In situ studies of methanol decomposition and oxidation on Pd(111) by PM-IRAS and XPS spectroscopy

Article Abstract:

Methanol decomposition and oxidation on Pd(111) at millibar pressure were studied in situ polarization-modulation infrared reflection spectroscopy (PM-IRAS), on-line gas chromatography and pre- and postreaction X-ray photoelectron spectroscopy (XPS). It is shown that carbonaceous overlayers that are present during the reaction may act as poison and increase the selectivity toward the partial oxidation product formaldehyde by blocking sites required for methanol dehydrogenation.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Palladium, Formaldehyde, Methanol, Electric properties, Photoelectron spectroscopy

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Metal atoms and particles on oxide supports: probing structure and charge by infrared spectroscopy

Article Abstract:

The study shows that vibrational spectroscopy may be a valuable tool to study ultrasmall metal particles and single metal atoms. It is concluded that infrared spectroscopy might contribute to the elucidation of structure and charge of ultrasmall supported metal aggregates with sizes down to a single atom.

Infrared spectroscopy, Metallic oxides, Metal oxides, Vibrational spectra

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Exchange rates of surfactant at the solid-liquid interface obtained by ATR-FTIR

Article Abstract:

ATR--IR is a valid technique for measuring the amount of adsorption to a solid-liquid interface, and this idea is further supported by the agreement between adsorption isotherms measured by ellipsometry and by ATR--IR. The rate of desorption is rapid, but is slow to discern a break in the desorption rate.

Surface active agents, Surface Active Agent Manufacturing, Usage, Observations, Chemistry, Physical and theoretical, Physical chemistry, Adsorption

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