Open AccessX‐ray spectroscopy for chemical and energy sciences: the case of heterogeneous catalysis
Author(s) -
Frenkel Anatoly I.,
van Bokhoven Jeroen A.
Publication year - 2014
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577514014854
Subject(s) - xanes , extended x ray absorption fine structure , x ray absorption spectroscopy , spectroscopy , catalysis , heterogeneous catalysis , nanotechnology , absorption spectroscopy , materials science , x ray absorption fine structure , absorption (acoustics) , chemistry , physics , optics , organic chemistry , composite material , quantum mechanics
Heterogeneous catalysis is the enabling technology for much of the current and future processes relevant for energy conversion and chemicals synthesis. The development of new materials and processes is greatly helped by the understanding of the catalytic process at the molecular level on the macro/micro‐kinetic time scale and on that of the actual bond breaking and bond making. The performance of heterogeneous catalysts is inherently the average over the ensemble of active sites. Much development aims at unravelling the structure of the active site; however, in general, these methods yield the ensemble‐average structure. A benefit of X‐ray‐based methods is the large penetration depth of the X‐rays, enabling in situ and operando measurements. The potential of X‐ray absorption and emission spectroscopy methods (XANES, EXAFS, HERFD, RIXS and HEROS) to directly measure the structure of the catalytically active site at the single nanoparticle level using nanometer beams at diffraction‐limited storage ring sources is highlighted. The use of pump–probe schemes coupled with single‐shot experiments will extend the time range from the micro/macro‐kinetic time domain to the time scale of bond breaking and making.