Spectroscopic Investigations of Oxide Surface Reactions

Spectroscopic investigations of oxide surface reactions lie at the heart of our understanding of processes ranging from heterogeneous catalysis to corrosion and environmental remediation. By probing the electronic structure, chemical speciation and dynamical evolution of oxide surfaces under realistic conditions, modern spectroscopy has revealed how oxygen, water and organic species adsorb, dissociate and react at atomic‐scale defects, step edges and domain boundaries. Techniques such as X-ray photoelectron spectroscopy, surface X-ray diffraction, vibrational spectroscopy and sum-frequency generation allow the identification of transient intermediates, the quantification of oxidation states and the mapping of adsorbate geometries in situ and in operando. These insights have demonstrated that undercoordinated metal ions, interfacial strain fields and support effects critically influence reaction pathways. Advances in time-resolved methods now permit tracking of surface reactions on millisecond to second timescales, opening avenues for correlating spectroscopic signatures with catalytic turnover rates. Collectively, these approaches underpin the rational design of improved oxide catalysts and corrosion-resistant coatings by linking atomic‐level mechanisms to macroscopic performance.

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Spectroscopic Investigations of Oxide Surface Reactions publication trend

The graph below shows the total number of articles in spectroscopic investigations of oxide surface reactions across all publications each year (not limited to Nature Index journals).

Technical terms

X-ray Photoelectron Spectroscopy (XPS): A surface‐sensitive technique that measures the binding energies of core electrons to determine elemental composition and oxidation states.

Surface X-ray Diffraction (SXRD): An in situ method employing grazing‐incidence X-rays to resolve atomic arrangements and strain in thin oxide films and stepped surfaces.

Interfacial Strain: Elastic distortion at the boundary between a substrate and an overlying oxide layer, influencing mass transport and phase stability.

Undercoordinated Site: An atom at a surface defect or step edge with fewer nearest neighbours than in the bulk, often exhibiting enhanced chemical reactivity.

Adsorption–Desorption Dynamics: The reversible process by which molecules attach to and detach from a surface, central to catalysis and surface chemistry studies.

References

1. In situ x-ray study of the oxidation of a vicinal NiAl(6,7,1) surface. New Journal of Physics (2009).
2. Adsorption and Removal Reactions of (CH3)2S on Rh/Al2O3/NiAl(100): Structural and Spectroscopic Study. e-Journal of Surface Science and Nanotechnology (2009).