Combined in situ X-ray absorption and diffuse reflectance infrared spectroscopy: An attractive tool for catalytic investigations

Journal Article · · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2010.11.079· OSTI ID:1065634

Marinkovic, N. S. ^[1]; Wang, Q. ^[1]; Barrio, L. ^[2]; Ehrlich, S. N. ^[3]; Khalid, S. ^[3]; Cooper, C. ^[4]; Frenkel, A. I. ^[4]

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1. Synchrotron Catalysis Consortium, Univ. of Delaware, Newark, DE (United States)
2. Brookhaven National Lab. (BNL), Upton, NY (United States)
3. National Synchrotron Light Source, Brookhaven National Lab. (BNL), Upton, NY (United States)
4. Yeshiva Univ., New York, NY (United States)

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: Energy Frontier Research Centers (EFRC); Catalysis Center for Energy Innovation (CCEI)
• Sponsoring Organization: USDOE SC Office of Basic Energy Sciences (SC-22)
• DOE Contract Number: SC0001004
• OSTI ID: 1065634
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Issue: 1 Vol. 649(1); ISSN 0168-9002
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

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