STM observation of the chemical reaction of atomic hydrogen on the N-adsorbed Cu(001) surface

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• 作者：Takuma Hattori ; ^{thattori@issp.u-tokyo.ac.jp} ; Masamichi Yamada ; Fumio Komori ^{komori@issp.u-tokyo.ac.jp}
• 关键词：Reaction ; STM ; Cu(001) ; Ammonia synthesis ; Atomic hydrogen ; Nitrogen
• 刊名：Surface Science
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：655
• 期：Complete
• 页码：1-6
• 全文大小：1766 K
• 卷排序：655

文摘

Chemical reaction of atomic hydrogen with the N-adsorbed Cu(001) surfaces was investigated at room temperature by scanning tunnel microscopy. At the low exposure of atomic hydrogen, it reacted with the N atoms and turned to be the NH species on the surface. The reaction rate is proportional to the amount of the unreacted N atoms. By increasing the exposure of atomic hydrogen from this condition, the amount of nitrogen species on the surface decreased. This is attributed to the formation of ammonia and its desorption from the surface. The NH species on the surface turn to NH3 through the surface NH2 species by atomic hydrogen. Coexistence of the clean Cu surface enhances the rate of ammonia formation owing to atomic hydrogen migrating on the clean surface.