Abaphandi be-VCU bafumanise isikhuthazo esisebenzayo sokuguqulwa kwe-carbon dioxide kwi-formic acid kwi-thermochemical - ukufunyanwa okunokubonelela ngesicwangciso esitsha sokubamba ikhabhoni esinokuncitshiswa njengoko ihlabathi lijongene notshintsho lwemozulu. Iarhente enokuba luncedo kwikhabhoni dioxide esemoyeni.
“Kuyaziwa ukuba ukukhula ngokukhawuleza kweegesi ezibangela ubushushu emoyeni kunye nemiphumo yazo emibi kwindalo esingqongileyo yenye yeengxaki ezinkulu ezijongene noluntu namhlanje,” utshilo umbhali okhokelayo uGqr. Shiv N. Khanna, uNjingalwazi weCommonwealth Emeritus kwicandelo lefiziksi kwiFakhalthi yoLuntu i-VCU. “Ukuguqulwa kwe-CO2 kwiikhemikhali eziluncedo ezifana ne-formic acid (HCOOH) sisicwangciso esingabizi kakhulu sokunciphisa iziphumo ezimbi ze-CO2. I-Formic acid lulwelo olunetyhefu ephantsi okulula ukuluthutha nokuyigcina kubushushu obuqhelekileyo. Ingasetyenziswa kwakhona njenge-precursor yekhemikhali eyongeziweyo ngexabiso eliphezulu, i-carrier yokugcina i-hydrogen, kunye ne-alternative fuel ye-fossil kwixesha elizayo.”
UHanna kunye nososayensi ophanda nge-VCU uGqr. Turbasu Sengupta bafumanise ukuba amaqela adibeneyo e-chalcogenides yesinyithi anokusebenza njengee-catalysts zokuguqulwa kwe-CO2 ibe yi-formic acid kwi-thermochemical. Iziphumo zabo zichazwe kwiphepha elinesihloko esithi “Ukuguqulwa kwe-CO2 ibe yi-Formic Acid ngokuLungisa ii-Quantum States kwi-Metal Chalcogenide Clusters” epapashwe kwi-Communications Chemistry of Nature Portfolio.
“Sibonise ukuba, ngokudityaniswa kakuhle kwee-ligands, umqobo wokuphendula ekuguquleni i-CO2 ibe yi-formic acid unokwehliswa kakhulu, nto leyo ekhawulezisa kakhulu ukuveliswa kwe-formic acid,” utshilo uHanna. “Ngoko ke singatsho ukuba ezi catalysts zinokuthiwa zingenza ukwenziwa kwe-formic acid kube lula okanye kube nokwenzeka ngakumbi. Ukusetyenziswa kwamaqela amakhulu aneendawo ezininzi zokubopha ii-ligand okanye ngokuncamathisela ii-donor ligands ezisebenzayo kuhambelana nophuculo lwethu oluthe kratya ekuguqulweni kwe-formic acid kunokufezekiswa ngaphezu koko kuboniswe kwiimodeli zokubala.”
Olu phononongo lwakhela kumsebenzi kaHanna wangaphambili obonisa ukuba ukhetho olufanelekileyo lwe-ligand lunokuguqula iqela libe yi-superdonor enikela ngee-electron okanye i-acceptor eyamkela ii-electron.
“Ngoku sibonisa ukuba isiphumo esifanayo sinamandla amakhulu kwi-catalysis esekelwe kwii-clusters ze-metal chalcogenide,” utshilo uHanna. “Ubuchule bokudibanisa amaqela adibeneyo azinzileyo kunye nokulawula amandla awo okunikela okanye ukwamkela ii-electron buvula intsimi entsha ye-catalysis, kuba uninzi lwee-reactions ze-catalytic zixhomekeke kwii-catalysts ezinikela okanye ezamkela ii-electron.”
Omnye woososayensi bokuqala abavavanyayo kweli candelo, uGqr. Xavier Roy, uNjingalwazi oNcedisayo weKhemistri kwiYunivesithi yaseColumbia, uza kutyelela iVCU ngo-Aprili 7 kwiNgqungquthela yaseNtwasahlobo yeSebe leFiziksi.
“Siza kusebenza naye ukuze sibone ukuba singayiphuhlisa njani kwaye siqalise i-catalyst efanayo sisebenzisa ilebhu yakhe yovavanyo,” utshilo uHanna. “Sele sisebenzisana ngokusondeleyo neqela lakhe, apho bavelise khona uhlobo olutsha lwezinto ezitsala amandla. Ngeli xesha uza kuba yi-catalyst.”
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