The structure of water and water/hydroxyl phases at metal surfaces
소속 :
연사 : Prof. Andrew Hodgson (University of Liverpool, UK )
일시 : 2013-05-09 16:30 ~
장소 : 500동 목암홀
일 시 : 2013년 5월 9일, 4:30 PM
장 소 : 500동 목암홀
- Abstract-
Water–metal interfaces are of importance in scientific fields as diverse as corrosion, heterogeneous catalysis and electrocatalysis, but models for the water layer remain crude. Some key issues to understand are how water wets a surface, what is the structure of mixed water/hydroxyl layers and what effect this first layer has on the properties of the water–solid interface. Water layers are extremely delicate, held together by weak water-metal and water-water hydrogen bonds and small changes to the surface structure can introduce dramatic changes to its macroscopic properties, such as wetting. We have investigated how the detailed hydrogen bonding structure of water and mixed water/hydroxyl layers depends on the symmetry and reactivity of some simple metal surfaces. These experiments reveal a much richer, more complex picture of adsorption than originally anticipated, but some simple general considerations persist and provide new models for the structure of water and hydroxyl at metal surfaces, allowing us to anticipate and tailor the adsorption behaviour on more complex, templated surfaces.
장 소 : 500동 목암홀
- Abstract-
Water–metal interfaces are of importance in scientific fields as diverse as corrosion, heterogeneous catalysis and electrocatalysis, but models for the water layer remain crude. Some key issues to understand are how water wets a surface, what is the structure of mixed water/hydroxyl layers and what effect this first layer has on the properties of the water–solid interface. Water layers are extremely delicate, held together by weak water-metal and water-water hydrogen bonds and small changes to the surface structure can introduce dramatic changes to its macroscopic properties, such as wetting. We have investigated how the detailed hydrogen bonding structure of water and mixed water/hydroxyl layers depends on the symmetry and reactivity of some simple metal surfaces. These experiments reveal a much richer, more complex picture of adsorption than originally anticipated, but some simple general considerations persist and provide new models for the structure of water and hydroxyl at metal surfaces, allowing us to anticipate and tailor the adsorption behaviour on more complex, templated surfaces.
