Deng Xingyi, Verdaguer Albert, Herranz Tirma, Weis Christoph, Bluhm Hendrik, Salmeron Miquel
Materials Sciences Division, Lawrence Berkeley National Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, and Materials Science and Engineering Department, University of California, Berkeley, California 94720, USA.
Langmuir. 2008 Sep 2;24(17):9474-8. doi: 10.1021/la8011052. Epub 2008 Jul 23.
The chemical nature of copper and copper oxide (Cu 2O) surfaces in the presence of CO 2 and H 2O at room temperature was investigated using ambient pressure X-ray photoelectron spectroscopy. The studies reveal that in the presence of 0.1 torr CO 2 several species form on the initially clean Cu, including carbonate CO 3 (2) (-), CO 2 (delta-) and C (0), while no modifications occur on an oxidized surface. The addition of 0.1 ML Zn to the Cu results in the complete conversion of CO 2 (delta-) to carbonate. In a mixture of 0.1 torr H 2O and 0.1 torr CO 2, new species are formed, including hydroxyl, formate and methoxy, with H 2O providing the hydrogen needed for the formation of hydrogenated species.
利用常压X射线光电子能谱研究了室温下在二氧化碳和水存在的情况下铜及氧化亚铜（Cu₂O）表面的化学性质。研究表明，在存在0.1托二氧化碳的情况下，最初清洁的铜表面会形成几种物质，包括碳酸根CO₃²⁻、δ⁻态二氧化碳和零价碳，而氧化表面则没有变化。向铜中添加0.1单层的锌会导致δ⁻态二氧化碳完全转化为碳酸盐。在0.1托水和0.1托二氧化碳的混合物中，会形成新的物质，包括羟基、甲酸根和甲氧基，水为氢化物质的形成提供所需的氢。
