scholarly journals Water adsorption, dissociation and oxidation on SrTiO3 and ferroelectric surfaces revealed by ambient pressure X-ray photoelectron spectroscopy

2019 ◽  
Vol 21 (9) ◽  
pp. 4920-4930 ◽  
Author(s):  
Neus Domingo ◽  
Elzbieta Pach ◽  
Kumara Cordero-Edwards ◽  
Virginia Pérez-Dieste ◽  
Carlos Escudero ◽  
...  
Keyword(s):  
Surface Water ◽  
Photoelectron Spectroscopy ◽  
Redox Reactions ◽  
Water Adsorption ◽  
Ambient Pressure ◽  
Atmospheric Conditions ◽  
X Ray ◽  
Surface Adsorbates ◽  
Ferroelectric Surfaces ◽  
Ferroelectric Oxides

Unveiling surface adsorbates under atmospheric conditions and in surface water redox reactions on TiO2 terminated surfaces and ferroelectric oxides, as studied by AP-XPS.

In situ investigation of water on MXene interfaces

2021 ◽  
Vol 118 (49) ◽  
pp. e2108325118
Author(s):  
Wahid Zaman ◽  
Ray A. Matsumoto ◽  
Matthew W. Thompson ◽  
Yu-Hsuan Liu ◽  
Yousuf Bootwala ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Water Adsorption ◽  
Elevated Temperatures ◽  
Ambient Pressure ◽  
Transition Metal Carbide ◽  
Water Removal ◽  
Water Mobility ◽  
Level Control ◽  
X Ray ◽  
In Situ Investigation

A continuum of water populations can exist in nanoscale layered materials, which impacts transport phenomena relevant for separation, adsorption, and charge storage processes. Quantification and direct interrogation of water structure and organization are important in order to design materials with molecular-level control for emerging energy and water applications. Through combining molecular simulations with ambient-pressure X-ray photoelectron spectroscopy, X-ray diffraction, and diffuse reflectance infrared Fourier transform spectroscopy, we directly probe hydration mechanisms at confined and nonconfined regions in nanolayered transition-metal carbide materials. Hydrophobic (K+) cations decrease water mobility within the confined interlayer and accelerate water removal at nonconfined surfaces. Hydrophilic cations (Li+) increase water mobility within the confined interlayer and decrease water-removal rates at nonconfined surfaces. Solutes, rather than the surface terminating groups, are shown to be more impactful on the kinetics of water adsorption and desorption. Calculations from grand canonical molecular dynamics demonstrate that hydrophilic cations (Li+) actively aid in water adsorption at MXene interfaces. In contrast, hydrophobic cations (K+) weakly interact with water, leading to higher degrees of water ordering (orientation) and faster removal at elevated temperatures.

Operando Ambient Pressure X-ray Photoelectron Spectroscopy Studies of Sodium–Oxygen Redox Reactions

2018 ◽  
Vol 61 (20) ◽  
pp. 2123-2128 ◽  
Author(s):  
Baohua Mao ◽  
Yang Dai ◽  
Jun Cai ◽  
Qingtian Li ◽  
Chenggong Jiang ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Redox Reactions ◽  
Ambient Pressure ◽  
X Ray ◽  
Spectroscopy Studies

scholarly journals In Situ Ambient Pressure X-ray Photoelectron Spectroscopy Studies of Lithium-Oxygen Redox Reactions

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Yi-Chun Lu ◽  
Ethan J. Crumlin ◽  
Gabriel M. Veith ◽  
Jonathon R. Harding ◽  
Eva Mutoro ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Redox Reactions ◽  
Ambient Pressure ◽  
X Ray ◽  
Spectroscopy Studies
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