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Title: 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:
 [1];  [1]; ORCiD logo [2]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), 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:
Journal Article: 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. 2016. "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},
url = {https://www.osti.gov/biblio/1349289}, journal = {ACS Energy Letters},
issn = {2380-8195},
number = 1,
volume = 2,
place = {United States},
year = {Wed Dec 28 00:00:00 EST 2016},
month = {Wed Dec 28 00:00:00 EST 2016}
}

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Cited by: 56 works
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Works referenced in this record:

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  • Stephens, Ifan E. L.; Bondarenko, Alexander S.; Perez-Alonso, Francisco J.
  • Journal of the American Chemical Society, Vol. 133, Issue 14
  • https://doi.org/10.1021/ja111690g

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journal, August 2010


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Works referencing / citing this record:

Noble metal supported hexagonal boron nitride for the oxygen reduction reaction: a DFT study
journal, January 2019


Fabrication of Superior Single‐Atom Catalysts toward Diverse Electrochemical Reactions
journal, February 2019


A review of Pt-based electrocatalysts for oxygen reduction reaction
journal, May 2017


Single Metal Atoms Anchored in Two-Dimensional Materials: Bifunctional Catalysts for Fuel Cell Applications
journal, May 2018


A Comprehensive Review on Controlling Surface Composition of Pt-Based Bimetallic Electrocatalysts
journal, April 2018


Pt-loaded Au@CeO 2 core–shell nanocatalysts for improving methanol oxidation reaction activity
journal, January 2019


Engineering Ru@Pt Core-Shell Catalysts for Enhanced Electrochemical Oxygen Reduction Mass Activity and Stability
journal, January 2018


Hollow nanoparticles as emerging electrocatalysts for renewable energy conversion reactions
journal, January 2018


Ordered platinum–bismuth intermetallic clusters with Pt-skin for a highly efficient electrochemical ethanol oxidation reaction
journal, January 2019


Engineering stable electrocatalysts by synergistic stabilization between carbide cores and Pt shells
journal, December 2019


Engineering Ru@Pt Core-Shell Catalysts for Enhanced Electrochemical Oxygen Reduction Mass Activity and Stability
journal, January 2018