A new approach to fuel cell electrodes: lanthanum aluminate yielding fine Pt nanoparticle exsolution for oxygen reduction reaction

Selda Ozkan; Seo Jin Kim; David N. Miller; John T. S. Irvine

doi:10.1002/aenm.202303025

A new approach to fuel cell electrodes: lanthanum aluminate yielding fine Pt nanoparticle exsolution for oxygen reduction reaction

Selda Ozkan, Seo Jin Kim, David N. Miller, John T. S. Irvine^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

Designing an electrocatalyst with low Pt content is an immediate need for essential reactions in low temperature fuel cell systems. In the present work, La_0.9925Ba_0.0075Al_0.995Pt_0.005O₃ is aimed at using with low (only 0.5%) Pt doping as an electrocatalyst for oxygen reduction reaction (ORR). The low doping level renders exsolution of 1–2 nm nanoparticles with uniform dispersion upon reduction in H₂/N₂ at low temperatures. Pt exsolved perovskite oxides deliver significantly enhanced catalytic activity for ORR and improved stability in alkaline media. This study demonstrates that LaAlO3 with low noble metal content holds immense potential as an electrocatalyst in real fuel cell systems.

Original language	English
Journal	Advanced Energy Materials
Volume	Early View
Early online date	13 Feb 2024
DOIs	https://doi.org/10.1002/aenm.202303025
Publication status	E-pub ahead of print - 13 Feb 2024

Keywords

Alkaline fuel cells
Electrocatalyst
LaAIO3
Oxygen reduction reaction
ORR
Perovskite oxides
Pt exsolution

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10.1002/aenm.202303025Licence: CC BY

Ozkan-2024-A-new-approach-to-fuel-cell-AdvEnergyMat-202303025-CCBY
Copyright © 2024 The Authors. Advanced Energy Materials published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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3 Finished

UK-HyRES: Hub for Research: UK-HyRES: Hub for Research Challenges in Hydrogen and Alternative Liquid Fuels
Irvine, J. T. S. (PI)
EPSRC
1/06/23 → 31/05/28
Project: Standard
Light Element Analysis Facility (LEAF): Light Element Analysis Facility (LEAF)
Irvine, J. T. S. (PI), Baker, R. (CoI) & Miller, D. N. (CoI)
EPSRC
5/04/20 → 4/04/23
Project: Standard
Critical Mass: Emergrent Nanomaterials (Critcal Mass Proposal)
Irvine, J. T. S. (PI), Connor, P. A. (CoI) & Savaniu, C. D. (CoI)
1/06/18 → 31/01/23
Project: Standard

A New Approach to Fuel Cell Electrodes: Lanthanum Aluminate Yielding Fine Pt Nanoparticle Exsolution for Oxygen Reduction Reaction (dataset)
Ozkan, S. (Creator), Kim, S. J. (Creator), Miller, D. N. (Creator) & Irvine, J. T. S. (Creator), University of St Andrews, 18 Feb 2024
DOI: 10.17630/c4f400d7-57b7-4dff-bad8-9c54943c5b3c
Dataset

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Cite this

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title = "A new approach to fuel cell electrodes: lanthanum aluminate yielding fine Pt nanoparticle exsolution for oxygen reduction reaction",

abstract = "Designing an electrocatalyst with low Pt content is an immediate need for essential reactions in low temperature fuel cell systems. In the present work, La0.9925Ba0.0075Al0.995Pt0.005O3 is aimed at using with low (only 0.5%) Pt doping as an electrocatalyst for oxygen reduction reaction (ORR). The low doping level renders exsolution of 1–2 nm nanoparticles with uniform dispersion upon reduction in H2/N2 at low temperatures. Pt exsolved perovskite oxides deliver significantly enhanced catalytic activity for ORR and improved stability in alkaline media. This study demonstrates that LaAlO3 with low noble metal content holds immense potential as an electrocatalyst in real fuel cell systems.",

