Hokkaido University · Engineering
Professor Hisayoshi Matsushima's research lab specializes in electrochemistry and surface science, with a focus on understanding and manipulating electrode surface structures at the atomic level during electrochemical processes. The lab investigates surface reconstructions, electrodeposition mechanisms, and the influence of external fields—particularly magnetic fields—on mass transport and crystal growth in electrochemical systems. Their work spans fundamental studies of metal deposition (e.g., Cu, Bi, Al) on single-crystal electrodes to applied research in energy conversion technologies such as fuel cells and batteries.
Figures are computed from collected data and may differ slightly.
Electrochemical hydrogen evolution on (100)-oriented copper electrodes is shown to induce a novel surface reconstruction, which substantially influences the rates of this electrochemical reaction. As revealed by in situ video-STM the formation of this phase starts with lateral displacements of Cu surface atoms from lattice positions, resulting in stripe-like structures, followed by expansion of the surface lattice along the stripe direction.
The surface structure of Cu(100) electrodes in perchloric acid solutions of pH 1 to 3 was studied in the potential range of hydrogen evolution by video-rate scanning tunneling microscopy, focusing on the recently reported hydrogen-induced surface reconstruction [H. Matsushima et al., J. Am. Chem. Soc. 2009, 131, 10362]. Potential-dependent measurements reveal a two step formation process: at potentials close to the onset of hydrogen evolution a p(1×8) phase emerges, where Cu surface atoms in str
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