CUjO type

Steady-state potential comparable with Types 4 and 5 reversible electrodes Potential of metal depends on pH of solution, although the dependence is confined to a limited range of pH and does not conform precisely to the Nernst equation. Ni in H2SO4 (Ni/Hj, H + ) Cu in NaOH (Cu/CujO/OH")... 

The studies on Cu2 aO mentioned above concluded that CujO is a metal-deficient p-type semiconductor with cation vacancies. It was not established, however, which kinds of defects (Vcu, Vcu) were dominant and what the effect of Q (interstitial oxygen) was on non-stoichiometry. To clarify these points, Peterson and Wiley measured the diffusion coefficient, D, of Cu in Cu2 O, by use of "Cu as a tracer over the temperature range 700-1153 °C and for oxygen partial pressures, greater than 10 atm. It has been widely accepted that lattice defects play an important role in the diffusion of atoms or ions. Accordingly it can be expected that the measurement of D gives important information on the lattice defects. 

Which types of semiconductor are represented by the following oxides VO2 CujO WO3 MnOj Nb205 CoO... 

Son, S. U., Park, I. K., Park, J., and Hyeon, T. 2004. Synthesis of CujO coated Cu nanoparticles and their successful applications to Ulhnann-type amination coupling reactions of aryl chlorides. Chem. Commun. (7) 778-779. 

FIGURE 4.40 The unit cell of perovskite type (1 2 3) YBa CUjO, superconductor. 

Except for binary oxides, chemisorption-type conductometric sensors employ complex oxides such as Cdlnp, NiTa Og, CoTa O, CuTOjO, BaSnOj, LnFeOj, CdFe O, Bi Sn O, YBa CUjO, Bi Mo O, ... 

We have already mentioned that the photoelectrochemical properties of oxide layers depend strongly on the conditions under which they are formed. When CU2O develops in systems containing Cu(II) complexes, the main factors responsible of the type of conductivity are the nature of hgand and the pH of solution. Single crystals or polycrystalline compact forms of CujO are known to be /)-type semiconductors with a band gap of 2.1 eV. However, common / -type... 

McShane, C. M. and K.-S. Choi. 2009. Photocurrent enhancement of n-type CujO electrodes achieved by controlling dendritic branching growth. J. Am. Chem. Soc. 131 2561-2569. 

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