Isiqhema serhubhululo se-German senze ama-supercrystals anemikhakha emibili aneempawu ezihle khulu zokuvuselela. Zingasetjenziselwa ukukhiqiza i-hydrogen ngokubola kwe-formic acid, ngemiphumela erekhodiweko.
Abososayensi abadoswa phambili yi-Ludwig Maximilian University of Munich (LMU Munich) e-Germany benze ithekhnoloji ye-photocatalytic yokukhiqiza i-hydrogen esekelwe kuma-supercrystals we-plasma bimetallic amabili.
Abarhubhululi bahlanganisa izakhiwo ze-plasmonic ngokuhlanganisa ama-nanoparticles wegolide (ama-AuNP) kanye nama-nanoparticles weplatinamu (ama-PtNPs).
Umrhubhululi u-Emiliano Cortes wathi: "Ukuhleleka kwama-nanoparticles wegolide kusebenza kuhle khulu ekugxiliseni ukukhanya okufikako begodu kukhiqize amasimu wegezi aqinileko wendawo, okubizwa ngokuthi ziindawo ezitjhisako, ezakha hlangana nama-particles wegolide."
Ekuhlelweni kwehlelo eliphakanyisiweko, ukukhanya okubonakalako kusebenzisana ngamandla khulu nama-elekthronikhi ensimbini begodu kwenza bona athuthumele ngokuzwakalako, okwenza bona ama-elekthronikhi ahambe ngokurhaba ukusuka kwelinye ihlangothi le-nanoparticle ukuya kwelinye. Lokhu kwenza uzibuthe omncani iingcwethi ezibiza ngokuthi mzuzu we-dipole.
Ngumkhiqizo wobukhulu betjhaji kanye nebanga hlangana namaziko wamatjhaji amahle namambi. Lokha nakwenzeka lokhu, ama-nanoparticles abamba ukukhanya kwelanga okunengi bese akutjhugulula abe ma-elektroni anamandla khulu. Zirhelebha ukulawula ukusabela kwamakhemikhali.
Umphakathi wezefundo uhlole ukusebenza kwama-plasmonic bimetallic 2D supercrystals ekuboleni i-formic acid.
"I-probe reaction yakhethwa ngombana igolide ayisebenzi kangako ukudlula iplatinamu begodu ngombana iyisithwali se-H2 esingathathi ihlangothi," batjho njalo.
"Ukusebenza okuthuthukisiweko kweplatinamu ngaphasi kokukhanya kuveza bona ukusebenzisana kokukhanya okungenako ne-array yegolide kuphumela ekwakhiweni kweplatinamu ngaphasi kwevoltheji," batjho njalo. "Kwamambala, lokha i-formic acid nayisetjenziswa njengesithwali se-H2, ama-supercrystals we-AuPt abonakala anekghono elihle khulu le-plasma."
Ikristalu itjengise izinga lokukhiqizwa kwe-H2 elingu-139 mmol ngegremu ye-catalyst nge-awa. Isiqhema serhubhululo sathi lokhu kutjho bona izinto ezisebenzisa i-photocatalytic sele ziphethe irekhodi lephasi loke lokukhiqiza i-hydrogen ngokukhipha i-formic acid ngaphasi kwethonya lokukhanya okubonakalako nemisebe yelanga.
Abososayensi bahlongoza isisombululo esitjha ephepheni elithi "Plasmonic bimetallic 2D supercrystals for hydrogen generation," esanda kugadangiswa kujenali i-Nature Catalice. Isiqhema sifaka hlangana abarhubhululi abavela e-Free University of Berlin, i-University of Hamburg kanye ne-University of Potsdam.
"Ngokuhlanganisa ama-plasmon nama-catalytic metals, sithuthukisa ukuthuthukiswa kwama-photocatalysts anamandla wokusetjenziswa emabubulweni. Le yindlela etja yokusebenzisa ukukhanya kwelanga begodu inamandla wezinye iindlela, njengokutjhugulula i-carbon dioxide ibe zizinto eziwusizo," kutjho u-Cole Thes. .
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