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´óÁ¬»¯ÎïËùÕÅÌεÄһƪÎÄÏ×£ºBimetallic Au−Pd Alloy Catalysts for N2O Decomposition Effects of Surface Structures on Catalytic Activity¡£ÖÐÓÐÒ»¶Î·Ò벻ͨ˳£¬Àí½â²»ÁË£¬Ï£Íû³æÓѰï°ïÎÒ°¡£¡ºÜ׿±°¡ The chemisorption of O2 shows that both the adsorption heat and the saturation uptake decrease with an increase of Au/Pd ratio, suggesting alloying Pd with gold will facilitate the desorption of oxygen adatoms as O2, which is generally the rate-determining step for N2O decomposition reaction. Theoretical investigations using periodic DFT methods confirm the tunable O2 desorption ability by alloying Pd with Au and indicate that contiguously located Pd sites are indispensable for N2O decomposition because they function as the active sites for the elementary step of N2O decomposition into N2 and oxygen adatom, which becomes the rate-determining step over the Au−Pd alloy catalysts. [ Last edited by pzypdl on 2013-4-5 at 23:39 ] |
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