Lahiru Pasikku Hannadige

Understanding the Durability of Amorphous Iridium Oxide Catalyst in Proton Exchange Membrane Water Electrolyzers

Obeen Kwon, Hung-Ming Joseph Chang, Juhyun Oh, Lahiru Pasikku Hannadige et autres

Amorphous iridium oxide (A-IrO x ) is a promising anode catalyst for proton exchange membrane water electrolyzers (PEMWEs) due to its superior beginning-of-life (BOL) catalytic activity for oxygen evolution reaction (OER) 1-3 . Nonetheless, its limited long-term durability compared to crystalline iridium …

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( Invited ) In-Situ Raman Microscopy in the Study of Electrode-Supported Thin Film Materials

Carol Korzeniewski, Lahiru Pasikku Hannadige, Kabery Sarker

Confocal Raman microscopy is being applied in the study of electrode-supported materials of interest for electrochemistry (i.e., redox polymers, conjugated organic polymers, catalyst thin films). When measuring within membranes, the confocal probe volume region serves as a fixed volume reservoir for detecting …

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From activity to durability: Structural evolution of amorphous and crystalline iridium oxides in PEM water electrolyzers

Obeen Kwon, Juhyun Oh, Lahiru Pasikku Hannadige, Patrick Yang et autres

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A modular telechelic catechol platform for tunable Fe- and V-coordinated dynamic polymer gels

Ferley Orozco, Amy Hammett, Mahshad Karimi, Thomas Ericson et autres

Dynamic metal–catechol coordination networks provide a powerful platform for bioinspired polymer gels, yet systematic molecular design rules connecting monomer structure to network mechanics and thermal behavior remain limited.

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In-Situ Measurement of Swelling and Oxidation State Change within Electrode-Supported Catalyst and Polymer Films Probed by Raman Microscopy

Lahiru Pasikku Hannadige, Carol Korzeniewski

Confocal Raman microscopy is being adapted to probe chemical structure and composition within catalyst and redox polymer films supported on electrodes. With the confocal probe volume positioned within the electrochemically active material, Raman measurements are sensitive to potential-induced changes in composition (i.e., …

Confocal Raman Microscopy as an In Situ Probe of Volume Change in Hydration-Sensitive Polymer Membranes

Lahiru Pasikku Hannadige, Ahmet Kusoglu, Carol Korzeniewski

An approach is described for measuring hydration-induced volume change within ion conductive polymer membranes and thin films by adapting the technique of confocal Raman microscopy. With careful consideration of factors that affect excitation and scattering within the confocal probe volume region, material …

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