Oxygen Reduction at Carbon Supported Lanthanides: The Role of the B-site

Veronica Celorrio; Ellie Dann; Laura Calvillo; DJ Morgan; Simon R Hall; David J Fermin

doi:10.1002/celc.201500440

Oxygen Reduction at Carbon Supported Lanthanides: The Role of the B-site

Veronica Celorrio, Ellie Dann, Laura Calvillo, DJ Morgan, Simon R Hall, David J Fermin

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Abstract

The kinetics of the oxygen reduction reaction (ORR) at carbon supported transition metal oxides in alkaline solutions is systematically investigated as a function of the nature of the B-site. The study is focused on LaBO₃ (B = Cr, Co, Fe, Mn and Ni) nanoparticles synthesized by an ionic liquid route, offering fine control over phase purity and composition. Activity towards the ORR was compared with commercial Pt/Etek catalyst. Detailed electrochemical analysis employing a rotating ring-disc electrode provides conclusive evidences that the carbon support plays an important contribution in the faradaic responses. Decoupling the contribution of the carbon support uncovers that the reactivity of LaMnO3 towards the 4e- ORR pathway is orders of magnitude higher than for the other lanthanides. We rationalise these observations in terms of changes in the redox state at the B-site close to the formal oxygen reduction potential.

Original language	English
Pages (from-to)	283-291
Number of pages	9
Journal	ChemElectroChem
Volume	3
Issue number	2
Early online date	2 Dec 2015
DOIs	https://doi.org/10.1002/celc.201500440
Publication status	Published - Feb 2016

Keywords

carbon support
electrocatalysis
LaMnO3
oxygen reduction reaction
perovskite nanoparticles

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10.1002/celc.201500440

celc201500440_MS_rev
This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Wiley at http://onlinelibrary.wiley.com/doi/10.1002/celc.201500440/abstract. Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 2.25 MB

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In-situ probing structure and electronic properties of transition metal oxide electrocatalysts
Fermin, D. J. (Principal Investigator)
1/09/15 → 31/08/17
Project: Research
3-month Core Capability for Chemistry Research
Crosby, J. (Principal Investigator)
1/01/13 → 1/04/13
Project: Research

Professor David J Fermin
- David.Ferminbristol.acuk
- School of Chemistry - Professor of Electrochemistry
- Cabot Institute for the Environment
- Materials for Energy
- Soft Matter, Colloids and Materials
Person: Academic , Member

Cite this

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title = "Oxygen Reduction at Carbon Supported Lanthanides: The Role of the B-site",

abstract = "The kinetics of the oxygen reduction reaction (ORR) at carbon supported transition metal oxides in alkaline solutions is systematically investigated as a function of the nature of the B-site. The study is focused on LaBO3 (B = Cr, Co, Fe, Mn and Ni) nanoparticles synthesized by an ionic liquid route, offering fine control over phase purity and composition. Activity towards the ORR was compared with commercial Pt/Etek catalyst. Detailed electrochemical analysis employing a rotating ring-disc electrode provides conclusive evidences that the carbon support plays an important contribution in the faradaic responses. Decoupling the contribution of the carbon support uncovers that the reactivity of LaMnO3 towards the 4e- ORR pathway is orders of magnitude higher than for the other lanthanides. We rationalise these observations in terms of changes in the redox state at the B-site close to the formal oxygen reduction potential.",

keywords = "carbon support, electrocatalysis, LaMnO3, oxygen reduction reaction, perovskite nanoparticles",

author = "Veronica Celorrio and Ellie Dann and Laura Calvillo and DJ Morgan and Hall, {Simon R} and Fermin, {David J}",

year = "2016",

month = feb,

doi = "10.1002/celc.201500440",

language = "English",

volume = "3",

pages = "283--291",

journal = "ChemElectroChem",

issn = "2196-0216",

publisher = "Wiley-VCH Verlag",

number = "2",

}

TY - JOUR

T1 - Oxygen Reduction at Carbon Supported Lanthanides

T2 - The Role of the B-site

AU - Celorrio, Veronica

AU - Dann, Ellie

AU - Calvillo, Laura

AU - Morgan, DJ

AU - Hall, Simon R

AU - Fermin, David J

PY - 2016/2

Y1 - 2016/2

N2 - The kinetics of the oxygen reduction reaction (ORR) at carbon supported transition metal oxides in alkaline solutions is systematically investigated as a function of the nature of the B-site. The study is focused on LaBO3 (B = Cr, Co, Fe, Mn and Ni) nanoparticles synthesized by an ionic liquid route, offering fine control over phase purity and composition. Activity towards the ORR was compared with commercial Pt/Etek catalyst. Detailed electrochemical analysis employing a rotating ring-disc electrode provides conclusive evidences that the carbon support plays an important contribution in the faradaic responses. Decoupling the contribution of the carbon support uncovers that the reactivity of LaMnO3 towards the 4e- ORR pathway is orders of magnitude higher than for the other lanthanides. We rationalise these observations in terms of changes in the redox state at the B-site close to the formal oxygen reduction potential.

AB - The kinetics of the oxygen reduction reaction (ORR) at carbon supported transition metal oxides in alkaline solutions is systematically investigated as a function of the nature of the B-site. The study is focused on LaBO3 (B = Cr, Co, Fe, Mn and Ni) nanoparticles synthesized by an ionic liquid route, offering fine control over phase purity and composition. Activity towards the ORR was compared with commercial Pt/Etek catalyst. Detailed electrochemical analysis employing a rotating ring-disc electrode provides conclusive evidences that the carbon support plays an important contribution in the faradaic responses. Decoupling the contribution of the carbon support uncovers that the reactivity of LaMnO3 towards the 4e- ORR pathway is orders of magnitude higher than for the other lanthanides. We rationalise these observations in terms of changes in the redox state at the B-site close to the formal oxygen reduction potential.

KW - carbon support

KW - electrocatalysis

KW - LaMnO3

KW - oxygen reduction reaction

KW - perovskite nanoparticles

U2 - 10.1002/celc.201500440

DO - 10.1002/celc.201500440

M3 - Article (Academic Journal)

SN - 2196-0216

VL - 3

SP - 283

EP - 291

JO - ChemElectroChem

JF - ChemElectroChem

IS - 2

ER -

Oxygen Reduction at Carbon Supported Lanthanides: The Role of the B-site

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Projects

In-situ probing structure and electronic properties of transition metal oxide electrocatalysts

3-month Core Capability for Chemistry Research

Profiles

Professor David J Fermin

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