Dab tsi yog ib qho khoom muaj txiaj ntsig hlau catalyst?
Precious hlau catalysts, raws li lub npe qhia, siv precious hlau raws li lub active ingredient thiab monolithic ceramics xws li alumina raws li kev txhawb nqa. Lawv yog cov catalysts tsim los hloov tus nqi ntawm cov tshuaj tiv thaiv tsis tau koom nrog cov tshuaj tiv thaiv nws tus kheej.
Cov khoom siv hlau muaj txiaj ntsig zoo yog cov khoom siv hlau muaj txiaj ntsig uas tuaj yeem hloov kho tus nqi ntawm cov tshuaj tiv thaiv tshuaj tsis tau koom nrog hauv cov khoom kawg. Yuav luag txhua cov hlau tseem ceeb tuaj yeem siv los ua cov khoom siv hluav taws xob, tab sis platinum, palladium, rhodium, nyiaj, thiab ruthenium feem ntau siv, nrog platinum thiab rhodium yog siv dav tshaj plaws. Lawv cov d-electron orbitals tsis puv, ua rau lawv qhov chaw muaj adsorbing reactants. Lub zog nruab nrab ntawm cov orbitals no pab txhawb kev tsim ntawm nruab nrab "active compounds," uas ua rau muaj kev ua haujlwm siab catalytic. Tsis tas li ntawd, lawv muaj cov khoom zoo heev xws li siab -kub tsis kam, oxidation tsis kam, thiab corrosion kuj, ua rau lawv cov khoom tseem ceeb tshaj plaws catalyst.
