Interrogating the photogenerated Ir(iv) state of a water oxidation catalyst using ultrafast optical and X-ray absorption spectroscopy

2013 ◽  
Vol 4 (10) ◽  
pp. 3863 ◽  
Author(s):  
Michael T. Vagnini ◽  
Michael W. Mara ◽  
Michael R. Harpham ◽  
Jier Huang ◽  
Megan L. Shelby ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Water Oxidation ◽  
Oxidation Catalyst ◽  
X Ray ◽  
Ultrafast Optical ◽  
X Ray Absorption

The Key RuV=O Intermediate of Site-Isolated Mononuclear Water Oxidation Catalyst Detected by in Situ X-ray Absorption Spectroscopy

2017 ◽  
Vol 140 (1) ◽  
pp. 451-458 ◽  
Author(s):  
Dmitry Lebedev ◽  
Yuliana Pineda-Galvan ◽  
Yuki Tokimaru ◽  
Alexey Fedorov ◽  
Nicolas Kaeffer ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Water Oxidation ◽  
Oxidation Catalyst ◽  
X Ray ◽  
X Ray Absorption

Direct Observation of Active Nickel Oxide Cluster in Nickel–Borate Electrocatalyst for Water Oxidation by In Situ O K-Edge X-ray Absorption Spectroscopy

2015 ◽  
Vol 119 (33) ◽  
pp. 19279-19286 ◽  
Author(s):  
Masaaki Yoshida ◽  
Yosuke Mitsutomi ◽  
Takehiro Mineo ◽  
Masanari Nagasaka ◽  
Hayato Yuzawa ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Absorption Spectroscopy ◽  
Direct Observation ◽  
Water Oxidation ◽  
Oxide Cluster ◽  
X Ray ◽  
X Ray Absorption

X-ray Absorption Spectroscopy of the Water Oxidation Complex of PS II

1995 ◽  
pp. 1279-1282
Author(s):  
Sandra Turconi ◽  
Colin P. Horwitz ◽  
S. T. Weintraub ◽  
Joseph T. Warden ◽  
Jonathan H. A. Nugent ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Water Oxidation ◽  
Ps Ii ◽  
X Ray ◽  
X Ray Absorption

Weakened CO adsorption and enhanced structural integrity of a stabilized Pt skin/PtCo hydrogen oxidation catalyst analysed by in situ X-ray absorption spectroscopy

2017 ◽  
Vol 7 (24) ◽  
pp. 6124-6131 ◽  
Author(s):  
Guoyu Shi ◽  
Hiroshi Yano ◽  
Donald A. Tryk ◽  
Masashi Matsumoto ◽  
Hajime Tanida ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Structural Integrity ◽  
Hydrogen Oxidation ◽  
Co Adsorption ◽  
Oxidation Catalyst ◽  
X Ray ◽  
X Ray Absorption ◽  
Ptco Alloy

In situ X-ray absorption spectroscopy has afforded a detailed structural and electronic characterization of a newly developed stabilized Pt-skin/PtCo alloy nanoparticle catalyst for CO-tolerant H2 oxidation.

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.

scholarly journals Operando tracking of oxidation-state changes by coupling electrochemistry with time-resolved X-ray absorption spectroscopy demonstrated for water oxidation by a cobalt-based catalyst film

2021 ◽  
Author(s):  
Chiara Pasquini ◽  
Si Liu ◽  
Petko Chernev ◽  
Diego Gonzalez-Flores ◽  
Mohammad Reza Mohammadi ◽  
...  
Keyword(s):  
Oxidation State ◽  
Absorption Spectroscopy ◽  
Performance Optimization ◽  
Water Oxidation ◽  
Electrochemical Techniques ◽  
Time Resolved ◽  
Catalytic Current ◽  
X Ray ◽  
State Changes ◽  
X Ray Absorption

AbstractTransition metal oxides are promising electrocatalysts for water oxidation, i.e., the oxygen evolution reaction (OER), which is critical in electrochemical production of non-fossil fuels. The involvement of oxidation state changes of the metal in OER electrocatalysis is increasingly recognized in the literature. Tracing these oxidation states under operation conditions could provide relevant information for performance optimization and development of durable catalysts, but further methodical developments are needed. Here, we propose a strategy to use single-energy X-ray absorption spectroscopy for monitoring metal oxidation-state changes during OER operation with millisecond time resolution. The procedure to obtain time-resolved oxidation state values, using two calibration curves, is explained in detail. We demonstrate the significance of this approach as well as possible sources of data misinterpretation. We conclude that the combination of X-ray absorption spectroscopy with electrochemical techniques allows us to investigate the kinetics of redox transitions and to distinguish the catalytic current from the redox current. Tracking of the oxidation state changes of Co ions in electrodeposited oxide films during cyclic voltammetry in neutral pH electrolyte serves as a proof of principle. Graphical abstract

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