Speaker Bio and Abstract

Speaker

Pradeep Guduru

Pradeep R. Guduru
School of Engineering
Brown University

Seminar Title

“On the influence of elastic strain on catalytic activity of metal surfaces"

Abstract

Chemo-mechanical coupling, i.e., interaction between mechanical fields (stress, strain, …) and chemical phenomena is familiar in a number of problems in mechanics of materials. Examples include stress corrosion cracking, dislocation interaction with its local environment, the role of stress in microstructure evolution in certain alloys, etc. The basic idea is that the contribution of mechanical fields to the free energy and the chemical potential of certain species can tip the energy landscape to influence the chemical reaction rates in ways that may have practical implications. In this talk, we present investigations of chemo-mechanical interactions in the context of heterogeneous catalysis. We examine how externally applied stress fields on a catalyst can influence the catalytic efficiency in the context of oxygen reduction reaction (ORR) and the hydrogen evolution reaction (HER). By isolating elastic strain from the electronic structure effects, this study provides a better understanding of the processes that control electrocatalytic activity and can guide the design of strained core-shell nano-particle catalysts.

Speaker Bio

Profeesor Guduru received his Ph.D. in Aeronautics (Minor: Materials Science) from California Institute of Technology in 2001. Following a postdoctoral position in the Division of Engineering at Brown University, he joined the Solid Mechanics faculty there as an Assistant Professor of Engineering in 2002. He is currently a Professor of Engineering at Brown University. Prof. Guduru’s research focuses on experimental mechanics; current problems of interest are at the interface between mechanics and chemistry and impact dynamics of materials. Professor Guduru was a recipient of PECASE - Presidential Early Career Award for Scientists and Engineers – in 2007; and the National Science Foundation CAREER award in 2006. Prof. Guduru serves on the Editorial Advisory Boards of the Journal of the Mechanics and Physics of Solids and Acta Mechanica Sinica. He is an Associate Editor of Applied Mechanics Reviews.

Back to Graduate Seminars Schedule

 
 

About

The Penn State Department of Engineering Science and Mechanics (ESM) is an internationally distinguished department that is recognized for its globally competitive excellence in engineering and scientific accomplishments, research, and educational leadership.

Our Engineering Science program is the official undergraduate honors program of the College of Engineering, attracting the University’s brightest engineering students. We also offer graduate degrees in ESM, engineering mechanics, engineering at the nano-scale, and an integrated undergraduate/graduate program.

Department of Engineering Science and Mechanics

212 Earth and Engineering Sciences Building

The Pennsylvania State University

University Park, PA 16802

Phone: 814-865-4523