Zur Poetik Paul Celans: Gedicht und Mensch - Die Arbeit am Sinn

This publication summarises my PhD on Paul Celans poetics, focussing on the constitution of meaning and establishing it as a poetological anthropology.

Zur Korrespondenz Ingeborg Bachmann / Paul Celan - 'exemplarisch'? Der lebensschriftliche Anspruch der Dichtung

This article analyses the correspondence and relationship between Bachmann and Celan and elaborates the claims to literature of the poetics of these major postwar poets.

Electrochemical synthesis of Mo2C catalytical coatings for the water-gas shift reaction

The electroreduction of CO32- ions on a molybdenum cathode in a NaCl-KCl-Li2CO3 melt was studied by cyclic voltarnmetry. The electrochemical synthesis of Mo2C on molybdenum substrates has been performed at It 23 K for 7 h with a cathodic current density of 5 mA cm(-2). If molybdenum carbide is present as a thin (ca. 500 nm) film on a molybdenum substrate (Mo2C/Mo), its catalytic activity in the water gas-shift reaction is enhanced by at least an order of magnitude compared to that of the bulk Mo2C phase.

The kinetics of semiconductor photocatalysis: Light intensity effects

The kinetics of the photomineralisation of 4-chlorophenol, 4-CP, by oxygen, sensitized by TiO2 as a function of incident light intensity are described. Degussa P25 TiO2 in the form of either a thin film or a dispersion is used as the photocatalyst. With a TiO2 dispersion the initial rate of photomineralisation, R-i, depends upon I-0.64, implying that electron-hole recombination is the dominant process with respect to photogenerated holes (where R-i is expected proportional to I-0.5), but that the light intensities used spanned both the high (R-i expected proportional to I-0.5) and low (R-i expected proportional to I) intensity regimes. With a TiO2 film R-i is proportional to I indicating that the photocatalytically active particles of the TiO2 film are shielded in some way and so operate under low intensity conditions. Most significantly, it was also found that the apparent value of the Langmuir adsorption coefficient, K4-CP, as determined from the kinetic data, was not independent of I for either a TiO2, film or dispersion photocatalyst. Rather K4-CP increased with decreasing light intensity. A possible mechanism is suggested as a rationale for the observed light intensity effects reported.