Electronic Support Effects of Tunable Mixed Metal Oxides on Immobilized Palladium N‐Heterocyclic Carbene Complexes

Finn, Matthew D.; Donahue, Courtney M.; Blake, Anastasia V.; An, Nan; Daly, Scott R.; Voutchkova‐Kostal, Adelina

doi:10.1002/ejic.201800220

Cited by 3 publications

(2 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cl K -edge X-ray absorption near-edge structure (XANES) measurements were first performed to identify the chemical state of Cl groups on MXenes (Figure a). An observable pre-edge absorption peak is observed, which arises from the transition between the Cl 1s orbital and the p-d hybrid orbital. , The normalized peak intensity can be used to analyze the covalency of metal-Cl bonds . The intensity of the pre-edge absorption peak is reduced in p-Nb 2 CT x compared with that of Nb 2 CT x , reflecting a lower covalency of Nb–Cl bonds in p-Nb 2 CT x .…”

Section: Resultsmentioning

confidence: 99%

Operando Exploring and Modulating Phase Evolution Chemistry from MAX to MXenes in Molten Salt Synthesis

Wei

Zhang

et al. 2023

J. Am. Chem. Soc.

View full text Add to dashboard Cite

Lewis acidic molten salt method is a promising synthesis strategy for achieving MXenes with controllable surface termination from numerous MAX materials. Understanding the phase evolution chemistry during etching and post-processing is highly desirable but remains a key challenge due to the lack of suitable in-situ characterizations and the complexity of the reaction process. Herein, we introduce an operando synchrotron radiation X-ray diffraction (SRXRD) technique to unveil the phase evolution process of Nb2GaC MAX under a molten-salt ambient, proposing a controllable synthesis to achieve optimal etching through precise temperature and time adjustment. Subsequently, the phase structure of Nb2CT x MXenes is successfully tailored from hexagonal to amorphous by time-dependent persulfate oxidation. The resulting amorphous Nb2CT x with a well-patterned morphology and numerous chloride terminations exhibits highly improved specific capacity, rate capability, and long cycling for Li+ storage with a Cl-containing surface protective film. Addressing the time-related phase evolution during the entire molten salt strategy provides new insights into achieving higher efficiency and controllability in preparing MXenes and shows great potential in high-performance energy storage systems based on MXenes.

show abstract

Section: Resultsmentioning

confidence: 99%

Operando Exploring and Modulating Phase Evolution Chemistry from MAX to MXenes in Molten Salt Synthesis

Wei

Zhang

et al. 2023

J. Am. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…In the original article, we forgot to include the following sentence in the “Acknowledgements” section: A. M. V. K. sincerely thanks NSF for funding through NSF CAREER award 1554963.…”

mentioning

confidence: 99%