Dziko la Brazil ndilomwe limatulutsa niobium kwambiri padziko lonse lapansi ndipo lili ndi pafupifupi 98 peresenti ya nkhokwe zopezeka padziko lonse lapansi. Mankhwalawa amagwiritsidwa ntchito muzitsulo zazitsulo, makamaka zitsulo zolimba kwambiri, komanso pafupifupi zopanda malire za ntchito zamakono zamakono kuchokera ku mafoni a m'manja kupita ku injini za ndege. Brazil imatumiza kunja kwa niobium yambiri yomwe imapanga ngati zinthu monga ferronobium.

Chinthu china ku Brazil chilinso chochulukirachulukira koma chosagwiritsidwa ntchito mocheperapo ndi glycerol, chopangidwa ndi mafuta ndi mafuta a saponification mumakampani a sopo ndi zotsukira, komanso kusintha kwa transesterification mumakampani amafuta amafuta. Pamenepa zinthu zimakhala zovuta kwambiri chifukwa glycerol nthawi zambiri imatayidwa ngati zinyalala, ndipo kutaya koyenera kwa ma volumes ambiri kumakhala kovuta.

Kafukufuku wopangidwa ku Federal University of the ABC (UFABC) ku São Paulo State, Brazil, adaphatikiza niobium ndi glycerol munjira yodalirika yaukadaulo yopangira ma cell amafuta. Nkhani yofotokoza kafukufukuyu, mutu wakuti "Niobium imawonjezera ntchito ya electrocatalytic Pd m'maselo amafuta a alkaline mwachindunji a glycerol," idasindikizidwa mu ChemElectroChem ndipo yawonetsedwa pachikuto cha magazini.

"M'malo mwake, cell imagwira ntchito ngati batire lopangidwa ndi glycerol kuti liziwonjezeranso zida zazing'ono zamagetsi monga mafoni am'manja kapena laputopu. Itha kugwiritsidwa ntchito m'malo osalumikizidwa ndi gridi yamagetsi. Pambuyo pake lusoli likhoza kusinthidwa kuti lizitha kuyendetsa magalimoto amagetsi komanso ngakhale kupereka mphamvu m'nyumba. Pali ntchito zopanda malire zomwe zingatheke pamapeto pake, "wasayansi Felipe de Moura Souza, wolemba woyamba wa nkhaniyi adanena. Souza ali ndi maphunziro a doctorate mwachindunji kuchokera ku São Paulo Research Foundation-FAPESP.

Mu selo, mphamvu ya mankhwala kuchokera ku glycerol oxidation reaction mu anode ndi mpweya wochepetsetsa mpweya mu cathode imasandulika magetsi, ndikusiya mpweya wa carbon ndi madzi monga zotsalira. Zomwe zimachitika ndi C3H8O3 (glycerol yamadzimadzi) + 7/2 O2 (gesi wa oxygen) → 3 CO2 (mpweya wa carbon) + 4 H2O (madzi amadzimadzi). Chiwonetsero chadongosolo la ndondomekoyi chikuwonetsedwa pansipa.

"Niobium [Nb] imagwira nawo ntchito ngati co-catalyst, kuthandiza ntchito ya palladium [Pd] yomwe imagwiritsidwa ntchito ngati mafuta a cell anode. Kuwonjezera kwa niobium kumapangitsa kuti palladium ikhale ndi theka, kuchepetsa mtengo wa selo. Pa nthawi yomweyo kwambiri kumawonjezera mphamvu ya selo. Koma chothandizira chake chachikulu ndikuchepetsa poizoni wa electrolytic wa palladium womwe umabwera chifukwa cha makutidwe ndi okosijeni apakati omwe amadsorbed kwambiri pakugwira ntchito kwa nthawi yayitali kwa selo, monga mpweya wa monoxide, "anatero Mauro Coelho dos Santos, pulofesa ku UFABC. , mlangizi wanthano ya udokotala wachindunji wa Souza, komanso wofufuza wamkulu pa kafukufukuyu.

Malinga ndi chilengedwe, chomwe chikuyenera kukhala chofunikira kwambiri pazisankho zaukadaulo kuposa kale lonse, glycerol cell cell imawonedwa ngati yankho labwino chifukwa imatha kulowa m'malo mwa injini zoyatsira zoyendetsedwa ndi mafuta oyaka.