Nanotubular Geometry for Stabilizing Metastable 1T‐Phase Ru Dichalcogenides

Abstract

electrochemical fields such as water splitting, supercapacitors, and lithium/sodium batteries. [1][2][3][4][5] Unfortunately, however, the metastable 1T phase requires a higher formation energy (∆E form ) than the thermodynamically stable 2H phase. Hence, bottom-up methods for synthesizing TMDs usually produce 2H-dominated phases containing unsatisfactory 1T contents (e.g., 50-83%), and TMDs containing ≈100% of the 1T phase can only be synthesized using time-consuming processes [e.g., chemical vapor transport and chemical vapor deposition]. [6][7][8] Even if a high 1T phase content is obtained, the 1T phase reverts to the more thermodynamically stable 2H (or cubic) phase under ambient conditions. [7,9,10] To overcome this limitation, several strategies (such as alkali metal intercalation, plasma induction, and defect and strain engineering) for preparing high-purity and stabilized 1T-phase-containing materials have been reported. Ma et al. showed that the co-intercalation of alkali metal cations (Li + , Na + , and K + ) can expand the interlayer spacing of MoS 2 , thereby enhancing its phase stability. [11] Additionally, the presence of defects changed the electronic structure of pristine PdSe 2 , which subsequently stabilized the metastable monoclinic polymorphic phase. [12] Very recently, Huang et al. demonstrated that monolayer 1T MoS 2 exhibitsThe ORCID identification number(s) for the author(s) of this article can be found under

Interfacial Heterojunction Electronic Modulation on RuSe2@NiFeLDH Heterostructures for Water Splitting

“…17,18 When compared to Pt and Ir, Ru-based catalysts possess a lower cost and higher activity than Ir. 19,20 Se-based catalysts possess flexible coordination modes, better conductivity, and less ionization energy. Transition-metal-based selenides exhibit less resistivity and also help in accelerating the electrons in the conduction band that makes it a better catalyst for electrochemical water splitting.…”

“…Due to this, the LDH volume reduces that decreases electrochemical activity . Fabricating LDHs with highly conducting transition-metal chalcogenides helps to a better catalyst for electrochemical water splitting. − Ruthenium belongs to platinum-related metals with high d-orbital electrons that provide ideal adsorption energy for oxygen and hydrogen. , Ruthenium costs 1/5th of Pt metal and exhibits a similar range of metal hydrogen bond strengths, resulting in a better catalyst for electrochemical water splitting. , When compared to Pt and Ir, Ru-based catalysts possess a lower cost and higher activity than Ir. , Se-based catalysts possess flexible coordination modes, better conductivity, and less ionization energy. Transition-metal-based selenides exhibit less resistivity and also help in accelerating the electrons in the conduction band that makes it a better catalyst for electrochemical water splitting .…”