Determining the coordination environment and electronic structure of polymer-encapsulated cobalt phthalocyanine under electrocatalytic CO2 reduction conditions using in situ X-Ray absorption spectroscopy

2020 ◽  
Vol 49 (45) ◽  
pp. 16329-16339
Author(s):  
Yingshuo Liu ◽  
Aniruddha Deb ◽  
Kwan Yee Leung ◽  
Weixuan Nie ◽  
William S. Dean ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Absorption Spectroscopy ◽  
Co2 Reduction ◽  
Cobalt Phthalocyanine ◽  
Coordination Environment ◽  
X Ray ◽  
Axial Ligation ◽  
Absorbance Spectroscopy ◽  
X Ray Absorption

In situ X-ray absorbance spectroscopy measurements show that encapsulating cobalt phthalocyanine within coordinating polymers leads to axial ligation of Co and results in enhanced rates for electrocatalytic CO2 reduction.

scholarly journals In situ X-ray emission and high-resolution X-ray absorption spectroscopy applied to Ni-based bimetallic dry methane reforming catalysts

Nanoscale ◽  
2020 ◽  
Vol 12 (28) ◽  
pp. 15185-15192
Author(s):  
Abbas Beheshti Askari ◽  
Mustafa al Samarai ◽  
Nozomu Hiraoka ◽  
Hirofumi Ishii ◽  
Lukas Tillmann ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Catalytic Activity ◽  
High Resolution ◽  
Absorption Spectroscopy ◽  
Methane Reforming ◽  
X Ray ◽  
Reforming Catalyst ◽  
Reforming Catalysts ◽  
X Ray Absorption

The effect of cobalt on the catalytic activity of a NiCoO dry methane reforming catalyst was investigated by in situ XES and HERFD XAS. Co is shown to hamper the reduction of the Ni in the NiCoO catalyst by modulation of its electronic structure.

In situ X-ray absorption spectroscopy of transition metal based water oxidation catalysts

2017 ◽  
Vol 46 (1) ◽  
pp. 102-125 ◽  
Author(s):  
Christina H. M. van Oversteeg ◽  
Hoang Q. Doan ◽  
Frank M. F. de Groot ◽  
Tanja Cuk
Keyword(s):  
Electronic Structure ◽  
Transition Metal ◽  
Absorption Spectroscopy ◽  
Water Oxidation ◽  
Oxidation Catalysts ◽  
X Ray ◽  
Absorption Studies ◽  
X Ray Absorption

X-ray absorption studies of the geometric and electronic structure of primarily heterogeneous Co, Ni, and Mn based water oxidation catalysts are reviewed.

Shedding Light on the Electronic Structure and Local Configuration of Fe/N/C Active Sites – an in Situ X-Ray Absorption Spectroscopy Study

2020 ◽  
Vol MA2020-02 (62) ◽  
pp. 3156-3156
Author(s):  
Kathrin Ebner ◽  
Viktoriia A. Saveleva ◽  
Adam H. Clark ◽  
Grigory Smolentsev ◽  
Jingfeng Chen ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Absorption Spectroscopy ◽  
Active Sites ◽  
Spectroscopy Study ◽  
X Ray ◽  
Local Configuration ◽  
X Ray Absorption

scholarly journals An X-ray absorption spectroscopy investigation of the coordination environment of electrogenerated Ni(ii)-pseudohalide complexes arising from the anodic polarization of Ni electrodes in DMSO solutions of NCO−, NCS− and NCSe− ions

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15709-15718 ◽  
Author(s):  
Kethsiri H. K. L. Alwis ◽  
Bridget Ingham ◽  
Michael R. Mucalo ◽  
Peter Kappen ◽  
Chris Glover
Keyword(s):  
Absorption Spectroscopy ◽  
Coordination Sphere ◽  
Anodic Polarization ◽  
Metal Electrode ◽  
Coordination Environment ◽  
X Ray ◽  
X Ray Absorption ◽  
Electrode Systems

EXAFS/XANES measurements combined with IR spectroelectrochemistry directly probe in situ the coordination sphere of electrogenerated ions in metal electrode systems so obviating the need to isolate ions unchanged from the electrolyte for analysis.

Application of In Situ X-ray Absorption Spectroscopy to Study Dilute Chromium Ions in a Molten Chloride Salt

2019 ◽  
Author(s):  
Jisue Moon ◽  
Carter Abney ◽  
Dmitriy Dolzhnikov ◽  
James M. Kurley ◽  
Kevin A. Beyer ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Local Structure ◽  
Chloride Salt ◽  
X Ray ◽  
Molten Chloride ◽  
Stable Species ◽  
Higher Temperature ◽  
Cr Concentration ◽  
X Ray Absorption

The local structure of dilute CrCl<sub>3</sub> in a molten MgCl<sub>2</sub>:KCl salt was investigated by <i>in situ</i> x-ray absorption spectroscopy (XAS) at temperatures from room temperature to 800<sup>o</sup>C. This constitutes the first experiment where dilute Cr speciation is explored in a molten chloride salt, ostensibly due to the compounding challenges arising from a low Cr concentration in a matrix of heavy absorbers at extreme temperatures. CrCl<sub>3</sub> was confirmed to be the stable species between 200 and 500<sup>o</sup>C, while mobility of metal ions at higher temperature (>700<sup>o</sup>C) prevented confirmation of the local structure.

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