Accelerating Oxygen-Reduction Catalysts through Preventing Poisoning with Non-Reactive Species by Using Hydrophobic Ionic Liquids

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Zhang G, Munoz M, Etzold B
Zeitschrift: Angewandte Chemie International Edition
Jahr der Veröffentlichung: 2016
Band: 55
Heftnummer: 6
Seitenbereich: 2257-2261
ISSN: 1433-7851
eISSN: 1521-3773


Abstract

Developing cost-effective electrocatalysts for the oxygen reduction reaction (ORR) is a prerequisite for broad market penetration of low-temperature fuel cells. A major barrier stems from the poisoning of surface sites by nonreactive oxygenated species and the sluggish ORR kinetics on the Pt catalysts. Herein we report a facile approach to accelerating ORR kinetics by using a hydrophobic ionic liquid (IL), which protects Pt sites from surface oxidation, making the IL-modified Pt intrinsically more active than its unmodified counterpart. The mass activity of the catalyst is increased by three times to 1.01 A mg-1Pt@0.9 V, representing a new record for pure Pt catalysts. The enhanced performance of the IL-modified catalyst can be stabilized after 30 000 cycles. We anticipate these results will form the basis for an unprecedented perspective in the development of high-performing electrocatalysts for fuel-cell applications.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

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


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Forschungsbereiche

D Catalytic Materials
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Zhang, G., Munoz, M., & Etzold, B. (2016). Accelerating Oxygen-Reduction Catalysts through Preventing Poisoning with Non-Reactive Species by Using Hydrophobic Ionic Liquids. Angewandte Chemie International Edition, 55(6), 2257-2261. https://dx.doi.org/10.1002/anie.201508338

MLA:
Zhang, Guirong, Macarena Munoz, and Bastian Etzold. "Accelerating Oxygen-Reduction Catalysts through Preventing Poisoning with Non-Reactive Species by Using Hydrophobic Ionic Liquids." Angewandte Chemie International Edition 55.6 (2016): 2257-2261.

BibTeX: 

Zuletzt aktualisiert 2019-15-03 um 08:53