(Invited) Probing Surface and Bulk States of Cathode Materials with Synchrotron-Based Soft X-Rays in a Functioning Solid Oxide Fuel Cell

Autor:	Kevin F. McCarty, Hendrik Bluhm, Andrey Shavorskiy, Farid El Gabaly, William C. Chueh, Anthony H. McDaniel, Tolek Tyliszczak
Rok vydání:	2013
Předmět:	Materials science business.industry Nanotechnology Synchrotron Cathode law.invention symbols.namesake law Electrode symbols Galvanic cell Optoelectronics Solid oxide fuel cell Nernst equation business Perovskite (structure) Ambient pressure
Zdroj:	ECS Transactions. 58:47-53
ISSN:	1938-6737 1938-5862
Popis:	We discuss the development of a research platform designed to investigate surface and bulk properties of electrocatalysts in an operating solid oxide fuel cell using synchrotron-based soft X-ray spectroscopies. This novel platform realizes a fully functioning galvanic cell capable of supporting a Nernst potential, and incorporates both ambient pressure X-ray photoemission and X-ray absorption spectroscopies. Thus, surface compositions, surface electronic states, and bulk electronic states can be measured while manipulating the electrode environment; i.e., varying the gas composition, pressure, temperature, and cell potential. We will demonstrate the utility of this approach by presenting results of an experimental campaign focused on understanding what gives rise to the enhanced oxygen reduction reaction rates observed on a Ba0.5Sr0.5Co0.8Fe0.2O3 perovskite cathode.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a01755f71a1f57c10962e82d4dd0febf https://doi.org/10.1149/05803.0047ecst Zobrazit plný text záznamu