Combined in Situ X-ray absorption and diffuse reflectance infraredspectroscopy: An attractive tool for catalytic investigations

Journal Article · Wed Nov 24 04:00:00 EST 2010 · Nuclear Instruments and Methods in Physics Research A

DOI:https://doi.org/10.1016/j.nima.2010.11.079· OSTI ID:1019476

Marinkovic, N S; Ehrlich, S; Wang, Q; Barrio, L; Khalid, S

Catalysis investigations are often followed in a range of spectroscopic techniques. While diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) can be done on a bench-top instrument, X-ray absorption spectroscopy (XAS) techniques, such as extended X-ray absorption fine structure (EXAFS) and X-ray absorption near-edge structure (XANES) require synchrotron light. In order to ensure the same conditions during in situ catalysis for each method, a combined XAS/DRIFTS has been developed at beamline X18A at the National Synchrotron Light Source, Brookhaven National Laboratory. A rapid-scan FTIR spectrometer capable of both mid- and far-infrared measurements is equipped with an arm to redirect the IR beam outside the spectrometer. An in situ reaction chamber, equipped with glassy carbon windows for X-ray light and a KBr window for IR light passage is installed firmly on the arm. The reaction cell can be heated to 600 C and allows passage of gases through the catalyst so that both XAS and DRIFTS techniques can be done simultaneously in controlled environment conditions. Together with a fast-moving monochromator for quick-EXAFS and mass-spectrometric residual gas analysis, this new tool is a powerful method for testing catalytic reactions in real time.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: DOE - OFFICE OF SCIENCE
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1019476
• Report Number(s): BNL--94975-2011-JA; KC0401030
• Journal Information: Nuclear Instruments and Methods in Physics Research A, Journal Name: Nuclear Instruments and Methods in Physics Research A; ISSN 0168-9002
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ABSORPTION SPECTROSCOPY
BNL
CARBON
CATALYSIS
CATALYSTS
FINE STRUCTURE
GAS ANALYSIS
GASES
MONOCHROMATORS
NSLS
SPECTROMETERS
SPECTROSCOPY
SYNCHROTRONS
TESTING
WINDOWS
national synchrotron light source