Iqela lophando laseJamani liphuhlise ii-supercrystals ezinemilinganiselo emibini ezineempawu ezintle kakhulu zokutsala amandla. Zingasetyenziswa ukuvelisa i-hydrogen ngokubolisa i-formic acid, kwaye iziphumo zirekhodiwe.
Izazinzulu ezikhokelwa yiLudwig Maximilian University of Munich (LMU Munich) eJamani ziye zaphuhlisa iteknoloji ye-photocatalytic yokuvelisa i-hydrogen esekelwe kwi-plasma bimetallic two-dimensional supercrystals.
Abaphandi bahlanganise izakhiwo zeplasmonic ngokudibanisa ii-nanoparticles zegolide nganye (ii-AuNPs) kunye nee-nanoparticles zeplatinum (ii-PtNPs).
Umphandi u-Emiliano Cortes uthe: “Ulungiselelo lwee-nanoparticles zegolide lusebenza kakhulu ekugxileni ukukhanya kwesiganeko kunye nokuvelisa amasimi ombane aqinileyo asekuhlaleni, abizwa ngokuba zii-hot spots, abumba phakathi kwee-particles zegolide.”
Kwisimo senkqubo esicetywayo, ukukhanya okubonakalayo kusebenzisana kakhulu nee-elektroni ezikwisinyithi kwaye kubangela ukuba zingcangcazele ngokuvakalayo, nto leyo ebangela ukuba ii-elektroni zihambe ngokukhawuleza ukusuka kwelinye icala le-nanoparticle ukuya kwelinye. Oku kudala imagnethi encinci iingcali eziyibiza ngokuba yi-dipole moment.
Yimveliso yobukhulu betshaja kunye nomgama ophakathi kwamaziko eetshaja ezilungileyo nezingalunganga. Xa oku kusenzeka, ii-nanoparticles zibamba ukukhanya kwelanga okungakumbi kwaye zikuguqula kube zii-electron ezinamandla kakhulu. Zinceda ekulawuleni iimpembelelo zeekhemikhali.
Uluntu lwezemfundo luye lwavavanya ukusebenza kakuhle kwee-plasmonic bimetallic 2D supercrystals ekuboleni i-formic acid.
“Impendulo yeprobe ikhethwe kuba igolide ayisebenzi kangako kuneplatinum kwaye kuba yinkampani ye-H2 engenakhabhoni,” batsho.
“Ukusebenza ngcono kweplatinum phantsi kokukhanya kubonisa ukuba ukusebenzisana kokukhanya okukhawulezileyo kunye ne-gold array kubangela ukwakheka kweplatinum phantsi kombane,” batsho. “Enyanisweni, xa i-formic acid isetyenziswa njenge-H2 carrier, ii-AuPt supercrystals zibonakala zisebenza kakuhle kwi-plasma.”
Ikristale ibonise izinga lokuveliswa kwe-H2 eliyi-139 mmol ngegram ye-catalyst ngeyure. Iqela lophando lithe oku kuthetha ukuba izinto ezisebenzisa i-photocatalytic ngoku zibambe irekhodi lehlabathi lokuvelisa i-hydrogen ngokususa i-hydrogen kwi-formic acid phantsi kwempembelelo yokukhanya okubonakalayo kunye nemitha yelanga.
Ezi ngcali zicebisa isisombululo esitsha kwiphepha elithi “Plasmonic bimetallic 2D supercrystals for hydrogen generation,” elisandula ukupapashwa kwiphephancwadi iNature Catalice. Eli qela liquka abaphandi abavela kwiYunivesithi yaseFree yaseBerlin, kwiYunivesithi yaseHamburg nakwiYunivesithi yasePotsdam.
“Ngokudibanisa iiplasmon kunye neentsimbi ezibangela ukonakala, siqhubela phambili uphuhliso lwee-photocatalysts ezinamandla kwizicelo zoshishino. Le yindlela entsha yokusebenzisa ukukhanya kwelanga kwaye ikwanakho nezinye iindlela zokusabela, njengokuguqula i-carbon dioxide ibe zizinto eziluncedo,” utshilo uCole Thes.
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