Adsorption of CO on, and S poisoning of, a perfect Ni(111) single crystal and a Ni(111) crystal with small angle boundaries
作者： Gordon A. Sargent , Garth B. Freeman , James Lih-Ren Chao
DOI: 10.1016/0039-6028(80)90377-5
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摘要: Abstract A Ni(111) crystal with small angle boundaries was used to examine the adsorption of CO. The CO on a perfect single for reference. Auger spectra show that boundary lines sample surface provide favorable sites adsorbed dissociate at temperatures as low 25°C. post-dissociation carbon appears mostly in form nickel carbide surface. After heating 850°C, sulfur diffused and blocked uniformly. boundary-enhanced dissociation absorbed is no longer observed after diffusion AES depth profiling concentration different positions respect evidence an enhanced path diffusion.
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