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A Single‐Atom Iridium Heterogeneous Catalyst in Oxygen Reduction Reaction

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [2];  [3];  [3];  [2];  [4];  [5];  [2];  [2];  [6];  [6];  [4];  [7];  [2];  [3];  [2]
  1. College of Chemistry and Materials Engineering, Institute of New Materials and Industrial Technologies Wenzhou University Wenzhou Zhejiang 325035 China, Department of Chemical Engineering University of Waterloo Waterloo Ontario Canada
  2. Department of Chemical Engineering University of Waterloo Waterloo Ontario Canada
  3. Centre for Functional Nanomaterials Brookhaven National Laboratory Upton NY USA
  4. X-Ray Science Division Argonne National Laboratory Lemont IL 60439 USA
  5. Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 P. R. China
  6. College of Chemistry and Materials Engineering, Institute of New Materials and Industrial Technologies Wenzhou University Wenzhou Zhejiang 325035 China
  7. Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 USA

Abstract

Combining the advantages of homogeneous and heterogeneous catalysts, single‐atom catalysts (SACs) are bringing new opportunities to revolutionize ORR catalysis in terms of cost, activity and durability. However, the lack of high‐performance SACs as well as the fundamental understanding of their unique catalytic mechanisms call for serious advances in this field. Herein, for the first time, we develop an Ir‐N‐C single‐atom catalyst (Ir‐SAC) which mimics homogeneous iridium porphyrins for high‐efficiency ORR catalysis. In accordance with theoretical predictions, the as‐developed Ir‐SAC exhibits orders of magnitude higher ORR activity than iridium nanoparticles with a record‐high turnover frequency (TOF) of 24.3 e site −1  s −1 at 0.85 V vs. RHE) and an impressive mass activity of 12.2 A mg −1 Ir , which far outperforms the previously reported SACs and commercial Pt/C. Atomic structural characterizations and density functional theory calculations reveal that the high activity of Ir‐SAC is attributed to the moderate adsorption energy of reaction intermediates on the mononuclear iridium ion coordinated with four nitrogen atom sites.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0012704; AC02-06CH11357
OSTI ID:
1526780
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 28 Vol. 58; ISSN 1433-7851
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (45)

Nitrogen-Coordinated Single Cobalt Atom Catalysts for Oxygen Reduction in Proton Exchange Membrane Fuel Cells journal January 2018
Single-Atom Catalysts: Emerging Multifunctional Materials in Heterogeneous Catalysis journal September 2017
Hierarchically Porous M-N-C (M = Co and Fe) Single-Atom Electrocatalysts with Robust MN x Active Moieties Enable Enhanced ORR Performance journal August 2018
A Highly Durable Platinum Nanocatalyst for Proton Exchange Membrane Fuel Cells: Multiarmed Starlike Nanowire Single Crystal journal November 2010
Single-Atom Catalyst of Platinum Supported on Titanium Nitride for Selective Electrochemical Reactions journal December 2015
Isolated Single Iron Atoms Anchored on N-Doped Porous Carbon as an Efficient Electrocatalyst for the Oxygen Reduction Reaction journal April 2017
Einzelatom-Elektrokatalysatoren journal October 2017
A Highly Durable Platinum Nanocatalyst for Proton Exchange Membrane Fuel Cells: Multiarmed Starlike Nanowire Single Crystal journal November 2010
Single-Atom Catalyst of Platinum Supported on Titanium Nitride for Selective Electrochemical Reactions journal December 2015
Isolated Single Iron Atoms Anchored on N-Doped Porous Carbon as an Efficient Electrocatalyst for the Oxygen Reduction Reaction journal April 2017
Single-Atom Electrocatalysts journal October 2017
Oxygen Reduction on Transition-Metal Porphyrins in Acid Electrolyte I. Activity journal September 1981
Review and analysis of PEM fuel cell design and manufacturing journal February 2003
Single-Atom Catalysts: Synthetic Strategies and Electrochemical Applications journal July 2018
Aging mechanisms and lifetime of PEFC and DMFC journal March 2004
Recent advances in activity and durability enhancement of Pt/C catalytic cathode in PEMFC journal October 2007
Nitrogen and sulfur co-doped porous carbon sheets for energy storage and pH-universal oxygen reduction reaction journal December 2018
Microporous Framework Induced Synthesis of Single-Atom Dispersed Fe-N-C Acidic ORR Catalyst and Its in Situ Reduced Fe-N 4 Active Site Identification Revealed by X-ray Absorption Spectroscopy journal February 2018
Single-Atom Catalysts: A New Frontier in Heterogeneous Catalysis journal April 2013
On an Easy Way To Prepare Metal–Nitrogen Doped Carbon with Exclusive Presence of MeN 4 -type Sites Active for the ORR journal January 2016
Origin of the Overpotential for Oxygen Reduction at a Fuel-Cell Cathode journal November 2004
Mechanisms of the Oxygen Reduction Reaction on Defective Graphene-Supported Pt Nanoparticles from First-Principles journal January 2012
A New Fuel Cell Cathode Catalyst journal March 1964
Single-atom catalysis of CO oxidation using Pt1/FeOx journal July 2011
Iron-based cathode catalyst with enhanced power density in polymer electrolyte membrane fuel cells journal August 2011
Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination journal June 2015
Quantifying the density and utilization of active sites in non-precious metal oxygen electroreduction catalysts journal October 2015
Oxygen reduction reaction: A framework for success journal May 2016
Identification of catalytic sites for oxygen reduction in iron- and nitrogen-doped graphene materials journal August 2015
Heterogeneous single-atom catalysis journal May 2018
A universal principle for a rational design of single-atom electrocatalysts journal April 2018
Bridging homogeneous and heterogeneous catalysis by heterogeneous single-metal-site catalysts journal June 2018
Atomically dispersed manganese catalysts for oxygen reduction in proton-exchange membrane fuel cells journal October 2018
A stable and porous iridium( iii )-porphyrin metal–organic framework: synthesis, structure and catalysis journal January 2016
Structural and mechanistic basis for the high activity of Fe–N–C catalysts toward oxygen reduction journal January 2016
Highly doped and exposed Cu( i )–N active sites within graphene towards efficient oxygen reduction for zinc–air batteries journal January 2016
Highly active atomically dispersed CoN 4 fuel cell cathode catalysts derived from surfactant-assisted MOFs: carbon-shell confinement strategy journal January 2019
Density functional studies of functionalized graphitic materials with late transition metals for oxygen reduction reactions journal January 2011
Structure of the catalytic sites in Fe/N/C-catalysts for O2-reduction in PEM fuel cells journal January 2012
Wavelet analysis of extended x-ray absorption fine structure data journal March 2005
Iron-Based Catalysts with Improved Oxygen Reduction Activity in Polymer Electrolyte Fuel Cells journal April 2009
Just a Dream—or Future Reality? journal April 2009
High-Performance Electrocatalysts for Oxygen Reduction Derived from Polyaniline, Iron, and Cobalt journal April 2011
Oxygen Reduction Characteristics of Heat-Treated Catalysts Based on Cobalt-Porphyrin Ion Complexes journal January 1998
Heat-Treated Iron(III) Tetramethoxyphenyl Porphyrin Supported on High-Area Carbon as an Electrocatalyst for Oxygen Reduction journal January 1998

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