Effe ct of Cu in sertion o n the stru cture and electronic properties of small Rh clusters: A DFT study

Studie s of small c lusters by D FT methods have recei ved a good deal of attentions in th e past decade because of their unique catalytic properties [۱, ۲]. Much attention has been p aid to theoretical study of monometallic clusters while bi metallic clus ters and their application in catalytic reactions are less theoretically studied [۲]. Usually thecatal ytic activities of bimet allic surface s are high er than mo nometallic s urfaces bec ause of both structural and electr onic effects [۲]. In the present study we emplo yed B۳PW۹۱ method to investigate the struct ure and energetic of Rhx Cu۴-x (x= ۰-۴) small cl usters. Also, effect of Cu insertion o n the stability and the tendency to exchange electron of cl usters were explained on the basis of the calculated parameters such as binding energy (BE), ionization p otential (IP), electron affinity (EA), and chemic al hardness.

کلیدواژه ها:

Rh-Cu clusters ، D FT ، structure ، stability ، chemical hardness