Y
Yasuyuki Ishikawa
Researcher at University of Puerto Rico
Publications - 236
Citations - 7553
Yasuyuki Ishikawa is an academic researcher from University of Puerto Rico. The author has contributed to research in topics: Fock space & Ion. The author has an hindex of 46, co-authored 236 publications receiving 7172 citations. Previous affiliations of Yasuyuki Ishikawa include University of Puerto Rico, Río Piedras & University of Puerto Rico at Mayagüez.
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Relativistic Gaussian basis set calculations on one-electron ions with a nucleus of finite extent
TL;DR: In this article, the effect of replacing the point model of the atomic nucleus by a nucleus of finite size was explored in relativistic Dirac-Fock calculations on O 7+ and Hg 79+ and it was shown that smaller basis expansions are required for the heavier nucleus in the finite-nucleus model.
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Validity of first-order perturbation theory for relativistic energy corrections
TL;DR: First-order relativistic calculations give a relative error in the estimate of the total correction which increases like Z 2 from 0.26% for neon to 8% for xenon as discussed by the authors.
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Activity, Selectivity, and Anion-Exchange Membrane Fuel Cell Performance of Virtually Metal-Free Nitrogen-Doped Carbon Nanotube Electrodes for Oxygen Reduction Reaction
TL;DR: In this article, the surface nitrogen concentration of nitrogen-doped carbon nanotubes (N-CNTs) is estimated to be ∼8.0 at.% in an ion exchange membrane fuel cell.
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Preparation and methanol oxidation catalysis of Pt-CeO2 electrode
TL;DR: In this article, an electrochemical methodology to prepare platinum/cerium oxide electrodes by using glassy carbon substrates has been developed, which involves an "occlusion deposition" of CeO 2 particles at glassed carbon electrodes from a platinum bath in acid solution at an applied constant potential.
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Transition energies of mercury and ekamercury (element 112) by the relativistic coupled-cluster method
TL;DR: The relativistic coupled-cluster method is used to calculate ionization potentials and excitation energies of Hg and element 112, as well as their mono- and dications, and no bound states were found for the anions of the two atoms.