KANAZAWA, Japan, June 8, 2023 /PRNewswire/ — Ofufuza a Kanazawa University akufotokoza momwe wosanjikiza woonda kwambiri wa tin disulfide ungagwiritsidwire ntchito kufulumizitsa kuchepetsa kwa mankhwala a carbon dioxide. kwa anthu osakonda carbon dioxide.
Kubwezeretsanso carbon dioxide (CO2) yotulutsidwa kuchokera ku mafakitale ndikofunikira kwambiri pakufunafuna mwachangu kwa anthu kuti akhale ndi chikhalidwe chokhazikika komanso chopanda kaboni. Pachifukwa ichi, ma electrocatalysts omwe amatha kusintha CO2 bwino kukhala mankhwala ena osavulaza kwambiri akuphunziridwa kwambiri pakadali pano. Gulu la zipangizo zodziwika kuti two-dimensional (2D) metal dichalcogenides ndi omwe amafunidwa kukhala ma electrocatalysts kuti CO isinthidwe, koma zinthuzi nthawi zambiri zimalimbikitsanso zochitika zopikisana, zomwe zimachepetsa kugwira ntchito kwawo. Yasufumi Takahashi ndi anzake ku Kanazawa University's Nanobiology Science Institute (WPI-NanoLSI) apeza two-dimensional metal dichalcogenide yomwe ingathandize kuchepetsa CO2 kukhala formic acid, osati yachilengedwe chokha. Kuphatikiza apo, kulumikizana kumeneku ndi cholumikizira chapakati cha kapangidwe ka mankhwala.
Takahashi ndi anzake anayerekezera ntchito yothandiza ya disulfide ya magawo awiri (MoS2) ndi tin disulfide (SnS2). Zonsezi ndi zitsulo zamitundu iwiri, zomwe ndi zofunika kwambiri chifukwa tin yoyera imadziwika kuti ndi yothandiza popanga formic acid. Kuyesa kwa electrochemical kwa mankhwala awa kunawonetsa kuti hydrogen evolution reaction (HER) imafulumizitsidwa pogwiritsa ntchito MoS2 m'malo mwa CO2 conversion. HER imatanthauza reaction yomwe imapanga hydrogen, yomwe ndi yothandiza popanga hydrogen mafuta, koma pankhani ya kuchepetsa CO2, ndi njira yosasangalatsa yopikisana. Kumbali ina, SnS2 inasonyeza ntchito yabwino yochepetsera CO2 ndipo inaletsa HER. Ofufuzawo adatenganso muyeso wa electrochemical wa ufa wa SnS2 wambiri ndipo adapeza kuti sunali wogwira ntchito kwambiri pakuchepetsa CO2.
Kuti amvetse komwe malo ogwiritsira ntchito mphamvu zamagetsi ali mu SnS2 komanso chifukwa chake zinthu za 2D zimagwira ntchito bwino kuposa chinthu chochuluka, asayansi adagwiritsa ntchito njira yotchedwa scanning cell electrochemical microscopy (SECCM). SECCM imagwiritsidwa ntchito ngati nanopipette, kupanga selo la electrochemical looneka ngati meniscus la ma probes omwe amakhudzidwa ndi zomwe zimachitika pamwamba pa zitsanzo. Miyesoyo idawonetsa kuti pamwamba pa pepala la SnS2 panali chothandizira mphamvu zamagetsi, osati zinthu za "pulatifomu" kapena "m'mphepete" zokha zomwe zili mu kapangidwe kake. Izi zikufotokozanso chifukwa chake 2D SnS2 ili ndi ntchito yayikulu poyerekeza ndi SnS2 yochuluka.
Kuwerengera kumapereka chidziwitso chowonjezereka pa momwe mankhwala amachitira. Makamaka, kupangidwa kwa formic acid kwadziwika kuti ndi njira yabwino kwambiri yochitira zinthu pamene 2D SnS2 imagwiritsidwa ntchito ngati chothandizira.
