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KIC Special Seminar: Joesene Soto Perez

Monday, December 20, 2021 at 12:20pm to 1:20pm

Virtual Event

Title: Identifying Activity-Stability Relationships in Non-Precious-Metal Fuel Cell Catalysts

Abstract: There is a compelling need to develop renewable alternative energy sources and technologies to meet global energy demands/needs while mitigating the deleterious effects of the continued use of fossil fuels. The development of and transition to battery and/or hydrogen powered electric vehicles for ground transportation has been the subject of tremendous effort by governments and industry. Energy technologies such as photovoltaic devices, fuel cells (FCs) and batteries could provide a path for a sustainable energy landscape. Hydrogen FCs have an advantage over batteries by having faster charging/fueling rates, higher energy efficiencies, and a more extended operating range (distance). Nevertheless, driving the electrochemical reactions involved (HOR; hydrogen oxidation reaction and ORR; oxygen reduction reaction) at high rates hinges on using electrocatalysts to lower the attendant overpotentials and promote reaction kinetics. These catalysts (which often involve the use of precious metals) could be improved by replacing or lowering the amount of Pt (and other precious metals) in the materials and operating under alkaline conditions since it could enhance the performance of such catalysts as well as enable the use of non-precious metals. However, stability concerns need to be addressed. There are questions regarding the corrosion—undergoing energy conversion reactions—of non-precious metals, specifically metal oxides and metal nitrides carbides. In order to characterize the electrocatalytic performance and structures of such systems (metal oxides and metal nitrides carbides), we propose using in situ and operando electrochemical X-Ray Absorption (XAS) for ORR and HOR in alkaline media.

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Topic: Joesene Soto Perez KIC Seminar Presentation
Time: Dec 20, 2021 12:20 PM Eastern Time (US and Canada)

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Event Type

Seminar

Departments

LASSP, Materials Science and Engineering, Chemistry and Chemical Biology

University Themes

Research

Tags

physics, lassp

Website

http://kicnano.cornell.edu

Hashtag

#nanoscience

Contact E-Mail

tdm68@cornell.edu

Contact Name

Trisica Munroe

Contact Phone

6072552324

Speaker

Joesene Soto Perez

Speaker Affiliation

University of Puerto Rico

Dept. Web Site

kicnano.cornell.edu

Open To

Cornell community

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