journal article·2013-05-28

Spatially Resolved Mapping of Oxygen Reduction/Evolution Reaction on Solid-Oxide Fuel Cell Cathodes with Sub-10 nm Resolution

Amit Kumar, Donovan Leonard, Stephen Jesse, Francesco Ciucci, Eugene A. Eliseev, Anna N. Morozovska, Michael D. Biegalski, Hans M. Christen, Alexander Tselev, Eva Mutoro, Ethan J. Crumlin, Dane Morgan, Yang Shao-Horn, Albina Borisevich, Sergei V. Kalinin

ACS Nano· Volume 7· Issue 5
Publisher page

Abstract

Spatial localization of the oxygen reduction/evolution reactions on lanthanum strontium cobaltite (LSCO) surfaces with perovskite and layered perovskite structures is studied at the sub-10 nm level. Comparison between electrochemical strain microscopy (ESM) and structural imaging by scanning transmission electron microscopy (STEM) suggests that small-angle grain boundaries act as regions with enhanced electrochemical activity. The ESM activity is compared across a family of LSCO samples, demonstrating excellent agreement with macroscopic behaviors. This study potentially paves the way for deciphering the mechanisms of electrochemical activity of solids on the level of single extended structural defects such as grain boundaries and dislocations.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Electronic and Structural Properties of Oxides · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, United States

Department of Mechanical Engineering and Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 00852, People’s Republic of China

Institute for Problems of Materials Science, National Academy of Science of Ukraine, 3, Krjijanovskogo Street, Kiev, Ukraine 03412

Institute of Semiconductor Physics, National Academy of Science of Ukraine, 41, Pr. Nauki, Kiev, Ukraine 03028

Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States

Department of Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States

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