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CO2-driven Oxygen Vacancy Diffusion and Healing on TiO2(110) at Ambient Pressure.
Angew Chem Int Ed Engl
January 2025
KAIST - Korea Advanced Institute of Science and Technology, Department of Chemistry, Center for Nanomaterials and Chemical Reaction, IBS, 373-1, Guseong Dong, Yuseong Gu, 305-701, Daejeon, KOREA, REPUBLIC OF.
Understanding how TiO2 interacts with CO2 at the molecular level is crucial in the CO2 reduction toward value-added energy sources. Here, we report in-situ observations of the CO2 activation process on the reduced TiO2(110) surface at room temperature using ambient pressure scanning tunneling microscopy. We found that oxygen vacancies (Vo) diffuse dynamically along the bridging oxygen (Obr) rows of the TiO2(110) surface under ambient CO2(g) environments.
View Article and Find Full Text PDFRole of the Coreactant on the Dual-Source Behavior of Lithium Hexamethyldisilazide for ALD Li-Containing Films.
J Phys Chem C Nanomater Interfaces
November 2024
Department of Applied Physics and Science Education, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands.
Atomic layer deposition (ALD) of Li-containing thin films is deemed as highly relevant for the development of next-generation Li-ion batteries. Lithium hexamethyldisilazide (LiHMDS), as Li-containing precursor, is preferred over the widely used lithium -butoxide because of its lower melting point of 70 °C. However, the presence of silyl groups in the LiHMDS chemical structure can result in the undesired incorporation of Si in the film.
View Article and Find Full Text PDFVibrational sum frequency generation (VSFG) spectroscopy of water adsorption on surfaces of yttria-stabilized cubic zirconia (YSZ).
J Chem Phys
November 2024
Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA.
Yttria-stabilized zirconia (YSZ) is found in a wide range of applications, from solid-oxide fuel cells to medical devices and implants. A molecular-level understanding of the hydration of YSZ surfaces is essential for optimizing its performance and durability in these applications. Nevertheless, only a limited amount of literature is available about the surface hydration of YSZ single crystals.
View Article and Find Full Text PDFSurface Coordination Chemistry of Graphitic Carbon Nitride from Ag Molecular Probes.
Angew Chem Int Ed Engl
November 2024
Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093, Zürich, Switzerland.
Graphitic carbon nitride (g-CN) has gained significant attention for its catalytic properties, especially in the development of Single Atom Catalysts (SACs). However, the surface chemistry underlying the formation of these isolated metal sites remains poorly understood. In this study we employ Surface OrganoMetallic Chemistry (SOMC) together with advanced microscopic and spectroscopic techniques for an in-depth analysis of functionalized g-CN materials, where tailored organosilver probe molecules are used to monitor surface processes and characterize resulting surface species.
View Article and Find Full Text PDFMicroscopic and macroscopic analysis of hexavalent chromium adsorption on polypyrrole-polyaniline@rice husk ash adsorbent using statistical physics modeling.
Heliyon
September 2024
Laboratory of Quantum and Statistical Physics LR 18 ES 18, Faculty of Sciences of Monastir, Environnement Street, 5019, Monastir, Tunisia.
This paper contributed with new findings to understand and characterize a heavy metal adsorption on a composite adsorbent. The synthesized polypyrrole-polyaniline@rice husk ash (PPY-PANI@RHA) was prepared and used as an adsorbent for the removal of hexavalent chromium Cr(VI). The adsorption isotherms of Cr(VI) ions on PPY-PANI@RHA were experimentally determined at pH 2, and at different adsorption temperatures (293, 303, and 313 K).
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