EXAFS spectroelectrochemistry

Sharpe, Lee R.; Heineman, William R.; Elder, R. C.

doi:10.1021/cr00103a002

Cited by 82 publications

(41 citation statements)

References 26 publications

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“…In the last decades, due to the relatively simple instrumentation, XAS using hard x-rays has been widely utilized to carry out in situ investigation of important electrochemical processes [11][12][13]. Nevertheless, the electronic information about the 3d electrons in transition metals and their compounds is inaccessible from K-edge spectra due to dipole selection rule.…”

Section: Methodsmentioning

confidence: 99%

In situ soft X-ray absorption spectroscopy investigation of electrochemical corrosion of copper in aqueous NaHCO3 solution

Peng

Chen

Borondics

et al. 2010

Electrochemistry Communications

101

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A novel electrochemical setup has been developed for soft x-ray absorption studies of the electronic structure of electrode materials during electrochemical cycling. In this communication we illustrate the operation of the cell with a study of the corrosion behavior of copper in aqueous NaHCO 3 solution via the electrochemically induced changes of its electronic structure. This development opens the 2 way for in situ investigations of electrochemical processes, photovoltaics, batteries, fuel cells, water splitting, corrosion, electrodeposition, and a variety of important biological processes.

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Section: Methodsmentioning

confidence: 99%

In situ soft X-ray absorption spectroscopy investigation of electrochemical corrosion of copper in aqueous NaHCO3 solution

Peng

Chen

Borondics

et al. 2010

Electrochemistry Communications

101

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“…Extended X-ray absorption fine structure (EXAFS) can provide valuable information about the structure of metal alloys, since it is the only spectroscopic technique that gives information on the local structure around Pd, the Pd-support oxide interaction and/or the Pd bimetal nanoparticle formation [221][222][223].…”

Section: Extended X-ray Absorption Fine Structure (Exafs)mentioning

confidence: 99%

Upgrading Lignocellulosic Biomasses: Hydrogenolysis of Platform Derived Molecules Promoted by Heterogeneous Pd-Fe Catalysts

et al. 2017

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Abstract:This review provides an overview of heterogeneous bimetallic Pd-Fe catalysts in the C-C and C-O cleavage of platform molecules such as C2-C6 polyols, furfural, phenol derivatives and aromatic ethers that are all easily obtainable from renewable cellulose, hemicellulose and lignin (the major components of lignocellulosic biomasses). The interaction between palladium and iron affords bimetallic Pd-Fe sites (ensemble or alloy) that were found to be very active in several sustainable reactions including hydrogenolysis, catalytic transfer hydrogenolysis (CTH) and aqueous phase reforming (APR) that will be highlighted. This contribution concentrates also on the different synthetic strategies (incipient wetness impregnation, deposition-precipitaion, co-precipitaion) adopted for the preparation of heterogeneous Pd-Fe systems as well as on the main characterization techniques used (XRD, TEM, H 2 -TPR, XPS and EXAFS) in order to elucidate the key factors that influence the unique catalytic performances observed.

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“…One important research is about the CO adsorption on 0.6% Rh/γ-Al 2 O 3 . The Rh-Rh peak would disappear after CO adsorption, indicating that the Rh-Rh bonds were broken by CO [69]. Thus, the adsorption of the reactant molecules may alter the structure of the metal clusters.…”

Section: Connections Between Geometrical Structure and Electronic Strmentioning

confidence: 99%

“…When Rh and Ir are supported on SiO 2 , Ir would segregatively grow on the Ir core. However, Ir and Rh choose to homogeneously distribute when loaded on Al 2 O 3 , and the coordination unsaturation was higher because the planar raft structure was formed [69]. Also, Pt was of particle shape on γ-Al 2 O 3 (1% loading amount), while raft structure was generated when supported on η-Al 2 O 3 [69].…”

Section: Positional Relationship Between Multiple Active Sitesmentioning

confidence: 99%

The electronic structure and geometric structure of nanoclusters as catalytic active sites

2013

Nanotechnology Reviews

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Abstract:In the past few decades, metal nanoparticles applied in heterogeneous catalysis have attracted extensive attention. The term nanocatalysis is broadly referred to as the unique catalytic effect of this series of materials. Although considerable progress has been made in nanocatalysis, it still remains a great challenge to fully understand the nature of active sites in the nanoscale. Many concepts and models have been put forwarded to describe the properties and performances of nano-and subnanoparticles in catalysis. In this review, we propose our perspective on the active sites of heterogeneous catalysis from the aspects of electronic structure and geometric structure of nanoclusters and consider briefly how these clusters function in catalysis. The challenge in nanocatalysis research methods is also discussed.

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EXAFS spectroelectrochemistry

Cited by 82 publications

References 26 publications

In situ soft X-ray absorption spectroscopy investigation of electrochemical corrosion of copper in aqueous NaHCO3 solution

In situ soft X-ray absorption spectroscopy investigation of electrochemical corrosion of copper in aqueous NaHCO3 solution

Upgrading Lignocellulosic Biomasses: Hydrogenolysis of Platform Derived Molecules Promoted by Heterogeneous Pd-Fe Catalysts

The electronic structure and geometric structure of nanoclusters as catalytic active sites

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