KANAZAWA, Nyiv Pooj, Lub Rau Hli 8, 2023 /PRNewswire/ — Cov kws tshawb fawb ntawm Kanazawa University tshaj tawm tias yuav siv tau ib txheej nyias nyias ntawm tin disulfide los ua kom cov pa roj carbon dioxide qeeb dua li cas. Rau lub zej zog uas tsis muaj pa roj carbon.
Kev siv cov pa roj carbon dioxide (CO2) uas tawm los ntawm cov txheej txheem kev lag luam yog qhov tseem ceeb hauv tib neeg txoj kev nrhiav kom muaj lub zej zog uas ruaj khov thiab tsis muaj carbon. Vim li no, cov electrocatalysts uas tuaj yeem hloov CO2 mus rau lwm cov khoom siv tshuaj lom neeg uas tsis muaj teeb meem tam sim no tau raug kawm dav dav. Ib chav kawm ntawm cov ntaub ntawv hu ua ob-seem (2D) hlau dichalcogenides yog cov neeg sib tw ua electrocatalysts rau CO hloov pauv, tab sis cov ntaub ntawv no feem ntau kuj txhawb kev sib tw, txo lawv cov kev ua haujlwm. Yasufumi Takahashi thiab cov npoj yaig ntawm Kanazawa University's Nanobiology Science Institute (WPI-NanoLSI) tau txheeb xyuas ob-seem hlau dichalcogenide uas tuaj yeem txo CO2 rau formic acid, tsis yog los ntawm keeb kwm ntuj. Ntxiv mus, qhov kev sib txuas no yog qhov txuas nruab nrab. khoom ntawm kev tsim tshuaj lom neeg.
Takahashi thiab cov npoj yaig tau piv rau qhov kev ua haujlwm catalytic ntawm ob-seem disulfide (MoS2) thiab tin disulfide (SnS2). Ob leeg yog ob-seem hlau dichalcogenides, qhov tom kawg yog qhov tshwj xeeb vim tias tin ntshiab paub tias yog tus catalyst rau kev tsim cov formic acid. Kev sim electrochemical ntawm cov tshuaj no qhia tau hais tias qhov kev hloov pauv hydrogen (HER) raug nrawm dua siv MoS2 es tsis yog CO2 hloov pauv. HER hais txog qhov kev ua haujlwm uas tsim hydrogen, uas yog qhov muaj txiaj ntsig thaum npaj yuav tsim roj hydrogen, tab sis nyob rau hauv cov ntaub ntawv ntawm CO2 txo qis, nws yog ib qho txheej txheem sib tw tsis xav tau. Ntawm qhov tod tes, SnS2 tau qhia txog kev ua haujlwm zoo CO2 txo qis thiab inhibited HER. Cov kws tshawb fawb kuj tau ntsuas electrochemical ntawm cov hmoov SnS2 thiab pom tias nws tsis tshua muaj zog hauv catalytic txo qis ntawm CO2.
Yuav kom nkag siab txog qhov chaw uas cov chaw ua haujlwm catalytic nyob hauv SnS2 thiab vim li cas cov khoom siv 2D ua haujlwm zoo dua li cov khoom sib xyaw ua ke, cov kws tshawb fawb tau siv cov txheej txheem hu ua scanning cell electrochemical microscopy (SECCM). SECCM siv ua nanopipette, tsim cov nanoscale meniscus-puab electrochemical cell rau cov probes uas rhiab rau cov tshuaj tiv thaiv ntawm cov qauv. Cov kev ntsuas qhia tau hais tias tag nrho qhov chaw ntawm daim ntawv SnS2 yog catalytic active, tsis yog tsuas yog "platform" lossis "edge" elements hauv cov qauv. Qhov no kuj piav qhia vim li cas 2D SnS2 muaj kev ua haujlwm siab dua piv rau bulk SnS2.
Cov kev xam suav muab kev nkag siab ntxiv txog cov tshuaj lom neeg uas tshwm sim. Tshwj xeeb, kev tsim cov kua qaub formic tau raug txheeb xyuas tias yog txoj hauv kev ua kom muaj zog thaum 2D SnS2 siv ua cov tshuaj catalyst.
Cov kev tshawb pom ntawm Takahashi thiab cov npoj yaig yog ib kauj ruam tseem ceeb rau kev siv cov electrocatalysts ob-seem hauv kev siv electrochemical CO2 txo qis. Cov kws tshawb fawb hais tias: "Cov txiaj ntsig no yuav muab kev nkag siab zoo dua thiab kev txhim kho ntawm ob-seem hlau dichalcogenide electrocatalysis txoj kev rau kev txo qis electrochemical ntawm carbon dioxide los tsim cov hydrocarbons, cawv, fatty acids thiab alkenes yam tsis muaj kev phiv. cov khoom."
