The reaction, described in the April 19th issue of Nature Materials, opens the door to the creation of novel functional catalysts and applications in clean energy production.
In recent years, the knowledge that materials exhibit novel properties at the nano-scale has driven a search for functional nano-materials with useful applications. Among these, ultrathin metal oxide films have attracted attention for their application in reaction catalysis, yet mechanisms underlying this catalytic role have remained unclear.
Using a scanning tunneling microscope (STM) at ultra-low temperatures, the research team explored the dynamics of single water molecules interacting with a film of magnesium oxide (MgO) several atoms in thickness (Figure 1). They discovered that by injecting tunnelling electrons into water molecules on the MgO surface (Figure 2), they could select between dissociation pathways: excitation of the molecule’s vibrational states induced dissociation into hydroxyl (H + OH) (Figure 3 (a) and (b)), whereas excitation of its electronic states induced dissociation into atomic oxygen (O) (Figure 3 (c) and (d)) - see attached file.
The controlled dissociation of water molecules via selected reaction pathways presents unique opportunities in targeted catalysis, particularly in the production of hydrogen, a potential source of clean energy. While advancing our understanding of the dynamics of water molecules, the discovery also sets the stage for applications in the catalysis of more complex systems on insulating films.
For more information, please contact:Dr. Yousoo Kim
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The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
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The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
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