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Enhancement of hydrolysis in alkali ultrathin layers on metal substrates in the presence of electron confinement

机译:在电子约束条件下增强金属基材上碱金属超薄层中的水解

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摘要

Vibrational spectroscopy has been used to study the interaction at room temperature of H_2O with ultrathin alkali films grown on Cu(1 1 1), Ni(1 1 1) and Ag/Ni(1 1 1). We find strongly enhanced dissociation efficiency in the monolayer regime of Na/Cu(1 1 1), indicative of an active role of the existing Na-derived quantum wells in hydrolysis. No water adsorption has been observed for alkalis (Na, K) adsorbed on Ni(1 1 1), very likely due to the absence of electron confinement in these systems. On the other hand, partial water dissociation has been revealed in K-doped silver thin layers on Ni(1 1 1), in the presence of Ag 5sp-derived quantum wells.
机译:振动光谱已用于研究H_2O在室温下与在Cu(1 1 1),Ni(1 1 1)和Ag / Ni(1 1 1)上生长的超薄碱膜的相互作用。我们发现Na / Cu(1 1 1)的单层体系中的解离效率大大提高,表明现有的钠衍生量子阱在水解中的积极作用。没有观察到水被吸附在Ni(1 1 1)上的碱(Na,K)吸附,这很可能是由于这些系统中没有电子约束。另一方面,在存在Ag 5sp衍生的量子阱的情况下,在Ni(1 1 1)上的K掺杂银薄层中发现了部分水离解。

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