Asayansi akhala akudziwa kale kuti pulatinamu ndiyo njira yabwino kwambiri yogawa mamolekyu amadzi kuti apange mpweya wa haidrojeni. Kafukufuku watsopano wa ofufuza a ku Brown University akuwonetsa chifukwa chake platinamu imagwira ntchito bwino kwambiri - ndipo sichifukwa chake amaganiziridwa.

Kafukufuku, wofalitsidwa mu ACS Catalysis, amathandiza kuthetsa funso la kafukufuku wazaka pafupifupi zana, olembawo amati. Ndipo ingathandize kupanga zida zatsopano zopangira haidrojeni zomwe ndizotsika mtengo komanso zochulukirapo kuposa pulatinamu. Izi zitha kuthandizira kuchepetsa kutulutsa kwamafuta amafuta.

"Ngati titha kudziwa momwe tingapangire haidrojeni motsika mtengo komanso mogwira mtima, imatsegula chitseko cha njira zambiri zopangira mafuta ndi mankhwala opanda mafuta," adatero Andrew Peterson, pulofesa wothandizira ku Brown's School of Engineering komanso wolemba wamkulu wa kafukufukuyu. . Hydrojeni imatha kugwiritsidwa ntchito m'maselo amafuta, kuphatikiza ndi CO2 yochulukirapo kupanga mafuta kapena kuphatikiza nayitrogeni kupanga fetereza ya ammonia. Pali zambiri zomwe tingachite ndi haidrojeni, koma kuti madzi agawike gwero la haidrojeni, timafunikira chothandizira chotsika mtengo. ”

Kupanga zopangira zatsopano kumayamba ndikumvetsetsa zomwe zimapangitsa platinamu kukhala yapadera kwambiri pakuchita izi, Peterson akuti, ndipo ndizomwe kafukufuku watsopanoyu akufuna kudziwa.

Kupambana kwa Platinum kwakhala kukuchitika chifukwa cha mphamvu zake zomangira za "Goldilocks". Zothandizira zabwino zimagwiritsitsa mamolekyu osasunthika kapena molimba kwambiri, koma penapake pakati. Amangirirani mamolekyu momasuka kwambiri ndipo zimakhala zovuta kuti ayambe kuchitapo kanthu. Amangirireni molimba kwambiri ndipo mamolekyu amamatira pamwamba pa chothandizira, zomwe zimapangitsa kuti kukhale kovuta kumaliza. Mphamvu yomangirira ya haidrojeni pa pulatinamu imangokhalira kulinganiza bwino magawo awiri a madzi agawikana—ndipo asayansi ambiri amakhulupirira kuti ndi mkhalidwe umenewo umene umapangitsa platinamu kukhala wabwino kwambiri.

Koma panali zifukwa zokayikira ngati chithunzicho chinali cholondola, Peterson akuti. Mwachitsanzo, chinthu chotchedwa molybdenum disulfide (MoS2) chili ndi mphamvu yomangirira yofanana ndi platinamu, komabe ndi chothandizira kwambiri pakugawanika kwa madzi. Izi zikutanthauza kuti mphamvu zomanga sizingakhale nkhani yonse, Peterson akuti.

Kuti adziwe zimene zinkachitika, iye ndi anzake anafufuza mmene madzi amagawanika pazitsulo za pulatinamu pogwiritsa ntchito njira yapadera imene anapanga yoyerekezera mmene ma atomu ndi ma elekitironi amachitira pochita zinthu ndi electrochemical.

The kusanthula anasonyeza kuti maatomu haidrojeni kuti womangidwa pamwamba platinamu pa "Goldilocks" kumanga mphamvu si kwenikweni nawo anachita konse pamene mlingo anachita ndi mkulu. M'malo mwake, amadzimangirira m'mwamba mwa platinamu, momwe amangokhala osayang'ana. Ma atomu a haidrojeni omwe amatenga nawo gawo pakuchitapo kanthu amamangidwa mofooka kwambiri kuposa mphamvu ya "Goldilocks". Ndipo m'malo mokhala m'malo otchinga, amakhala pamwamba pa maatomu apulatinamu, pomwe amakhala omasuka kukumana kuti apange mpweya wa H2.

Ndiwo ufulu woyenda wa maatomu a haidrojeni pamtunda womwe umapangitsa kuti platinamu ikhale yotakasuka, ofufuzawo amaliza.

"Chomwe chimatiuza ndikuti kuyang'ana mphamvu zomangira za 'Goldilocks' si njira yoyenera yopangira chigawo chapamwamba," adatero Peterson. "Tikulangiza kuti kupanga zopangira zomwe zimayika haidrojeni m'malo oyenda kwambiri komanso ochita zinthu mwachangu ndi njira yoyenera."