Unravelling the interfacial water structure at the photocatalyst strontium titanate by sum frequency generation spectroscopy

Buessler, Martin; Maruyama, Shingo; Zelenka, Moritz; Onishi, Hiroshi; Backus, Ellen H.G.

doi:10.1039/d3cp03829g

Phys. Chem. Chem. Phys.

2023

DOI: 10.1039/d3cp03829g

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Unravelling the interfacial water structure at the photocatalyst strontium titanate by sum frequency generation spectroscopy

Martin Buessler,

Shingo Maruyama,

Moritz Zelenka

et al.

Abstract: Unravelling the water structure at the interface between the photocatalyst strontium titanate and water by sum frequency generation spectroscopy.

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2024

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References 44 publications

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Sum-Frequency Generation Spectroscopy at Aqueous Electrochemical Interfaces

Pham,

Ranjbari,

Tadjeddine

et al. 2024

Symmetry

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The electrochemical interface (EI) is the determining factor in the yield and mechanism of sustainable energy storage and conversion systems due to its intrinsic functionality as a dynamic junction with the symmetry breaking of the molecular arrangement for complex reaction fields of mass transport and heterogeneous electron transfer. At the EI, the externally applied potential stimulus drives the formation of the electrical double layer (EDL) and governs the adsorption of interfacial adsorbate species in aqueous electrolyte solutions. Water and its aqueous electrolyte systems are integral and quintessential elements in the technological innovation of various fields such as environmental sciences, electrocatalysis, photocatalysis, and biochemistry. Although deciphering the structure and orientation of water molecules at the electrode–electrolyte interface in a quantitative analysis is of utmost importance, assessing chemical phenomena at the buried EI was rather challenging due to the intricacy of selecting interface-specific methodologies. Based on the non-centrosymmetry of the interfaces’ electronic properties, sum-frequency generation (SFG) spectroscopy has been manifested to be specifically well suited for probing the EI with detailed and comprehensive characteristics of adsorbates’ chemical structures and electrochemical events. In this review, we holistically engage in a methodical and scrupulous assessment of the fundamental EDL models and navigate towards the connection of the renowned Stark effect and potential dependence of SFG spectra at heterogeneous electrode–electrolyte interfaces. We dissect the development, advantages, and available geometrical configurations of in situ SFG spectroscopy in harnessing the EI. A broad spectrum of applications in unraveling the water orientations and rationalizing the convoluted mechanism of fuel-generated electrocatalytic reactions with particular encumbrances and potential resolutions is underscored by leveraging SFG spectroscopy.

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Sum-Frequency Generation Spectroscopy at Aqueous Electrochemical Interfaces

Pham,

Ranjbari,

Tadjeddine

et al. 2024

Symmetry

View full text Add to dashboard Cite

show abstract

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Unravelling the interfacial water structure at the photocatalyst strontium titanate by sum frequency generation spectroscopy

Abstract: Unravelling the water structure at the interface between the photocatalyst strontium titanate and water by sum frequency generation spectroscopy.

Cited by 1 publication

References 44 publications

Sum-Frequency Generation Spectroscopy at Aqueous Electrochemical Interfaces

Sum-Frequency Generation Spectroscopy at Aqueous Electrochemical Interfaces

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