The growth of metals on TiO2(1 1 0) at one monolayer coverage is classified into three-dimensional island, two-dimensional layer, and transition growth zones via two thermodynamic parameters, the heat of formation of metal oxides, −ΔfH0oxideofM, and the heat of sublimation of metals, −ΔfH0metal,permolofmetal (both expressed per mol of metal), which are easily obtainable. These two parameters represent the strength of metal/TiO2(1 1 0) interfacial interactions and the strength of metal/metal lateral interactions, respectively. Such classification is based on the thermodynamic criteria that the growth mode of metals on TiO2(1 1 0) is determined by metal/TiO2 interfacial free energy and metal surface free energy. Compared with the conventional approach that only uses the heat of formation of metal oxides, −ΔfH0oxideofO (expressed per mol of oxygen), our model provides a clearer and more comprehensive vision of the growth mode of metals on TiO2(1 1 0) and the factors affecting the growth mode. The approach described in this study can also be applied to other metal/reducible oxide systems.
雑誌名
Surface science
巻
513
号
3
ページ
530 - 538
発行年
2002-08-01
ISSN
00396028
書誌レコードID
AA00853803
フォーマット
application/pdf
日本十進分類法
431.86
出版者
Elsevier
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A new insight into the growth mode of metals on TiO2(110)
2002SS_hu.pdf
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