Cobalt-Doped Ceria/Reduced Graphene Oxide Nanocomposite as an Efficient Oxygen Reduction Reaction Catalyst and Supercapacitor Material

Design and development of highly active and durable oxygen reduction reaction (ORR) catalyst to replace Pt- and Pt-based materials are the present challenges in fuel cell research including direct methanol fuel cells (DMFC). The methanol crossover and oxidation at cathode is another unwanted issue that reduces the efficiency of DMFC. Herein we report cobalt-doped ceria (Co-CeO2) as a promising electrocatalyst with competent ORR kinetics mainly through a four electron reduction pathway and it surpasses Pt/C by a great margin in terms of stability and methanol tolerance. The Co-CeO2 nanoparticles of diameter 4-7 nm were uniformly grown on reduced graphene oxide (rGO) by a facile single-step hydrothermal process. The as-synthesized Co-CeO2nanoparticles/rGO nanocomposites are further demonstrated as an active energy storage material in supercapacitor underlying the importance of the studied material in renewable energy industries.

http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.7b06846

Views: 122

Comment

You need to be a member of The International NanoScience Community to add comments!

Join The International NanoScience Community

Welcome - about us

Welcome! Nanopaprika was cooked up by Hungarian chemistry PhD student in 2007. The main idea was to create something more personal than the other nano networks already on the Internet. Community is open to everyone from post-doctorial researchers and professors to students everywhere.

There is only one important assumption: you have to be interested in nano!

Nanopaprika is always looking for new partners, if you have any idea, contact me at editor@nanopaprika.eu

Dr. András Paszternák, founder of Nanopaprika

Partner network:

Next partner events of TINC

We are Media Partner of:

© 2017   Created by András Paszternák, PhD (founder).   Powered by

Badges  |  Report an Issue  |  Terms of Service