scholarly journals High Energy Resolution-X-ray Absorption Near Edge Structure Spectroscopy Reveals Zn Ligation in Whole Cell Bacteria

2019 ◽  
Vol 10 (10) ◽  
pp. 2585-2592 ◽  
Author(s):  
Sara A. Thomas ◽  
Bhoopesh Mishra ◽  
Satish C. B. Myneni
Keyword(s):  
Energy Resolution ◽  
High Energy ◽  
High Energy Resolution ◽  
Edge Structure ◽  
Whole Cell ◽  
X Ray ◽  
X Ray Absorption

scholarly journals High-energy resolution X-ray absorption and emission spectroscopy reveals insight into unique selectivity of La-based nanoparticles for CO2

2015 ◽  
Vol 112 (52) ◽  
pp. 15803-15808 ◽  
Author(s):  
Ofer Hirsch ◽  
Kristina O. Kvashnina ◽  
Li Luo ◽  
Martin J. Süess ◽  
Pieter Glatzel ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Emission Spectroscopy ◽  
High Energy ◽  
Unit Cell ◽  
High Energy Resolution ◽  
Electron Configuration ◽  
Edge Structure ◽  
X Ray ◽  
X Ray Absorption

The lanthanum-based materials, due to their layered structure and f-electron configuration, are relevant for electrochemical application. Particularly, La2O2CO3 shows a prominent chemoresistive response to CO2. However, surprisingly less is known about its atomic and electronic structure and electrochemically significant sites and therefore, its structure–functions relationships have yet to be established. Here we determine the position of the different constituents within the unit cell of monoclinic La2O2CO3 and use this information to interpret in situ high-energy resolution fluorescence-detected (HERFD) X-ray absorption near-edge structure (XANES) and valence-to-core X-ray emission spectroscopy (vtc XES). Compared with La(OH)3 or previously known hexagonal La2O2CO3 structures, La in the monoclinic unit cell has a much lower number of neighboring oxygen atoms, which is manifested in the whiteline broadening in XANES spectra. Such a superior sensitivity to subtle changes is given by HERFD method, which is essential for in situ studying of the interaction with CO2. Here, we study La2O2CO3-based sensors in real operando conditions at 250 °C in the presence of oxygen and water vapors. We identify that the distribution of unoccupied La d-states and occupied O p- and La d-states changes during CO2 chemoresistive sensing of La2O2CO3. The correlation between these spectroscopic findings with electrical resistance measurements leads to a more comprehensive understanding of the selective adsorption at La site and may enable the design of new materials for CO2 electrochemical applications.

scholarly journals High-resolution X-ray absorption spectroscopy of iron carbonyl complexes

2015 ◽  
Vol 17 (21) ◽  
pp. 13937-13948 ◽  
Author(s):  
Andrew J. Atkins ◽  
Matthias Bauer ◽  
Christoph R. Jacob
Keyword(s):  
High Resolution ◽  
Absorption Spectroscopy ◽  
Energy Resolution ◽  
High Energy ◽  
Iron Carbonyl ◽  
High Energy Resolution ◽  
Carbonyl Complexes ◽  
Edge Structure ◽  
X Ray ◽  
X Ray Absorption

We apply high-energy-resolution fluorescence-detected (HERFD) X-ray absorption near-edge structure (XANES) spectroscopy to study iron carbonyl complexes.

scholarly journals High-Energy-Resolution Fluorescence-Detected X-ray Absorption of the Q Intermediate of Soluble Methane Monooxygenase

2017 ◽  
Vol 139 (49) ◽  
pp. 18024-18033 ◽  
Author(s):  
Rebeca G. Castillo ◽  
Rahul Banerjee ◽  
Caleb J. Allpress ◽  
Gregory T. Rohde ◽  
Eckhard Bill ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Methane Monooxygenase ◽  
High Energy ◽  
High Energy Resolution ◽  
X Ray ◽  
Soluble Methane Monooxygenase ◽  
X Ray Absorption

scholarly journals Wetting Induced Oxidation of Pt-based Nano Catalysts Revealed by In Situ High Energy Resolution X-ray Absorption Spectroscopy

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Yi-Tao Cui ◽  
Yoshihisa Harada ◽  
Hideharu Niwa ◽  
Tatsuya Hatanaka ◽  
Naoki Nakamura ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Energy Resolution ◽  
High Energy ◽  
High Energy Resolution ◽  
X Ray ◽  
Nano Catalysts ◽  
X Ray Absorption

Time-resolved XAFS measurement using quick-scanning techniques at BSRF

2017 ◽  
Vol 24 (3) ◽  
pp. 674-678 ◽  
Author(s):  
Shengqi Chu ◽  
Lirong Zheng ◽  
Pengfei An ◽  
Hui Gong ◽  
Tiandou Hu ◽  
...  
Keyword(s):  
Signal To Noise Ratio ◽  
High Energy ◽  
High Energy Resolution ◽  
Double Crystal ◽  
Time Resolved ◽  
Edge Structure ◽  
X Ray ◽  
Double Crystal Monochromator ◽  
Good Signal ◽  
X Ray Absorption

A new quick-scanning X-ray absorption fine-structure (QXAFS) system has been established on beamline 1W1B at the Beijing Synchrotron Radiation Facility. As an independent device, the QXAFS system can be employed by other beamlines equipped with a double-crystal monochromator to carry out quick energy scans and data acquisition. Both continuous-scan and trapezoidal-scan modes are available in this system to satisfy the time scale from subsecond (in the X-ray absorption near-edge structure region) to 1 min. Here, the trapezoidal-scan method is presented as being complementary to the continuous-scan method, in order to maintain high energy resolution and good signal-to-noise ratio. The system is demonstrated to be very reliable and has been combined with in situ cells to carry out time-resolved XAFS studies.

scholarly journals High Energy Resolution Off-Resonant Spectroscopy for X-Ray Absorption Spectra Free of Self-Absorption Effects

2014 ◽  
Vol 112 (17) ◽  
Author(s):  
W. Błachucki ◽  
J. Szlachetko ◽  
J. Hoszowska ◽  
J.-Cl. Dousse ◽  
Y. Kayser ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Energy Resolution ◽  
High Energy ◽  
High Energy Resolution ◽  
X Ray ◽  
X Ray Absorption

scholarly journals Differential uranyl(v) oxo-group bonding between the uranium and metal cations from groups 1, 2, 4, and 12; a high energy resolution X-ray absorption, computational, and synthetic study

2019 ◽  
Vol 10 (42) ◽  
pp. 9740-9751 ◽  
Author(s):  
Markus Zegke ◽  
Xiaobin Zhang ◽  
Ivan Pidchenko ◽  
Johann A. Hlina ◽  
Rianne M. Lord ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Metal Cations ◽  
High Energy ◽  
High Energy Resolution ◽  
X Ray ◽  
X Ray Absorption

Uranyl Pacman takes them all: the bonding of s- and d-block cations to uranyl is compared by experiment, spectroscopy and theory.

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