Cov ntawv ob-seem (2D) (lossis monolayers) ntawm cov hlau dichalcogenides yog MX2 hom khoom siv qhov twg M yog ib qho hlau atom, xws li molybdenum (Mo) lossis tin (Sn), thiab X yog ib qho chalcogen atom, xws li sulfur (C). Cov qauv tuaj yeem qhia ua ib txheej ntawm X atoms saum toj ntawm ib txheej ntawm M atoms, uas nyob rau ntawm ib txheej ntawm X atoms. Ob-seem hlau dichalcogenides koom nrog ib chav kawm ntawm cov khoom hu ua ob-seem (uas kuj suav nrog graphene), uas txhais tau tias lawv nyias. Cov khoom siv 2D feem ntau muaj cov khoom sib txawv ntawm lawv cov bulk (3D) counterparts.
Cov hlau dichalcogenides ob-seem tau raug tshawb nrhiav rau lawv cov haujlwm electrocatalytic hauv cov tshuaj hydrogen evolution reaction (HER), ib qho txheej txheem tshuaj uas tsim hydrogen. Tab sis tam sim no, Yasufumi Takahashi thiab cov npoj yaig ntawm University of Kanazawa tau pom tias cov hlau dichalcogenide ob-seem SnS2 tsis qhia txog HER catalytic activity; qhov no yog ib qho khoom tseem ceeb heev hauv cov ntsiab lus tseem ceeb ntawm txoj kev taug.
Yusuke Kawabe, Yoshikazu Ito, Yuta Hori, Suresh Kukunuri, Fumiya Shiokawa, Tomohiko Nishuchi, Samuel Chon, Kosuke Katagiri, Zeyu Xi, Chikai Lee, Yasuteru Shigeta thiab Yasufumi Takahashi. Phaj 1T/1H-SnS2 rau electrochemical hloov ntawm CO2, ACS XX, XXX–XXX (2023).
Lub Npe: Kev sim luam theej duab ntawm electrochemical microscopy ntawm cov hlwb los kawm txog kev ua haujlwm catalytic ntawm SnS2 daim ntawv kom txo cov pa roj carbon dioxide.
Lub Koom Haum Nanobiological ntawm Kanazawa University (NanoLSI) tau tsim muaj nyob rau xyoo 2017 ua ib feem ntawm qhov kev pab cuam ntawm lub chaw tshawb fawb thoob ntiaj teb MEXT. Lub hom phiaj ntawm qhov kev pab cuam yog los tsim kom muaj lub chaw tshawb fawb zoo tshaj plaws hauv ntiaj teb. Ua ke nrog kev paub tseem ceeb tshaj plaws hauv kev tshuaj ntsuam xyuas kab mob, NanoLSI tsim "nanoendoscopy technology" rau kev thaij duab ncaj qha, kev tshuaj xyuas thiab kev tswj hwm cov biomolecules kom nkag siab txog cov txheej txheem uas tswj cov xwm txheej ntawm lub neej xws li kab mob.
Ua ib lub tsev kawm ntawv qib siab ua thawj coj ntawm ntug dej hiav txwv ntawm Hiav Txwv Nyiv Pooj, Kanazawa University tau ua ntau yam kev pab rau kev kawm qib siab thiab kev tshawb fawb hauv Nyiv Pooj txij li thaum nws tau tsim tsa xyoo 1949. Lub tsev kawm ntawv muaj peb lub tsev kawm qib siab thiab 17 lub tsev kawm ntawv muab cov kev kawm xws li tshuaj, kev suav lej, thiab kev kawm txog tib neeg.
Lub tsev kawm ntawv qib siab nyob hauv Kanazawa, lub nroog nto moo rau nws keeb kwm thiab kab lis kev cai, ntawm ntug dej hiav txwv ntawm Hiav Txwv Nyiv. Txij li thaum lub sijhawm feudal (1598-1867), Kanazawa tau txaus siab rau lub koob npe nrov ntawm kev txawj ntse. Kanazawa University tau muab faib ua ob lub tsev kawm ntawv loj, Kakuma thiab Takaramachi, thiab muaj kwv yees li 10,200 tus tub ntxhais kawm, 600 tus ntawm lawv yog cov tub ntxhais kawm thoob ntiaj teb.
Saib cov ntsiab lus thawj: https://www.prnewswire.com/news-releases/kanazawa-university-research-enhancing-carbon-dioxide-reduction-301846809.html