Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Communication—On the Lack of Correlation between the Voltammetric Redox Couple and ORR Activity of Fe-N-C Catalysts

Journal Article · · Journal of the Electrochemical Society (Online)
Platinum group metal-free catalysts for polymer electrolyte fuel cells are analyzed in different electrolytes (H2SO4 and HClO4) and at different pH values to gain insight into the oxygen reduction reaction (ORR) mechanism. Two Fe-N-C type catalysts showing a reversible voltammetric redox couple around 0.77 V vs RHE in HClO4 electrolyte are investigated. A notable cathodic shift of the redox couple to 0.62 V is observed in H2SO4 and is assigned to bisulfate adsorption. Concurrently, the ORR activity of the catalysts is unaffected, suggesting an independent nature of the reductive mechanism with the redox peak species.
Research Organization:
Savannah River National Lab (SRNL), Aiken, SC (United States); Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Organization:
USDOE Office of Environmental Management (EM)
Grant/Contract Number:
89303321CEM000080
OSTI ID:
1844183
Report Number(s):
SRNL--STI-2019-00542; LDRD-2016-00025
Journal Information:
Journal of the Electrochemical Society (Online), Journal Name: Journal of the Electrochemical Society (Online) Journal Issue: 13 Vol. 167; ISSN 1945-7111
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (41)

Reactivity Descriptors for the Activity of Molecular MN4 Catalysts for the Oxygen Reduction Reaction journal September 2016
Recent Progress of Metal Carbides Encapsulated in Carbon‐Based Materials for Electrocatalysis of Oxygen Reduction Reaction journal November 2019
Influence of anodic oxidation of glassy carbon surface on voltammetric behavior of Nafion®-coated glassy carbon electrodes journal August 2001
On the effect of a heat treatment on the structure of carbon-supported metalloporphyrins and phthalocyanines journal June 1988
Elucidation of Fe-N-C electrocatalyst active site functionality via in-situ X-ray absorption and operando determination of oxygen reduction reaction kinetics in a PEFC journal November 2019
Effect of purification of carbon nanotubes on their electrocatalytic properties for oxygen reduction in acid solution journal October 2011
Cyanamide-derived non-precious metal catalyst for oxygen reduction journal December 2010
The pH-dependence of oxygen reduction on quinone-modified glassy carbon electrodes journal December 2007
Stability of iron species in heat-treated polyaniline–iron–carbon polymer electrolyte fuel cell cathode catalysts journal November 2013
Activity and stability of non-precious metal catalysts for oxygen reduction in acid and alkaline electrolytes journal October 2010
Spectroscopic insights into the nature of active sites in iron–nitrogen–carbon electrocatalysts for oxygen reduction in acid journal November 2016
Directly converting Fe-doped metal–organic frameworks into highly active and stable Fe-N-C catalysts for oxygen reduction in acid journal July 2016
Engineering nanostructures of PGM-free oxygen-reduction catalysts using metal-organic frameworks journal January 2017
Chemistry of Multitudinous Active Sites for Oxygen Reduction Reaction in Transition Metal–Nitrogen–Carbon Electrocatalysts journal November 2015
pH Dependent Redox Couple: An Illustration of the Nernst Equation journal October 1997
Synthesis and characterization of a series of novel rhodium and iridium complexes containing polypyridyl bridging ligands: potential uses in the development of multimetal catalysts for carbon dioxide reduction journal October 1990
Correlations between Mass Activity and Physicochemical Properties of Fe/N/C Catalysts for the ORR in PEM Fuel Cell via 57 Fe Mössbauer Spectroscopy and Other Techniques journal January 2014
Asymmetric Volcano Trend in Oxygen Reduction Activity of Pt and Non-Pt Catalysts: In Situ Identification of the Site-Blocking Effect journal January 2017
Molecular Oxygen Reduction in PEM Fuel Cells:  Evidence for the Simultaneous Presence of Two Active Sites in Fe-Based Catalysts journal August 2002
Oxygen Reduction Catalysts for Polymer Electrolyte Fuel Cells from the Pyrolysis of Iron Acetate Adsorbed on Various Carbon Supports journal February 2003
Catalysts for the Oxygen Reduction from Heat-Treated Iron(III) Tetramethoxyphenylporphyrin Chloride:  Structure and Stability of Active Sites
  • Schulenburg, Hendrik; Stankov, Svetoslav; Schünemann, Volker
  • The Journal of Physical Chemistry B, Vol. 107, Issue 34, p. 9034-9041 https://doi.org/10.1021/jp030349j
journal August 2003
Influence of Nitrogen Doping on Oxygen Reduction Electrocatalysis at Carbon Nanofiber Electrodes journal March 2005
Characterization of the Iron Phase in CN x -Based Oxygen Reduction Reaction Catalysts journal December 2006
RRDE and Voltammetric Study of ORR on Pyrolyzed Fe/Polyaniline Catalyst. On the Origins of Variable Tafel Slopes journal March 2011
Elucidating Oxygen Reduction Active Sites in Pyrolyzed Metal–Nitrogen Coordinated Non-Precious-Metal Electrocatalyst Systems journal April 2014
In situ electrochemical quantification of active sites in Fe–N/C non-precious metal catalysts journal October 2016
Iron-based cathode catalyst with enhanced power density in polymer electrolyte membrane fuel cells journal August 2011
Quantifying the density and utilization of active sites in non-precious metal oxygen electroreduction catalysts journal October 2015
Identification of catalytic sites for oxygen reduction in iron- and nitrogen-doped graphene materials journal August 2015
Ordered mesoporous porphyrinic carbons with very high electrocatalytic activity for the oxygen reduction reaction journal September 2013
Size-controlled large-diameter and few-walled carbon nanotube catalysts for oxygen reduction journal January 2015
Structural and mechanistic basis for the high activity of Fe–N–C catalysts toward oxygen reduction journal January 2016
Chemical effects of steric strains journal January 1956
Highly efficient nonprecious metal catalyst prepared with metal–organic framework in a continuous carbon nanofibrous network journal August 2015
Iron-Based Catalysts with Improved Oxygen Reduction Activity in Polymer Electrolyte Fuel Cells journal April 2009
High-Performance Electrocatalysts for Oxygen Reduction Derived from Polyaniline, Iron, and Cobalt journal April 2011
Direct atomic-level insight into the active sites of a high-performance PGM-free ORR catalyst journal August 2017
Kinetics of Oxygen Reduction on Pt(hkl) Electrodes: Implications for the Crystallite Size Effect with Supported Pt Electrocatalysts journal January 1997
The Solubility and Diffusivity of Oxygen in Electrolytic Solutions journal January 1965
Electrochemical Reduction of Oxygen on Multiwalled Carbon Nanotube Modified Glassy Carbon Electrodes in Acid Media journal January 2007
Bifunctional Oxygen Reduction Reaction Mechanism on Non-Platinum Catalysts Derived from Pyrolyzed Porphyrins journal January 2010

Similar Records

Iron redox behavior and oxygen reduction activity of Fe-N-C electrocatalysts in different electrolytes
Journal Article · Sun Jan 22 19:00:00 EST 2023 · Electrochimica Acta · OSTI ID:1973819