The 2p3/2 binding energy shift of Fe surface and Fe nanoparticles

Wang, Y.; Wang, L.L.; Sun, Chang Q.

doi:10.1016/j.cplett.2009.09.017

Cited by 18 publications

(10 citation statements)

References 46 publications

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“…The XPS profiles for the elements Fe and S in the pristine FeS 2 sample are presented in Fig. 5a and 35 The individual peaks at 162.6 and 162.0 eV could be attributed to the S 2 2− and surface-state S 2 2− components, while the peak at 161.3 eV was related to the 2p spin orbital of the S 2− component (Fig. 5d).…”

Section: Resultsmentioning

confidence: 99%

CoS₂Coatings for Improving Thermal Stability and Electrochemical Performance of FeS₂Cathodes for Thermal Batteries

Ning

Liu

Xie

et al. 2018

J. Electrochem. Soc.

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The cathode material pyrite (FeS 2 ) (core) was coated with 2.5, 5.0, 7.5, and 10.0 wt% CoS 2 (shell) (denoted as FeS 2 @CoS 2 ) by the hydrothermal method and a subsequent heat-treatment to form composites with enhanced thermal stability and electrochemical performance. Importantly, results indicate indicated that CoS 2 particles with a complete crystal structure had been successfully coated on the FeS 2 surface. The sample coated with the optimal amount of CoS 2 , which was determined to be 7.5 wt%, showed the highest thermal decomposition temperature (610.6 • C) and excellent specific capacity (as high as 320 mA h g −1 at 520 • C and 200 mA cm −2 at a cutoff voltage of 1.6 V), in compared to that of pure FeS 2 (551.3 • C, 240 mA h g −1 ). Because CoS 2 is an excellent electrical conductor, the surface of FeS 2 is modified by CoS 2 , which leads to the change of the microstructure of FeS 2 surface, which enhances the intercalation of ionic electrolyte and enhances the electrical conductivity of FeS 2 . In the meantime, CoS 2 has high thermal stability and exhibits low solubility in the molten electrolyte, which reduces the elemental sulfur loss of FeS 2 during discharge and thereby increases the electrochemical capacity.

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Section: Resultsmentioning

confidence: 99%

CoS₂Coatings for Improving Thermal Stability and Electrochemical Performance of FeS₂Cathodes for Thermal Batteries

Ning

Liu

Xie

et al. 2018

J. Electrochem. Soc.

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“…because of the localized nature of the eigen wavefunction for electrons in the core shells. 65 Therefore, we have a general form for the size and surface induced core level shift:…”

Section: Bols-enhanced Capability Of Available Techniquesmentioning

confidence: 99%

Dominance of broken bonds and nonbonding electrons at the nanoscale

2010

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Although they exist ubiquitously in human bodies and our surroundings, the impact of nonbonding lone electrons and lone electron pairs has long been underestimated. Recent progress demonstrates that: (i) in addition to the shorter and stronger bonds between under-coordinated atoms that initiate the size trends of the otherwise constant bulk properties when a substance turns into the nanoscale, the presence of lone electrons near to broken bonds generates fascinating phenomena that bulk materials do not demonstrate; (ii) the lone electron pairs and the lone pair-induced dipoles associated with C, N, O, and F tetrahedral coordination bonding form functional groups in biological, organic, and inorganic specimens. By taking examples of surface vacancy, atomic chain end and terrace edge states, catalytic enhancement, conducting-insulating transitions of metal clusters, defect magnetism, Coulomb repulsion at nanoscale contacts, Cu(3)C(2)H(2) and Cu(3)O(2) surface dipole formation, lone pair neutralized interface stress, etc, this article will focus on the development and applications of theory regarding the energetics and dynamics of nonbonding electrons, aiming to raise the awareness of their revolutionary impact to the society. Discussion will also extend to the prospective impacts of nonbonding electrons on mysteries such as catalytic enhancement and catalysts design, the density anomalies of ice and negative thermal expansion, high critical temperature superconductivity induced by B, C, N, O, and F, the molecular structures and functionalities of CF(4) in anti-coagulation of synthetic blood, NO signaling, and enzyme telomeres, etc. Meanwhile, an emphasis is placed on the necessity and effectiveness of understanding the properties of substances from the perspective of bond and nonbond formation, dissociation, relaxation and vibration, and the associated energetics and dynamics of charge repopulation, polarization, densification, and localization. Finding and grasping the factors controlling the nonbonding states and making them of use in functional materials design and identifying their limitations will form, in the near future, a subject area of "nonbonding electronics and energetics", which could be even more challenging, fascinating, promising, and rewarding than dealing with core or valence electrons alone.

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“…From the XPS spectrum bulk component whose maximal width is 2za (0.1-1.0 eV level), one can estimate that the t is in <10 À(1$2) eV order. 101 The a is in the 10 0 eVs level. Therefore, the BE shift is dominated by a and is proportional to the bond energy, E b .…”

Section: 13mentioning

confidence: 99%

Underneath the fascinations of carbon nanotubes and graphene nanoribbons

Zheng

Sun

2011

Energy Environ. Sci.

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The 2p3/2 binding energy shift of Fe surface and Fe nanoparticles

Cited by 18 publications

References 46 publications

CoS₂Coatings for Improving Thermal Stability and Electrochemical Performance of FeS₂Cathodes for Thermal Batteries

CoS₂Coatings for Improving Thermal Stability and Electrochemical Performance of FeS₂Cathodes for Thermal Batteries

Dominance of broken bonds and nonbonding electrons at the nanoscale

Underneath the fascinations of carbon nanotubes and graphene nanoribbons

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The 2p3/2 binding energy shift of Fe surface and Fe nanoparticles

Cited by 18 publications

References 46 publications

CoS2Coatings for Improving Thermal Stability and Electrochemical Performance of FeS2Cathodes for Thermal Batteries

CoS2Coatings for Improving Thermal Stability and Electrochemical Performance of FeS2Cathodes for Thermal Batteries

Dominance of broken bonds and nonbonding electrons at the nanoscale

Underneath the fascinations of carbon nanotubes and graphene nanoribbons

Contact Info

Product

Resources

About

CoS₂Coatings for Improving Thermal Stability and Electrochemical Performance of FeS₂Cathodes for Thermal Batteries

CoS₂Coatings for Improving Thermal Stability and Electrochemical Performance of FeS₂Cathodes for Thermal Batteries