Video: Vim li cas cov oxidation kuj tseem ceeb hauv catalysis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Copper yog ib qho piv txwv zoo tshaj plaws ntawm kev hloov hlau nrog nws variable oxidation xeev Cu2+ thiab Cu3+. Hloov pauv hlau tuaj yeem muab thiab lees txais cov electrons yooj yim, yog li ua rau lawv muaj txiaj ntsig zoo li catalysts . Cov oxidation xeev ntawm ib tug hlau hais txog lub peev xwm ntawm cov hlau los tsim cov tshuaj bonds.
Kuj paub, vim li cas cov ntsiab lus hloov pauv muaj lub xeev oxidation sib txawv?
Hloov cov ntsiab lus qhia txog lub xeev oxidation sib txawv hauv lawv cov tebchaw vim tias muaj qhov sib txawv me me ntawm lub zog ntawm (n-1)d thiab ns orbitals. Raws li qhov tshwm sim, electrons ntawm (n-1)d orbitals nrog rau ns-orbitals koom nrog hauv kev tsim daim ntawv cog lus.
Dhau li saum toj no, dab tsi ua rau lub catalyst zoo? A zoo catalyst yuav tsum tau adsorb cov reactant molecules muaj zog txaus rau lawv los teb, tab sis tsis yog li ntawd cov khoom molecules lo ntau los yog tsawg mus tas li rau saum npoo. Silver, piv txwv li, tsis yog zoo catalyst vim nws tsis tsim muaj zog txaus attachments nrog reactant molecules.
Tsis tas li ntawd, vim li cas tooj liab yog catalyst?
Tooj -raws li catalysts yog dav siv nyob rau hauv tshuaj industries los hloov dej thiab carbon monoxide rau hydrogen, carbon dioxide, thiab methanol. Twj cov CO tawm mus desorbs cov molecules los ntawm qhov chaw, uas tom qab ntawd ua kom nquag plias rau cov kev cuam tshuam nrog dej dissociation.
Vim li cas Palladium yog ib qho zoo catalyst?
Qhov chaw ntawm palladium zoo heev catalysts rau cov tshuaj tiv thaiv uas muaj hydrogen thiab oxygen, xws li hydrogenation ntawm unsaturated organic compounds. Palladium yog reactive ntau dua li lwm cov platinum hlau. Piv txwv li, nws raug tawm tsam ntau dua los ntawm cov kua qaub dua li lwm cov platinum hlau.
Pom zoo:
Vim li cas thiaj tseem ceeb rau cov kws tshawb fawb nrhiav txoj hauv kev los npaj cov ntsiab lus?
Inventor: Dmitri Mendeleev
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