In-situ observation of the crystal structure transition of Pt-Sn intermetallic nanoparticles during deactivation and regeneration

2021 ◽  
Author(s):  
Ze-Qi Zhang ◽  
Yuchen Pei ◽  
Mingjun Xiao ◽  
Guowen Hu ◽  
Zhi-Peng Huang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Catalytic Activity ◽  
Intermetallic Compounds ◽  
In Situ Observation ◽  
Structure Transition ◽  
Atomic Structures ◽  
Intermetallic Nanoparticles

Intermetallic compounds nanoparticles (iNPs) have attracted great attention as efficient catalysts for improved activity and selectivity. As the catalytic activity of the iNPs is strongly associated with their atomic structures,...

In Situ Observation of Chymotrypsin Catalytic Activity Change Actuated by Nonheating Low-Frequency Magnetic Field

ACS Nano ◽  
2018 ◽  
Vol 12 (4) ◽  
pp. 3190-3199 ◽  
Author(s):  
Maria V. Efremova ◽  
Maxim M. Veselov ◽  
Alexander V. Barulin ◽  
Sergey L. Gribanovsky ◽  
Irina M. Le-Deygen ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Catalytic Activity ◽  
Low Frequency ◽  
In Situ Observation ◽  
Activity Change ◽  
Frequency Magnetic Field

Amorphisation Tendency of Intermetallic Compounds Under Electron Irradiation

1986 ◽  
Vol 74 ◽  
Author(s):  
D. E. Luzzi ◽  
M. Meshii
Keyword(s):  
Crystal Structure ◽  
Intermetallic Compounds ◽  
Electron Irradiation ◽  
Alloy System ◽  
Metal Compounds ◽  
Complex Crystal Structure ◽  
In Situ Experiments ◽  
Binary Alloy System ◽  
Disordered Crystal

AbstractThe chemical disordering model for the electron irradiation induced crystalline to amorphous (C-A) transition was previously developed using in-situ experiments in the intermetallic compounds of the Cu-Ti binary alloy system. In the context of this model, a rule was developed which predicts the amorphisation tendency of these and other binary intertransition metal compounds with an accuracy of 92% in the 38 compounds studied to date. Two aspects of this rule, the composition of the compound and the crystal structure are examined through a first approximation computer comparison of ordered, partially ordered, and disordered crystal structures. It is found that in bcc based compounds and in complex crystal structure compounds, the ability of the chemical disordering to raise the energy of the crystal is severely inhibited at compound compositions away from 50:50. During the disordering process, the greatest increase of the crystal energy occurs during the early stages of chemical disordering. These results mesh well with the concept of an amorphous transition driven by the energy increase due to chemical disordering.

In Situ Observation on Bubble Behavior of Solidifying Al-Ni Alloy Under the Interference of Intermetallic Compounds

2018 ◽  
Vol 49 (10) ◽  
pp. 4429-4434 ◽  
Author(s):  
Siyu Sun ◽  
Qiaodan Hu ◽  
Wenquan Lu ◽  
Zongye Ding ◽  
Mingxu Xia ◽  
...  
Keyword(s):  
Intermetallic Compounds ◽  
In Situ Observation ◽  
Bubble Behavior ◽  
Ni Alloy

scholarly journals In situ observation of reactive oxygen species forming on oxygen-evolving iridium surfaces

2017 ◽  
Vol 8 (3) ◽  
pp. 2143-2149 ◽  
Author(s):  
Verena Pfeifer ◽  
Travis E. Jones ◽  
Juan J. Velasco Vélez ◽  
Rosa Arrigo ◽  
Simone Piccinin ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Catalytic Activity ◽  
Reactive Oxygen ◽  
In Situ Observation ◽  
Oxygen Species ◽  
In Situ Xas ◽  
Oxygen Evolving

In situ XAS measurements reveal that electron-deficient oxygen species form during OER on IrOx and correlate with catalytic activity.

In situ observation of phase formation in a Cu–In–2Se precursor layer using micro-Raman scattering spectroscopy

2009 ◽  
Vol 24 (7) ◽  
pp. 2373-2377 ◽  
Author(s):  
Deliang Wang ◽  
Yongsheng Cao ◽  
Lei Wan
Keyword(s):  
Vapor Pressure ◽  
Raman Scattering ◽  
Atomic Ratio ◽  
In Situ Observation ◽  
Amorphous Precursor ◽  
Temperature Dependent ◽  
Raman Scattering Spectroscopy ◽  
Atomic Structures ◽  
Precursor Layer

In situ observation of phase formations in Cu–In–2Se (atomic ratio) precursor layers was carried out using temperature-dependent micro-Raman scattering spectroscopy. Without the protection of a high Se vapor pressure, intermediate In–Se and Cu–Se selenides and CuAu-ordered CuInSe2 (CIS) were easily formed in the amorphous precursor layer, which have atomic structures arranged in a way close to that of α-CIS. The binary selenides were transformed to the α-CIS by in-/out-diffusion of the mobile Cu and Se atoms/ions. The γ-CuSe and α-CIS began to form at a temperature as low as ∼170 °C.

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