Izinga elisha lobuchwepheshe be-hydrogen eluhlaza elibekwe onjiniyela base-Rice University.
Onjiniyela base-Rice University bangaphenduka ukukhanya kwelanga ku-hydrogen ngokusebenza kahle kokuphula irekhodi kudivayisi ehlanganisa isizukulwane esilandelayo i-halide perovskite semiconductors* Nge ama-electrocatalysts kudivayisi eyodwa, eqinile, engabizi futhi ekwazi ukukala.
Ngokuvumelana ne isifundo eshicilelwe ku-Nature Communications, idivayisi izuze u-20.8% wokuguqulwa kwe-solar kuya ku-hydrogen ukusebenza kahle.
Ubuchwepheshe obusha kuyisinyathelo esibalulekile esiya phambili samandla ahlanzekile futhi bungasebenza njengenkundla yezinhlobonhlobo zokusabela kwamakhemikhali esebenzisa ugesi ovunwa yilanga ukuze uguqule. feedstocks kumafutha.
Ilebhu kanjiniyela wamakhemikhali kanye ne-biomolecular Aditya Mohite wakha i-photoreactor ehlanganisiwe esebenzisa isivimbeli se-anticorrosion esivikela i-semiconductor emanzini ngaphandle kokuvimbela ukudluliswa kwama-electron.
"Ukusebenzisa ukukhanya kwelanga njengomthombo wamandla wokukhiqiza amakhemikhali kungenye yezithiyo ezinkulu emnothweni wamandla ahlanzekile," kusho u-Austin Fehr, umfundi ofundela ubudokotela bobunjiniyela bamakhemikhali kanye ne-biomolecular futhi ongomunye wababhali abahamba phambili ocwaningweni.
“Inhloso yethu wukwakha izinkundla ezisebenza kahle kwezomnotho ezikwazi ukuphehla amandla elanga. Lapha, siklame isistimu emunca ukukhanya futhi iqedele i-electrochemical ikhemikhali yokuhlukanisa amanzi ebusweni bayo.”
Idivayisi yaziwa njengeseli ye-photoelectrochemical ngoba ukumuncwa kokukhanya, ukuguqulwa kwayo kube ugesi kanye nokusetshenziswa kukagesi ukunika amandla ukusabela kwamakhemikhali konke kwenzeka kudivayisi efanayo. Kuze kube manje, ukusebenzisa ubuchwepheshe be-photoelectrochemical ukukhiqiza i-hydrogen eluhlaza kwakuphazanyiswa ukusebenza kahle okuphansi kanye nezindleko eziphezulu zama-semiconductors.
"Wonke amadivaysi alolu hlobo akhiqiza i-hydrogen eluhlaza esebenzisa ukukhanya kwelanga namanzi kuphela, kodwa eyethu iyingqayizivele ngoba inomsebenzi wokuqopha umlando futhi isebenzisa i-semiconductor eshibhile kakhulu," kusho uFehr.
The I-Mohite lab nabahlanganyeli bayo badale idivayisi ngokuguqula yabo iseli yelanga enokuncintisana kakhulu ibe yi-reactor engasebenzisa amandla avuniwe ukuhlukanisa amanzi abe umoya-mpilo ne-hydrogen.
Inselele okwakudingeka bayinqobe yayiwukuthi ama-halide perovskite* awazinzile ngokwedlulele emanzini futhi okokunamathela okusetshenziselwa ukuvikela ama-semiconductors kugcine kuphazamise ukusebenza kwawo noma ukuwalimaza.
“Eminyakeni emibili edlule, siye lehla senyuka sizama izinto zokwakha namasu ahlukene,” kusho UMichael Wong, unjiniyela wamakhemikhali elayisi kanye nomlobi ohlanganyele ocwaningweni.
Ngemuva kokuthi izivivinyo ezinde zihlulekile ukuveza umphumela abebewufuna, abacwaningi bagcine bethole isixazululo esiwinile.
"Ukuqonda kwethu okuyinhloko kwakuwukuthi udinga izendlalelo ezimbili emgodleni, omunye ukuvimbela amanzi kanye nokuxhumana okuhle kagesi phakathi kwezingqimba ze-perovskite kanye nesendlalelo sokuzivikela," kusho uFehr.
"Imiphumela yethu isebenza kahle kakhulu kumaseli e-photoelectrochemical ngaphandle kokugxila elanga, futhi ihamba phambili kakhulu kulabo abasebenzisa i-halide perovskite semiconductors.
"Kungokokuqala kwenkambu ebikade ibuswa ama-semiconductors abiza kakhulu, futhi ingase imele indlela eya ekubeni nokwenzeka kwezohwebo kulolu hlobo lwedivayisi okokuqala ngqa," kusho u-Fehr.
Abacwaningi bakhombise idizayini yabo yesithiyo isebenzele ukusabela okuhlukile kanye nama-semiconductors ahlukene, okwenza ukuthi isebenze kuwo wonke amasistimu.
"Sithemba ukuthi izinhlelo ezinjalo zizosebenza njengenkundla yokushayela izinhlobonhlobo zama-electron ekuphenduleni okwenza uphethiloli usebenzisa ama-feedstocks amaningi anokukhanya kwelanga kuphela njengokufakwa kwamandla," kusho uMohite.
"Ngokuthuthukiswa okuqhubekayo ekuzinzeni nasekulinganiseni, lobu buchwepheshe bungavula umnotho we-hydrogen futhi bushintshe indlela abantu abenza ngayo izinto kusukela kuphethiloli we-fossil kuya kuphethiloli welanga," wanezela uFehr.
I-Perovskite – Le mineral ine-conductivity ephakeme kune-silicon futhi ayintekenteke kancane. Futhi kuningi kakhulu eMhlabeni. Kule minyaka eyishumi edlule, imizamo emikhulu iholele entuthukweni emangalisayo, kodwa ukwamukelwa kwayo kuma-optoelectronics esizayo kuseyinselele.
Amaseli e-Perovskite photovoltaic awakazinzi futhi ayaguga ngaphambi kwesikhathi. Ngaphezu kwalokho, aqukethe umthofu, into eyingozi kakhulu emvelweni nempilo yabantu. Ngenxa yalezi zizathu, amaphaneli awakwazi ukuthengiswa.
I-Halogenated hybrid perovskites ziyikilasi lezinto ezisetshenziswayo ze-semiconductor obekugxilwe kuzo ocwaningweni oluthile eminyakeni yamuva ngenxa yezakhiwo zazo ezimangalisayo ze-photoelectric kanye nezicelo zazo ezinhlelweni ze-photovoltaic.
