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- W104088327 abstract "Single crystal catalysts have been used to investigate the methanation reaction over phosphided nickel surfaces. The apparatus used in these studies allows for catalyst preparation and surface characterization in ultrahigh vacuum (UHV) with an in vacuo transfer to a second UHV chamber designed for kinetics at elevated pressures. Kinetic studies on single crystals of nickel have shown the effect of sulfur to be strongly nonlinear where one sulfur atom effectively deactivates ten or more nickel surface atoms. These studies have addressed the role of ensemble effects as opposed to electronic effects in the deactivation mechanism. Studies similar to the previous ones for sulfur have been carried out for phosphorus. These data show phosphorus to be much less effective in attenuating the nickel catalytic activity for methanation. The reduced severity of the poisoning by phosphorus is attributed to its lower electronegativity. These results are consistent with an electronic effect playing a significant role in the poisoning of nickel methanation activity by sulfur." @default.
- W104088327 created "2016-06-24" @default.
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- W104088327 date "1985-01-01" @default.
- W104088327 modified "2023-09-28" @default.
- W104088327 title "Impurity modification of surface catalyzed reactions: Methanation over phosphided nickel" @default.
- W104088327 hasPublicationYear "1985" @default.
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