Electrocatalytic Energy Conversion: Probing Catalyst Evolution and System Dynamics

Abstract: Advancing electrochemical energy conversion technologies requires the design of next-generation catalysts, coupled with a fundamental understanding of their dynamic behavior under operating conditions—particularly their activity, durability and pathways of transformation.

In this seminar, I will discuss the material transformations and evolution of a Ni-based 3D MOF during the oxygen evolution reaction (OER) in alkaline medium. I will showcase its transformation into nanostructured electrocatalysts and highlight the role of interfacial dynamics in enhancing activity and stability. Operando studies, including in-situ spectroscopy, will reveal active site evolution and related transformation pathways.

Building on this, the electrocatalytic CO₂ reduction reaction (CO₂RR) using crystalline porous materials will be explored, with a focus on in-situ DRIFTS, Raman and EXAFS techniques to track reaction intermediates, probe catalytic site evolution and evaluate material stability during CO₂ reduction to C₁ and C₂ products. Special emphasis will be placed on the advantages of flow-cell electrolyzers over H-cells in improving current densities, Faradaic efficiencies and product selectivities.

Finally, I will discuss the challenges of scaling CO₂ electrolyzers for industrial applications, emphasizing the role of advanced operando studies in understanding interfacial transformations and ensuring long-term catalytic stability.

Bio: Rohan Jena completed his master’s degree in 2019 from the Indian Institute of Technology Guwahati and qualified for the National Eligibility Test (CSIR Fellowship) to pursue a Ph.D. in Materials Chemistry. He conducted his doctoral research at the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) in Bangalore, India.