Boosting performance of low temperature fuel cell catalysts by subtle ionic liquid modification

Journal article


Publication Details

Author(s): Zhang G, Munoz Garcia M, Etzold B
Journal: ACS Applied Materials and Interfaces
Publication year: 2015
Volume: 7
Journal issue: 6
Pages range: 3562-3570
ISSN: 1944-8244
eISSN: 1944-8252


Abstract

High cost and poor stability of the oxygen reduction reaction (ORR) electrocatalysts are the major barriers for broad-based application of polymer electrolyte membrane fuel cells. Here we report a facile and scalable approach to improve Pt/C catalysts for ORR, by modification with small amounts of hydrophobic ionic liquid (IL). The ORR performance of these IL-modified catalysts can be readily manipulated by varying the degree of IL filling, leading to a 3.4 times increase in activity. Besides, the IL-modified catalysts exhibit substantially enhanced stability relative to Pt/C. The enhanced performance is attributed to the optimized microenvironment at the interface of Pt and electrolyte, where advantages stemming from an increased number of free sites, higher oxygen concentration in the IL and electrostatic stabilization of the nanoparticles develop fully, at the same time that the drawback of mass transfer limitation remains suppressed. These findings open a new avenue for catalyst optimization for next-generation fuel cells.


FAU Authors / FAU Editors

Etzold, Bastian Prof. Dr.
Professur für Katalytische Materialien
Munoz Garcia, Macarena Dr.
Professur für Katalytische Materialien
Zhang, Guirong, Ph.D.
Professur für Katalytische Materialien


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Zhang, G., Munoz Garcia, M., & Etzold, B. (2015). Boosting performance of low temperature fuel cell catalysts by subtle ionic liquid modification. ACS Applied Materials and Interfaces, 7(6), 3562-3570. https://dx.doi.org/10.1021/am5074003

MLA:
Zhang, Guirong, Macarena Munoz Garcia, and Bastian Etzold. "Boosting performance of low temperature fuel cell catalysts by subtle ionic liquid modification." ACS Applied Materials and Interfaces 7.6 (2015): 3562-3570.

BibTeX: 

Last updated on 2019-15-05 at 10:34