Zomwe Takahashi ndi anzake adapeza zikusonyeza gawo lofunika kwambiri pakugwiritsa ntchito ma electrocatalyst amitundu iwiri pochepetsa CO2 pogwiritsa ntchito ma electrochemical. Asayansiwa akuti: "Zotsatirazi zipereka kumvetsetsa bwino ndi chitukuko cha njira ya electrocatalysis ya zitsulo ziwiri ya dichalcogenide yochepetsera carbon dioxide kuti ipange ma hydrocarbons, ma alcohols, mafuta acids ndi ma alkenes popanda zotsatirapo zoyipa."
Mapepala a dichalcogenides a chitsulo okhala ndi magawo awiri (2D) (kapena zigawo ziwiri) ndi zinthu zamtundu wa MX2 pomwe M ndi atomu yachitsulo, monga molybdenum (Mo) kapena tin (Sn), ndipo X ndi atomu ya chalcogen, monga sulfure (C). Kapangidwe kake kakhoza kufotokozedwa ngati gawo la maatomu a X pamwamba pa gawo la maatomu a M, omwe nawonso amakhala pa gawo la maatomu a X. Dichalcogenides achitsulo okhala ndi magawo awiri ali m'gulu la zinthu zotchedwa magawo awiri (zomwe zimaphatikizaponso graphene), zomwe zikutanthauza kuti ndi zopyapyala. Zinthu za 2D nthawi zambiri zimakhala ndi mawonekedwe osiyana ndi ofanana nawo a bulk (3D).
Ma dichalcogenides achitsulo okhala ndi magawo awiri afufuzidwa chifukwa cha ntchito yawo ya electrocatalytic mu hydrogen evolution reaction (HER), njira ya mankhwala yomwe imapanga hydrogen. Koma tsopano, Yasufumi Takahashi ndi anzake ku University of Kanazawa apeza kuti dichalcogenide SnS2 yachitsulo chokhala ndi magawo awiri sichiwonetsa ntchito ya HER catalytic; ichi ndi chinthu chofunikira kwambiri pankhani ya njira.
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 ya electrochemical transfer ya CO2, ACS XX, XXX–XXX (2023).
Mutu: Kusanthula zoyeserera pa electrochemical microscopy ya maselo kuti aphunzire ntchito yothandiza ya mapepala a SnS2 kuti achepetse mpweya wa CO2.
Nanobiological Institute of Kanazawa University (NanoLSI) idakhazikitsidwa mu 2017 ngati gawo la pulogalamu ya malo otsogola padziko lonse lapansi ofufuza padziko lonse lapansi a MEXT. Cholinga cha pulogalamuyi ndikupanga malo ofufuzira apamwamba kwambiri padziko lonse lapansi. Pogwiritsa ntchito chidziwitso chofunikira kwambiri mu microscopy ya bioscanning probe, NanoLSI imakhazikitsa "ukadaulo wa nanoendoscopy" wojambulira mwachindunji, kusanthula ndi kusintha ma biomolecule kuti amvetsetse njira zomwe zimawongolera zochitika zamoyo monga matenda.
Monga yunivesite yotsogola yophunzitsa anthu onse m'mphepete mwa Nyanja ya Japan, Yunivesite ya Kanazawa yapereka chithandizo chachikulu ku maphunziro apamwamba ndi kafukufuku wamaphunziro ku Japan kuyambira pomwe idakhazikitsidwa mu 1949. Yunivesiteyi ili ndi makoleji atatu ndi masukulu 17 omwe amapereka maphunziro monga zamankhwala, makompyuta, ndi zaumunthu.
Yunivesiteyi ili ku Kanazawa, mzinda wotchuka chifukwa cha mbiri yake ndi chikhalidwe chake, m'mphepete mwa Nyanja ya Japan. Kuyambira nthawi ya ulamuliro wa feudal (1598-1867), Kanazawa yakhala ndi ulemu waukulu waukadaulo. Yunivesite ya Kanazawa yagawidwa m'masukulu awiri akuluakulu, Kakuma ndi Takaramachi, ndipo ili ndi ophunzira pafupifupi 10,200, 600 mwa iwo ndi ophunzira ochokera kumayiko ena.
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