Gulu lofufuza la ku Germany lapanga ma supercrystals a bimetallic awiri-dimensional okhala ndi mphamvu zabwino kwambiri zoyambitsa. Angagwiritsidwe ntchito kupanga hydrogen mwa kuwononga formic acid, ndipo zotsatira zake zinali zodabwitsa kwambiri.
Asayansi otsogozedwa ndi Ludwig Maximilian University of Munich (LMU Munich) ku Germany apanga ukadaulo wa photocatalytic wopanga hydrogen kutengera ma plasma bimetallic two-dimensional supercrystals.
Ofufuzawo adasonkhanitsa kapangidwe ka plasmonic mwa kuphatikiza tinthu tating'onoting'ono tagolide tokha (AuNPs) ndi tinthu tating'onoting'ono ta platinamu (PtNPs).
Wofufuza Emiliano Cortes anati: “Kapangidwe ka tinthu tating’onoting’ono ta golide n’kothandiza kwambiri poika kuwala kochitika komanso kupanga magetsi amphamvu am’deralo, otchedwa malo otentha, omwe amapanga pakati pa tinthu ta golide.”
Mu dongosolo lomwe laperekedwa, kuwala kooneka kumalumikizana mwamphamvu kwambiri ndi ma elekitironi omwe ali mu chitsulocho ndipo kumapangitsa kuti agwedezeke mozungulira, zomwe zimapangitsa kuti ma elekitironi aziyenda mwachangu kuchokera mbali imodzi ya nanoparticle kupita ku inayo. Izi zimapanga maginito ang'onoang'ono omwe akatswiri amatcha nthawi ya dipole.
Ndi chipatso cha kukula kwa mphamvu ndi mtunda pakati pa malo a mphamvu zabwino ndi zoipa. Izi zikachitika, tinthu tating'onoting'ono timatenga kuwala kwa dzuwa kwambiri ndikusandulika kukhala ma elekitironi amphamvu kwambiri. Zimathandiza kuwongolera zochita za mankhwala.
Gulu la akatswiri a zamaphunziro layesa momwe ma plasmonic bimetallic 2D supercrystals amagwirira ntchito powola formic acid.
"Njira yofufuzirayi idasankhidwa chifukwa golide sagwira ntchito kwambiri poyerekeza ndi platinamu komanso chifukwa ndi chonyamulira cha H2 chomwe sichimakhudzidwa ndi mpweya," adatero.
"Kugwira ntchito bwino kwa platinamu pansi pa kuwala kukusonyeza kuti kuyanjana kwa kuwala kwadzidzidzi ndi gulu lagolide kumapangitsa kuti platinamu pansi pa mphamvu yamagetsi ipangidwe," adatero. "Zoonadi, pamene formic acid ikugwiritsidwa ntchito ngati chonyamulira cha H2, makristalo a AuPt amawoneka kuti ali ndi magwiridwe antchito abwino kwambiri a plasma."
Kristaloyo inasonyeza kuchuluka kwa H2 komwe kumapangidwa ndi 139 mmol pa gramu imodzi ya catalyst pa ola limodzi. Gulu lofufuza linati izi zikutanthauza kuti zinthu zopanga kuwala kwa dzuwa tsopano zili ndi mbiri yapadziko lonse yopangira haidrojeni mwa kuchotsa hydrogen mu asidi wa formic mothandizidwa ndi kuwala kooneka ndi kuwala kwa dzuwa.
Asayansiwa akupereka yankho latsopano mu pepala lakuti “Plasmonic bimetallic 2D supercrystals for hydrogen generation,” lomwe lafalitsidwa posachedwapa mu magazini ya Nature Catalice. Gululi likuphatikizapo ofufuza ochokera ku Free University of Berlin, University of Hamburg ndi University of Potsdam.
"Mwa kuphatikiza ma plasmon ndi zitsulo zoyambitsa, tikupititsa patsogolo chitukuko cha ma photocatalyst amphamvu ogwiritsidwa ntchito m'mafakitale. Iyi ndi njira yatsopano yogwiritsira ntchito kuwala kwa dzuwa ndipo ilinso ndi kuthekera kwa zochita zina, monga kusintha carbon dioxide kukhala zinthu zothandiza," adatero Cole Thes.
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