Umgangatho omtsha wetekhnoloji ye-hydrogen eluhlaza ebekwe ziinjineli zeYunivesithi yaseRice.
Iinjineli zeYunivesithi yaseRice zinokujika ukukhanya kwelanga kwihydrogen ngobuchule bokwaphula irekhodi kwisixhobo esidibanisa isizukulwana esilandelayo ihalide perovskite semiconductors* nge ii-electrocatalysts kwisixhobo esinye, esomeleleyo, esineendleko ezifanelekileyo kunye nesixhobo esinokwehla.
Ngoku ka isifundo epapashwe kuNxibelelwano lweNdalo, isixhobo siphumelele i-20.8% ye-solar-to-hydrogen yokuguqulwa kakuhle.
Itekhnoloji entsha linyathelo elibalulekileyo eliya phambili kumandla acocekileyo kwaye lingasebenza njengeqonga loluhlu olubanzi lweempendulo zemichiza ezisebenzisa umbane ovuniweyo welanga ukuguqula. feedstocks kumafutha.
Ilebhu yeekhemikhali kunye nenjineli ye-biomolecular Aditya Mohite yakha i-photoreactor edibeneyo isebenzisa isithintelo se-anticorrosion esikhusela i-semiconductor emanzini ngaphandle kokuthintela ukuhanjiswa kwee-electron.
"Ukusebenzisa ukukhanya kwelanga njengomthombo wamandla wokuvelisa imichiza ngomnye weyona miqobo inkulu kuqoqosho lwamandla acocekileyo," utshilo u-Austin Fehr, umfundi ogqirha wemichiza kunye ne-biomolecular yobunjineli kunye nomnye wababhali abakhokelayo kwisifundo.
“Injongo yethu kukwakha amaqonga anoqoqosho anokuvelisa amafutha elanga. Apha, siyile inkqubo efunxa ukukhanya kwaye igqibezele i-electrochemical chemistry yokwahlula amanzi ebusweni bayo.”
Isixhobo saziwa njengeseli ye-photoelectrochemical ngenxa yokuba ukufunxwa kokukhanya, ukuguqulwa kwayo ibe ngumbane kunye nokusetyenziswa kombane ukunika amandla ukusabela kweekhemikhali zonke zenzeka kwisixhobo esinye. Ukuza kuthi ga ngoku, ukusebenzisa itekhnoloji ye-photoelectrochemical ukuvelisa i-hydrogen eluhlaza kwathintelwa kukusebenza okuphantsi kunye neendleko eziphezulu ze-semiconductors.
"Zonke izixhobo zolu hlobo zivelisa i-hydrogen eluhlaza zisebenzisa ukukhanya kwelanga kunye namanzi kuphela, kodwa eyethu iyingqayizivele ngenxa yokuba inomsebenzi wokurekhoda kwaye isebenzisa i-semiconductor ephantsi kakhulu," kusho uFehr.
The Ilebhu yaseMohite kunye nabasebenzisana nabo benza isixhobo ngokuguqula zabo iseli yelanga enokhuphiswano kakhulu kwisixhobo sombane esinokusebenzisa amandla okuvuna ukwahlula amanzi abe yioksijini kunye nehydrogen.
Umceli mngeni ekwakufuneka bawoyise yayikukuba i-halide perovskites* azinzanga ngokugqithisileyo emanzini kwaye iingubo zokugquma ezisetyenziselwa ukugquma i-semiconductors ziphela ziphazamisa umsebenzi wazo okanye ziyonakalise.
“Kule minyaka mibini idlulileyo, siye sabuya sibuya siphinda sizama izinto ezahlukeneyo kunye nobuchule,” utshilo UMichael Wong, injineli yeekhemikhali zeRice kunye nombhali-mbhali kwisifundo.
Emva kokuba iimvavanyo ezinde zisilele ukuvelisa iziphumo ebezifunwa, abaphandi baye bafumana isisombululo esiphumeleleyo.
"Ingqiqo yethu ephambili yayikukuba udinga iileyile ezimbini kwisithintelo, enye yokuthintela amanzi kunye nomnye ukwenza uqhagamshelwano olufanelekileyo lombane phakathi kwee-perovskite layers kunye nokukhusela," kusho uFehr.
"Iziphumo zethu zezona zisebenzayo kwiiseli ze-photoelectrochemical ngaphandle koxinzelelo lwelanga, kunye neyona nto ingcono kakhulu kwabo basebenzisa i-halide perovskite semiconductors.
"Yeyokuqala kwintsimi ebikade ilawulwa zii-semiconductors ezibiza kakhulu, kwaye inokumela indlela eya kubanakho urhwebo kolu hlobo lwesixhobo okokuqala," utshilo uFehr.
Abaphandi babonise uyilo lwabo lomqobo lusebenzele iimpendulo ezahlukeneyo kunye neesemiconductors ezahlukeneyo, besenza ukuba sisebenze kuzo zonke iinkqubo ezininzi.
"Siyathemba ukuba iinkqubo ezinjalo ziya kusebenza njengeqonga lokuqhuba uluhlu olubanzi lwee-electron kwi-fuel-forming reactions usebenzisa i-feedstocks eninzi kunye nokukhanya kwelanga njengegalelo lamandla," kusho uMohite.
"Ngolunye uphuculo lokuzinza kunye nokulinganisa, le teknoloji inokuvula uqoqosho lwe-hydrogen kwaye iguqule indlela abantu abazenza ngayo izinto kwi-fossil fuel ukuya kwi-solar fuel," wongezelela uFehr.
Perovskite - Le mineral ine-conductivity ephezulu kune-silicon kwaye iyancipha. Ikwaxhaphake kakhulu eMhlabeni. Kule minyaka ilishumi idlulileyo, iinzame ezinkulu zikhokelele kuphuhliso olumangalisayo, kodwa ukwamkelwa kwayo kwi-optoelectronics yexesha elizayo kuhlala kungumngeni.
Iiseli ze-photovoltaic zePerovskite azikazinzi kwaye ziguga ngaphambi kwexesha. Ngaphezu koko, ziqulethe ilothe, izinto eziyingozi kakhulu kwindalo kunye nempilo yabantu. Ngenxa yezi zizathu, iiphaneli azikwazi ukuthengiswa.
I-Halogenated hybrid perovskites Iklasi yezixhobo ze-semiconductor eziye zagxininiswa kuphando oluthile kwiminyaka yamuva nje kwiipropati zabo eziphawulekayo ze-photoelectric kunye nezicelo zabo kwiinkqubo ze-photovoltaic.