keywords = "Alkaline fuel cells, Electrocatalyst, LaAIO3, Oxygen reduction reaction, ORR, Perovskite oxides, Pt exsolution",

author = "Selda Ozkan and Kim, {Seo Jin} and Miller, {David N.} and Irvine, {John T. S.}",

note = "We acknowledge support from the Engineering and Physical Sciences Research Council (EPSRC) Critical Mass Grant EP/R023522/1, EPSRC Light element Analysis Facility Grant EP/T019298/1 and the EPRC Strategic Equipment Resource grant EP/R023751/1.",

year = "2024",

month = feb,

day = "13",

doi = "10.1002/aenm.202303025",

language = "English",

volume = "Early View",

journal = "Advanced Energy Materials",

issn = "1614-6840",

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T1 - A new approach to fuel cell electrodes

T2 - lanthanum aluminate yielding fine Pt nanoparticle exsolution for oxygen reduction reaction

AU - Ozkan, Selda

AU - Kim, Seo Jin

AU - Miller, David N.

AU - Irvine, John T. S.

N1 - We acknowledge support from the Engineering and Physical Sciences Research Council (EPSRC) Critical Mass Grant EP/R023522/1, EPSRC Light element Analysis Facility Grant EP/T019298/1 and the EPRC Strategic Equipment Resource grant EP/R023751/1.

PY - 2024/2/13

Y1 - 2024/2/13

N2 - Designing an electrocatalyst with low Pt content is an immediate need for essential reactions in low temperature fuel cell systems. In the present work, La0.9925Ba0.0075Al0.995Pt0.005O3 is aimed at using with low (only 0.5%) Pt doping as an electrocatalyst for oxygen reduction reaction (ORR). The low doping level renders exsolution of 1–2 nm nanoparticles with uniform dispersion upon reduction in H2/N2 at low temperatures. Pt exsolved perovskite oxides deliver significantly enhanced catalytic activity for ORR and improved stability in alkaline media. This study demonstrates that LaAlO3 with low noble metal content holds immense potential as an electrocatalyst in real fuel cell systems.

AB - Designing an electrocatalyst with low Pt content is an immediate need for essential reactions in low temperature fuel cell systems. In the present work, La0.9925Ba0.0075Al0.995Pt0.005O3 is aimed at using with low (only 0.5%) Pt doping as an electrocatalyst for oxygen reduction reaction (ORR). The low doping level renders exsolution of 1–2 nm nanoparticles with uniform dispersion upon reduction in H2/N2 at low temperatures. Pt exsolved perovskite oxides deliver significantly enhanced catalytic activity for ORR and improved stability in alkaline media. This study demonstrates that LaAlO3 with low noble metal content holds immense potential as an electrocatalyst in real fuel cell systems.

KW - Alkaline fuel cells

KW - Electrocatalyst

KW - LaAIO3

KW - Oxygen reduction reaction

KW - ORR

KW - Perovskite oxides

KW - Pt exsolution

U2 - 10.1002/aenm.202303025

DO - 10.1002/aenm.202303025

M3 - Article

SN - 1614-6840

VL - Early View

JO - Advanced Energy Materials

JF - Advanced Energy Materials

ER -

A new approach to fuel cell electrodes: lanthanum aluminate yielding fine Pt nanoparticle exsolution for oxygen reduction reaction

Abstract

Keywords

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Projects

UK-HyRES: Hub for Research: UK-HyRES: Hub for Research Challenges in Hydrogen and Alternative Liquid Fuels

Light Element Analysis Facility (LEAF): Light Element Analysis Facility (LEAF)

Critical Mass: Emergrent Nanomaterials (Critcal Mass Proposal)

Datasets

A New Approach to Fuel Cell Electrodes: Lanthanum Aluminate Yielding Fine Pt Nanoparticle Exsolution for Oxygen Reduction Reaction (dataset)

Cite this