
Ex Situ and Operando XRD and XAS Analysis of MoS2: A Lithiation …
2019年9月26日 · Ex situ XAS provides additional structural insights into the local structure of MoS 2, confirming that the 1T′ phase is the correct assignment of the nanosheet MoS 2 and revealing an irreversible local distortion that occurs during cycling. This local distortion is likely a factor in the increased capacity fade observed in the nanosheet cells.
Lanthanide transport in angstrom-scale MoS2-based two
2024年3月15日 · X-ray absorption spectroscopy (XAS), uptake kinetics tests, and molecular dynamics (MD) simulations reveal that Sm 3+, being less dehydrated, enters the 2D channel much faster than the other REE ions which governs its dominating uptake.
使用瞬态 XAS 检测基于 MoS2 的加氢处理催化剂活性位点的可逆 …
将调制激发光谱 (MES) 与时间分辨 X 射线吸收光谱 (XAS) 结合应用于非促进和共同促进的 Mo 基加氢处理催化剂(即Mo 和 CoMo 催化剂),以研究在H 2 S 和 H 2 O影响下的活性位点组成。
Dynamic evolution and reversibility of single-atom Ni (II
2020年8月17日 · Using in situ X-ray absorption spectroscopy (XAS), we show that the dominant active site for HER is the Ni single atom in its intrinsic environment in an acidic electrolyte, while, in alkaline...
Atomically engineering activation sites onto metallic 1T-MoS2 …
2019年2月28日 · Synchrotron-based X-ray absorption spectroscopy (XAS) was used to characterize the local structure of 1T-MoS 2 and XO@1T-MoS 2 analogs.
Using Transient XAS to Detect Minute Levels of Reversible S-O …
2021年12月23日 · In this work, d. functional theory (DFT), catalytic activity tests, and in-situ X-ray absorption spectroscopy (XAS) was performed to gain detailed insights into the activity and stability of MoS2, Ni-MoS2, and Co-MoS2 catalysts used for hydrodeoxygenation (HDO) of ethylene glycol upon variation of the partial pressures of H2O and H2S.
In Situ XAFS Studies of MoS2 Anodes for Li-Ion Batteries
2016年6月10日 · To better understand this mechanism, in-situ characterization with element specific X-ray absorption spectroscopy (XAS), specifically X-ray absorption near-edge spectroscopy (XANES) and extended X-ray absorption fine-structure spectroscopy (EXAFS) was used in this study.
Identifying the single active site in MoS2-based hydrogen …
2020年10月1日 · The XAFS and XAS results reveal that the Co single atom was anchored on the Mo atop sites with Co 2+ valence. DFT calculations confirm that the active sites are S atoms bonding with Co single atom, which result in the enhanced HER performance. This work shows that the Co 1 /MoS 2 nanosheet is a highly potential electrocatalyst used for HER.
Ex Situ and In Situ XRD and XAS Analysis of MoS2: A
2019年9月26日 · Here, we combine operando Mo K- and S K-edge X-ray absorption spectroscopy (XAS) with first-principles simulations to track changes in the electronic structure of MoS2 nanosheets during CO2RR.
Iron-molybdenum sulfide electrocatalysts for the hydrogen …
2025年2月1日 · In this study, we employed X-ray absorption spectroscopy (XAS) to study iron-molybdenum and molybdenum sulfides obtained by a microwave irradiation synthetic approach. Operando XAS measurements in an acidic environment revealed sulfur-defective amorphous MoS x and FeS phases.