The Linkam temperature controlled stage CCR1000 is used as a mini-reactor (in-situ Raman cell) at the University of South Carolina to study heterogeneous catalysis
Tadworth, UK – 27th March 2012: Market leaders in temperature controlled microscopy, Linkam Scientific Instruments report on the use of their CCR1000 as a mini reactor (in-situ Raman cell) at the University of South Carolina.
Researchers at the University of South Carolina are using the Linkam CCR1000 stage as a mini-reactor (in-situ Raman cell). They are using Raman spectroscopy to investigate the oxidation of carbon monoxide over rhodium based catalysts (zeolite and alumina are used as supports).
Specifically, they are looking at the structure and morphology of the active sites of rhodium containing catalysts under working conditions. They apply variable techniques to determine the metal electronic state and its coordination environment (in case of supported rhodium complexes) during the catalytic cycle. Raman spectroscopy is used to understand the activity of rhodium oxide species. Catalysis by “single site” catalysts is of particular interest to the researchers.
The catalysts are prepared in a nitrogen atmosphere and generally should be considered as air and water sensitive materials. Therefore, the team have to load the samples in the reactor/cell (CCR1000) in a glove box filled with nitrogen. Two valves have been installed on the CCR1000 so they are able to transfer the cell to the Raman spectrometer to avoid contact with air. At the spectrometer, they connect it to the gas distribution system allowing the CO/O2/He mixture to flow right through the reactor/cell. The main objective of the experiment is to follow formation and possibly decomposition of rhodium oxide species on a surface of supports during carbon monoxide oxidation at different temperatures.
They explain ‘the motivation for our research is basically gaining fundamental knowledge on the catalysis by “non-metallic” species. In other words, we are looking at the catalysis by supported metal clusters (4-10 atoms) or supported metal complexes (1 atom). At this scale catalyst properties change drastically which often results in enhanced catalytic activity.’
When asked about the Linkam system they also noted the ‘big advantage is a precise temperature control which is important when doing multiple experiments at different temperatures.’
Visit Linkam at www.linkam.co.uk and learn about the broad range of applications in the field of temperature controlled microscopy.
About Linkam Scientific Instruments
Linkam develops and manufactures a broad range of heating and freezing stages for both OEM and end users to visualize and explore materials properties. Used in conjunction with light microscopes and other forms of spectroscopy, Linkam stages are found in thousands of laboratories worldwide with the most successful microscope heating stage, the THMS600, selling over 4,000 units alone. Linkam is the market leader in temperature controlled microscopy.
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