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Transition-metal dioxides

Table 6.4. Properties of transition-metal dioxides with rutile-type structure ... Table 6.4. Properties of transition-metal dioxides with rutile-type structure ...
Several high-temperature procedures have been described in the literature for the preparation of the transition-metal dioxides. Direct oxidation of the metals, lower oxides, chlorides, or nitrate precursors provides a convenient route to the dioxides of several metals Ti, Mn, Ru, Rh, Os, Ir, and Pt.1,3-5 (Syntheses of the rutile forms of rhodium and platinum dioxides by direct oxidation requires application of high pressures.5) Reduction of higher oxides is the most common method of synthesis for these dioxides V02, Nb02, Mo02, W02, and /3-Re02.4,6-8 Stoichiometry in these reactions is most readily controlled by use of the respective metal or a lower oxide as reductant. Chromium dioxide is normally synthesized by hydrothermal reduction of the trioxide.9... [Pg.136]

Hewett et al. (9) have reviewed the spectroscopic studies on Mo02(g). In addition they have studied spectroscopically M0O2 in neon and argon matrices at 4 K. The adopted bond distance and angle and two stretching frequencies are derived from this study. Brewer ( ) adopted the same values. The bending frequency (300 cm ) is estimated by comparison with other transition metal dioxides. [Pg.1517]

Gong Y, Zhou M (2009) Infrared spectra of transition-metal dioxide anions MO - (M = Rh, Ir, Pt, Au) in solid argon. J Phys Chem Al 13 4990-4995... [Pg.218]

V. Bolis, C. Morterra, B. Fubini, R UgUengo, E. Garrone, Temkin-type model for the description of induced heterogeneity—CO adsorption on group-4 transition-metal dioxides. Langmuir 9(6), 1521-1528 (1993). doi 10.1021/la00030a017... [Pg.520]

Several high-temperature procedures have been described in the literature for the preparation of the transition-metal dioxides. Direct oxidation of the metals, lower oxides, chlorides, or nitrate precursors provides a convenient route to the dioxides of several metals Ti, Mn, Ru, Rh, Os, Ir, and Pt. (Syntheses of the... [Pg.97]

See other pages where Transition-metal dioxides is mentioned: [Pg.16]    [Pg.320]    [Pg.48]    [Pg.135]    [Pg.136]    [Pg.137]    [Pg.139]    [Pg.141]    [Pg.143]    [Pg.145]    [Pg.452]    [Pg.3411]    [Pg.171]    [Pg.279]    [Pg.202]    [Pg.240]    [Pg.3410]    [Pg.49]    [Pg.49]    [Pg.168]    [Pg.96]    [Pg.97]    [Pg.97]    [Pg.99]    [Pg.103]   
See also in sourсe #XX -- [ Pg.13 , Pg.135 , Pg.136 , Pg.137 , Pg.138 , Pg.139 , Pg.140 , Pg.141 , Pg.142 , Pg.143 , Pg.144 ]

See also in sourсe #XX -- [ Pg.13 , Pg.135 , Pg.136 , Pg.137 , Pg.138 , Pg.139 , Pg.140 , Pg.141 , Pg.142 , Pg.143 , Pg.144 ]

See also in sourсe #XX -- [ Pg.13 , Pg.135 , Pg.136 , Pg.137 , Pg.138 , Pg.139 , Pg.140 , Pg.141 , Pg.142 , Pg.143 , Pg.144 ]



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