Identification of Hydroxyl Groups on Au Surfaces Formed by H2O(a) + O(a) Reaction

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• 作者：Zongfang Wu ; Zhiquan Jiang ; Yuekang Jin ; Feng Xiong ; Weixin Huang
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：November 13, 2014
• 年：2014
• 卷：118
• 期：45
• 页码：26258-26263
• 全文大小：353K
• ISSN：1932-7455

文摘

Water adsorption and reaction on an O(a)-covered Au(997) surface were comprehensively investigated by means of thermal desorption spectroscopy, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectroscopy. Adsorbed water is stabilized by O(a) adatoms on Au(997), and the surface reaction between H₂O(a) and O(a) occurs at 105 K to form surface hydroxyl groups that were unambiguously identified by their feature at 10.9 eV below the Fermi level in the UPS spectra. Upon heating, surface hydroxyl groups react to produce H₂O and O(a). These results elucidate the elementary surface reactions between water and oxygen adatoms on Au surfaces at the molecular level and greatly deepen the fundamental understanding of the unique role of water in Au-catalyzed oxidation reactions.