We have developed a microscope with a spatial resolution of 5 µm, which can be used to image the two-dimensional surface optical reflectance (2D-SOR) of polycrystalline samples under operando conditions. In surface science, operando tools that provide real-time information about surface structure or chemistry under realistic experimental settings have proven invaluable for understanding intrinsic reaction mechanisms in thermal catalysis, electrocatalysis, and corrosion science. To study heterogeneous surfaces in situ, an experimental technique must offer both high spatial resolution and the ability to probe through gas or electrolyte environments. Traditional electron-based surface techniques such as low-energy electron microscopy (LEEM) and photoemission electron microscopy (PEEM) are limited by the short mean free path of electrons, making them unsuitable for use under high gas pressure or within an electrolyte.PRKDC Antibody Biological Activity In contrast, 2D-SOR utilizes visible light, enabling its application under high-pressure gas conditions and in liquid electrolytes.SF3B3 Antibody In Vivo This work demonstrates the integration of 2D-SOR with a light microscope to obtain detailed surface information under realistic operating conditions. We apply this method to three polycrystalline materials: palladium during CO oxidation, gold in electrocatalysis, and super duplex stainless steel in corrosion studies. By resolving reflectance changes from individual grains, we show that 2D-SOR provides a powerful, cost-effective approach for monitoring complex surface dynamics across multiple phases and orientations simultaneously.PMID:35005151 This technique offers a significant advantage over conventional single-crystal model systems by capturing the true heterogeneity of industrial materials. The ability to correlate grain-specific reflectance variations with chemical activity—through coupling with mass spectrometry or cyclic voltammetry—enables a deeper understanding of surface reactivity at the microscale. Optical reflectance techniques like 2D-SOR thus emerge as a vital complementary tool in modern operando surface science, particularly for studying polycrystalline systems where surface orientation and local chemistry vary significantly across different regions. With its non-invasive nature, compatibility with harsh environments, and high spatial and temporal resolution, 2D-SOR opens new pathways for investigating dynamic processes in catalysis, electrochemistry, and materials degradation.MedChemExpress (MCE) offers a wide range of high-quality research chemicals and biochemicals (novel life-science reagents, reference compounds and natural compounds) for scientific use. We have professionally experienced and friendly staff to meet your needs. We are a competent and trustworthy partner for your research and scientific projects.Related websites: https://www.medchemexpress.com
