Active and stable Ir@Pt core–shell catalysts for electrochemical oxygen reduction
Abstract
Electrochemical oxygen reduction is an important reaction for many sustainable energy technologies, such as fuel cells and metal–air batteries. Kinetic limitations of this reaction, expensive electrocatalysts, and catalyst instability, however, limit the commercial viability of such devices. Herein, we report an active Ir@Pt core–shell catalyst that combines platinum overlayers with nanostructure effects to tune the oxygen binding to the Pt surface, thereby achieving enhanced activity and stability for the oxygen reduction reaction. Ir@Pt nanoparticles with several shell thicknesses were synthesized in a scalable, inexpensive, one-pot polyol method. Electrochemical analysis demonstrates the activity and stability of the Ir@Pt catalyst, with specific and mass activities increasing to 2.6 and 1.8 times that of commercial Pt/C (TKK), respectively, after 10 000 stability cycles. Furthermore, activity enhancement of the Ir@Pt catalyst is attributed to weakening of the oxygen binding to the Pt surface induced by the Ir core.
- Authors:
-
- Stanford Univ., Stanford, CA (United States)
- Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1349289
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Energy Letters
- Additional Journal Information:
- Journal Volume: 2; Journal Issue: 1; Journal ID: ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
Citation Formats
Strickler, Alaina L., Jackson, Ariel, and Jaramillo, Thomas F. Active and stable Ir@Pt core–shell catalysts for electrochemical oxygen reduction. United States: N. p., 2016.
Web. doi:10.1021/acsenergylett.6b00585.
Strickler, Alaina L., Jackson, Ariel, & Jaramillo, Thomas F. Active and stable Ir@Pt core–shell catalysts for electrochemical oxygen reduction. United States. https://doi.org/10.1021/acsenergylett.6b00585
Strickler, Alaina L., Jackson, Ariel, and Jaramillo, Thomas F. Wed .
"Active and stable Ir@Pt core–shell catalysts for electrochemical oxygen reduction". United States. https://doi.org/10.1021/acsenergylett.6b00585. https://www.osti.gov/servlets/purl/1349289.
@article{osti_1349289,
title = {Active and stable Ir@Pt core–shell catalysts for electrochemical oxygen reduction},
author = {Strickler, Alaina L. and Jackson, Ariel and Jaramillo, Thomas F.},
abstractNote = {Electrochemical oxygen reduction is an important reaction for many sustainable energy technologies, such as fuel cells and metal–air batteries. Kinetic limitations of this reaction, expensive electrocatalysts, and catalyst instability, however, limit the commercial viability of such devices. Herein, we report an active Ir@Pt core–shell catalyst that combines platinum overlayers with nanostructure effects to tune the oxygen binding to the Pt surface, thereby achieving enhanced activity and stability for the oxygen reduction reaction. Ir@Pt nanoparticles with several shell thicknesses were synthesized in a scalable, inexpensive, one-pot polyol method. Electrochemical analysis demonstrates the activity and stability of the Ir@Pt catalyst, with specific and mass activities increasing to 2.6 and 1.8 times that of commercial Pt/C (TKK), respectively, after 10 000 stability cycles. Furthermore, activity enhancement of the Ir@Pt catalyst is attributed to weakening of the oxygen binding to the Pt surface induced by the Ir core.},
doi = {10.1021/acsenergylett.6b00585},
journal = {ACS Energy Letters},
number = 1,
volume = 2,
place = {United States},
year = {2016},
month = {12}
}
Web of Science
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