). Omubumbi naabaasa kworekwa nk’omutindo gwa atomu za X aha mutwe gw’omutindo gwa atomu za M, kandi ogundi gukaba guri aha mutindo gwa atomu za X. Ekyoma ky’emiringo ebiri ekya dichalcogenides nikiruga omu kika ky’ebintu ebirikwetwa eby’emiringo ebiri (ekirimu na graphene), ekirikumanyisa ngu nibikyeera. Ebintu bya 2D nibikira kuba biine emitwarize y’omubiri etarikushushana n’ey’ebintu bingi (3D).
Ekyoma ky’emiringo ebiri ekya dichalcogenides kicondooziibwe ahabw’emirimo yaabyo ey’okuhindura amashanyarazi omu nkora y’okuhinduka kw’amaizi (HER), omuringo gw’eby’obuhangwa ogurikureetaho amaizi. Kwonka hati, Yasufumi Takahashi na bagyenzi be aha yunivasite ya Kanazawa bakashanga ngu ekyoma ky’emiringo ebiri ekya dichalcogenide SnS2 tikirikworeka omurimo gwa HER ogw’okureetaho okuhinduka; eki n‘ekintu kikuru munonga omu nkora y‘enkora y‘okukuratira.
Yusuke Kawabe, Yoshikazu Ito, Yuta Hori, Suresh Kukunuri, Fumiya Shiokawa, Tomohiko Nishiuchi, Samuel Chon, Kosuke Katagiri, Zeyu Xi, Chikai Lee, Yasuteru Shigeta na Yasufumi Takahashi. 1T/1H-SnS2 ahabw‘okuhingisa CO2 omu by‘amashanyarazi, ACS XX, XXX–XXX (2023).
Omutwe: Okugyezesa kw‘okukyebera aha electrochemical microscopy y‘obutafaari kwega aha mirimo y‘okureetaho ebiriisa bya SnS2 kukyendeeza aha CO2 erikuruga omu itaka.
Ekitongore kya Nanobiological ekya Kanazawa University (NanoLSI) kikatandikirwaho omu mwaka gwa 2017 nk’ekicweka kya puroguraamu y’ekitongore ky’okucondooza eky’ensi yoona ekya MEXT. Ekigyendererwa kya puroguraamu egi n’okuhangaho omwanya gw’okucondooza ogw’omutindo gw’ensi yoona. Okugaita okumanya okurikukirayo obukuru omu kucondooza aha bihangirwe ebiine amagara, NanoLSI neetaho “tekinologiya ya nanoendoscopy” ey’okuteera ebishushani butoosha, okushwijuma n’okukoresa ebihangirwe ebiine amagara kutunga okumanya aha miringo erikutegyeka ebintu ebirikubaho omu magara nk’endwara.
Nk’eishomero erikwebembera omu by’obwegyese bwa boona aha rubaju rw’enyanja ya Japan, Kanazawa University ekozire kihango omu by’obwegyese bwahaiguru n’okucondooza aha by’obwegyese omuri Japan kuruga obu yaatandika omu 1949. Yunivasite egi eine amatendekyero ashatu n’amashomero 17 agarikuha eby’obwegyese nk’eby’obushaho, eby’okukozesa kompyuta, n’eby’obuntu.
Yunivasite egi eri omuri Kanazawa, orurembo orumanyirwe ahabw’ebyafaayo n’obuhangwa bwarwo, aha rubaju rw’enyanja ya Japan. Kuruga omu bwire bw’obutegyeki bw’abakama (1598-1867), Kanazawa akatunga ekitiinisa ky’obwengye eky’obushoboorozi. Yunivasite ya Kanazawa ebaganisiibwemu ebicweka bibiri ebikuru, Kakuma na Takaramachi, kandi eine abeegi nka 10,200, 600 aharibo n’abeegi kuruga omu mahanga agandi.
Reeba ebiri omu nshonga y'okubanza: https://www.prnewswire.com/amakuru-agashohoziibwe/okucondooza-okw'omu yunivasite ya kanazawa-okutunguura-okukyendeeza-omuyaga-omuyaga-301846809.html