Über die Oxidcarbide von Chrom, Molybdän, Wolfram und Vanadin

Lux, Hermann; Ignatowicz, A.

doi:10.1002/cber.19681010309

Cited by 20 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pattern for the unsupported Mo 2 C reported here is in close agreement to that published by Liang and co‐workers . They referenced their material to PDF# 35‐0787: a hexagonal phase with space group P 6 3 / mmc . There is a body of literature, however, that suggests that the orthorhombic phase (space group Pbcn ) is very slightly more stable than the hexagonal phase at room temperature .…”

Section: Resultssupporting

confidence: 89%

Renewable Aromatics from Kraft Lignin with Molybdenum‐Based Catalysts

et al. 2017

View full text Add to dashboard Cite

The catalytic depolymerization of Kraft lignin in supercritical ethanol was explored in the presence of Mo2C- and MoS2-based catalysts. At 280 °C, Mo2C and Mo2C/Al2O3 afforded aromatic yields of 425 and 419 mg/g lignin, respectively: amongst the highest yields reported to date. Ionic-liquid-assisted delamination of MoS2 resulted in highly active catalysts, capable of quantitative conversion of lignin at the expense of aromatic yield (ca 186 mg/g lignin). Across all the catalysts studied, between 0.04 wt% and 0.38 wt% of molybdenum leached into solution under supercritical conditions, according to ICP analyses (corresponding to 27–570 µg of molybdenum in the reaction supernatant). A small contribution to the molybdenum in solution comes from the reactor itself (Hastelloy C contains 16 wt% Mo). Analysis of a depolymerization performed with fresh Kraft lignin and the soluble portion of the reaction mixture from a previous reactor run indicated that the leached species were neither active enough to afford the high conversions observed, nor selective enough to give high yields of aromatic products. In conjunction with the ICP data and differential chemoselectivities of the Mo2C- and MoS2-based catalysts, these results suggest that the bulk of the catalysis is heterogeneous

show abstract

Section: Resultssupporting

confidence: 89%

Renewable Aromatics from Kraft Lignin with Molybdenum‐Based Catalysts

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Such chromium compounds as chromium nitride, chromium carbide, and chromium oxide are well known as being hard and highly corrosion resistant materials; coating material surfaces with chromium compounds is one of the most important methods for improving their wear and corrosion resistance (1)(2)(3)(4). Chromium oxycarbide as a possible chromium compound was reported by Lux and Ignatowiez (5) in 1968. They produced the compound by thermal decomposition of hexacarbonylchromium under vacuum.…”

mentioning

confidence: 87%

Characteristics of Chromium Oxycarbide Thin Film Prepared by Plasma‐Assisted CVD Method

Kado

Noda

1989

J. Electrochem. Soc.

View full text Add to dashboard Cite

Thin films containing chromium compound were prepared onto SUS 304 stainless steel and slide glass substrates by plasma decomposition of hexacarbonylchromium with hydrogen carrier gas. The chemical composition of the films was identified as chromium oxycarbide false(Cr2COfalse) by XPS measurements, and the structure of Cr2CO was revealed as a face‐centered cubic structure by x‐ray diffraction experiments. Vickers hardness and the anodic polarization current density of the films were measured in order to investigate the properties of corrosion resistance. As a result, the Cr2CO film was found to have one of the best characteristics for coating the material to resist surface corrosion.

show abstract