A unified approach to the analysis of the chemical bond in hydrides and hydrocarbons

Yoshifumi Shinzato, Hiroshi Yukawa, Masahiko Morinaga, Takeshi Baba, Hiromi Nakai

研究成果: Article査読

11 被引用数 (Scopus)

抄録

Total energy calculation is common in the field of materials science. However, in view of design for hydrogen storage materials, information is still limited about the role of each constituent element in them. In this paper, a unified approach based on the atomization energy concept is proposed for understanding the chemical bond in hydrides without using the standard concept of covalent and ionic bonds. The atomization energies, ΔEH for the hydrogen atom and ΔEM for the metal atom in each hydride, are evaluated using the energy density analysis of the total energy, and an ΔEH vs. ΔEM diagram is constructed. All the hydrides, including complex hydrides and metal hydrides, can be located on this diagram, although there are significant differences in the nature of the chemical bond among them. Also, for hydrocarbons, CmHn, the atomization energy for carbon, ΔEC, increases linearly with the ratio of carbon number to hydrogen number, m/n, while keeping ΔEH constant.

本文言語English
ページ(範囲)6673-6680
ページ数8
ジャーナルActa Materialia
55
20
DOI
出版ステータスPublished - 2007 12

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • ポリマーおよびプラスチック
  • 金属および合金

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