Tus qauv tshiab rau ntsuab hydrogen thev naus laus zis tsim los ntawm Rice University engineers.
Rice University engineers tuaj yeem tig hnub ci rau hauv hydrogen nrog rau cov ntaub ntawv-tawg efficiency ua tsaug rau ib tug ntaus ntawv uas combines lwm tiam halide perovskite semiconductors* nrog electrocatalysts nyob rau hauv ib qho, ruaj, nqi-zoo thiab scalable ntaus ntawv.
raws li kev kawm luam tawm hauv Nature Communications, cov cuab yeej ua tiav 20.8% hnub ci-rau-hydrogen conversion efficiency.
Cov thev naus laus zis tshiab yog ib kauj ruam tseem ceeb rau pem hauv ntej rau lub zog huv thiab tuaj yeem ua lub platform rau ntau yam tshuaj lom neeg cov tshuaj tiv thaiv uas siv hluav taws xob hnub ci los hloov pauv. khoom noj khoom haus rau hauv roj.
Lab ntawm chemical thiab biomolecular engineer Aditya Mohite ua lub photoreactor integrated siv ib tug anticorrosion barrier uas insulates lub semiconductor los ntawm dej yam tsis muaj impeding kev hloov ntawm electrons.
Austin Fehr, tus kws kho mob tshuaj thiab biomolecular engineering kws kho mob cov tub ntxhais kawm hais tias "Siv lub hnub ci ua lub zog los tsim cov tshuaj yog ib qho ntawm cov teeb meem loj tshaj plaws rau kev lag luam huv huv," said Austin Fehr, tus kws kho mob tshuaj thiab biomolecular engineering tus kws kho mob thiab ib tus thawj coj ntawm kev tshawb fawb.
"Peb lub hom phiaj yog tsim kom muaj kev lag luam ua tau zoo platforms uas tuaj yeem tsim hluav taws xob los ntawm hnub ci. Ntawm no, peb tsim ib qho system uas nqus lub teeb thiab ua tiav electrochemical dej-splitting chemistry ntawm nws qhov chaw."
Cov cuab yeej hu ua photoelectrochemical cell vim qhov nqus ntawm lub teeb, nws hloov mus rau hauv hluav taws xob thiab kev siv hluav taws xob los ua hluav taws xob rau cov tshuaj tiv thaiv txhua yam tshwm sim hauv tib lub cuab yeej. Txog rau tam sim no, siv cov thev naus laus zis thev naus laus zis los tsim cov hydrogen ntsuab tau cuam tshuam los ntawm kev ua haujlwm qis thiab tus nqi siab ntawm semiconductors.
"Txhua yam khoom siv ntawm hom no tsim cov hydrogen ntsuab tsuas yog siv lub hnub ci thiab dej xwb, tab sis peb qhov tshwj xeeb vim nws muaj cov ntaub ntawv ua tau zoo thiab nws siv cov semiconductor uas pheej yig heev," Fehr hais.
cov Mohite lab thiab nws cov neeg koom tes tsim cov cuab yeej los ntawm kev tig lawv sib tw solar cell mus rau hauv lub reactor uas yuav siv tau lub zog los faib dej rau hauv oxygen thiab hydrogen.
Qhov kev sib tw uas lawv yuav tsum tau kov yeej yog tias halide perovskites * tsis ruaj tsis khov hauv dej thiab cov txheej txheem siv los thaiv cov khoom siv hluav taws xob tau xaus rau kev cuam tshuam lawv txoj haujlwm lossis ua rau lawv puas tsuaj.
"Nyob rau ob xyoos dhau los, peb tau rov qab mus sim cov khoom sib txawv thiab cov txheej txheem," said Michael Wong, Rice chemical engineer thiab co-sau ntawm txoj kev tshawb no.
Tom qab qhov kev sim siab ntev ua tsis tau raws li qhov xav tau, cov kws tshawb fawb thaum kawg tuaj hla kev daws teeb meem.
"Peb qhov kev pom tseem ceeb yog tias koj xav tau ob txheej rau qhov thaiv, ib qho los thaiv cov dej thiab ib qho los ua kom muaj hluav taws xob zoo ntawm cov txheej perovskite thiab txheej tiv thaiv," Fehr hais.
"Peb cov txiaj ntsig yog qhov ua tau zoo tshaj plaws rau cov cell photoelectrochemical yam tsis muaj hnub ci concentration, thiab qhov zoo tshaj plaws tag nrho rau cov neeg siv halide perovskite semiconductors.
"Nws yog thawj zaug rau thaj chaw uas muaj keeb kwm tau tswj hwm los ntawm kev txwv tsis pub kim kim semiconductors, thiab tuaj yeem sawv cev rau txoj hauv kev rau kev lag luam muaj peev xwm rau hom khoom siv no thawj zaug," Fehr hais.
Cov kws tshawb fawb tau pom tias lawv txoj kev thaiv kev tsim ua haujlwm rau kev sib txawv thiab nrog cov khoom siv sib txawv, ua rau nws siv tau rau ntau lub tshuab.
Mohite tau hais tias "Peb cia siab tias cov tshuab no yuav ua lub platform rau kev tsav tsheb ntau yam ntawm cov hluav taws xob rau cov hluav taws xob tsim hluav taws xob siv cov khoom noj uas muaj ntau nrog lub hnub ci tsuas yog lub zog nkag," Mohite tau hais.
"Nrog rau kev txhim kho ntxiv rau kev ruaj ntseg thiab nplai, cov thev naus laus zis no tuaj yeem qhib kev lag luam hydrogen thiab hloov txoj kev uas tib neeg ua khoom ntawm fossil roj mus rau hnub ci roj," Fehr ntxiv.
Perovskite - Cov pob zeb no muaj qhov ua tau zoo dua li silicon thiab tsis yooj yim dua. Nws kuj tseem muaj ntau dua nyob hauv ntiaj teb. Hauv kaum xyoo dhau los, kev siv zog ntau tau ua rau muaj kev txhim kho zoo kawg nkaus, tab sis nws txoj kev saws me nyuam hauv optoelectronics yav tom ntej tseem yog qhov nyuaj.
Perovskite photovoltaic cells tseem tsis ruaj khov thiab raug kev laus ntxov ntxov. Dab tsi ntxiv, lawv muaj cov hmoov lead, ib yam khoom uas tsim kev puas tsuaj rau ib puag ncig thiab tib neeg kev noj qab haus huv. Vim li no, cov panels tsis tuaj yeem ua lag luam.
Halogenated hybrid perovskites yog ib chav kawm ntawm cov khoom siv semiconductor uas tau ua kom pom tseeb ntawm kev tshawb fawb tshwj xeeb hauv xyoo tas los no rau lawv cov khoom siv hluav taws xob zoo tshaj plaws thiab lawv cov kev siv hauv photovoltaic systems.
