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A novel fuel cell design for operando energy-dispersive X-ray absorption measurements

A novel fuel cell design for operando energy-dispersive X-ray absorption measurements
A novel fuel cell design for operando energy-dispersive X-ray absorption measurements

A polymer electrolyte fuel cell has been designed to allow operando x-ray absorption spectroscopy (XAS) measurements of catalysts. The cell has been developed to operate under standard fuel cell conditions, with elevated temperatures and humidification of the gas-phase reactants, both of which greatly impact the catalyst utilisation. X-ray windows in the endplates of the cell facilitate collection of XAS spectra during fuel cell operation while maintaining good compression in the area of measurement. Results of polarisation curves and cyclic voltammograms showed that the operando cell performs well as a fuel cell, while also providing XAS data of suitable quality for robust XANES analysis. The cell has produced comparable XAS results when performing a cyclic voltammogram to an established in situ cell when measuring the Pt LIII edge. Similar trends of Pt oxidation, and reduction of the formed Pt oxide, have been presented with a time resolution of 5 s for each spectrum, paving the way for time-resolved spectral measurements of fuel cell catalysts in a fully-operating fuel cell.

XANES, XAS, catalysis, fuel cell, operando, platinum, polymer electrolyte fuel cell (PEFC)
0953-8984
Leach, Andrew Stephen
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Hack, J
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Amboage, Monica
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Diaz-Moreno, Sofia
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Huang, Haoliang
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Cullen, P.L.
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Wilding, M.
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Magliocca, E.
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Miller, Thomas S
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Howard, C.A.
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Brett, D.J.L.
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Shearing, P.R.
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McMillan, P.F.
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Russell, Andrea E.
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Jervis, Rhodri
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Leach, Andrew Stephen
eb2fee87-ab58-4a28-9319-529de90d1708
Hack, J
f9c130cb-645a-4f7d-a34e-9d5fd0ea815c
Amboage, Monica
f1f91840-c149-4732-b396-0c20e11aaeb6
Diaz-Moreno, Sofia
4e280df3-7f62-4280-8058-2803c740ae00
Huang, Haoliang
132a8eda-b800-4fa7-9583-6b4306f30247
Cullen, P.L.
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Wilding, M.
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Magliocca, E.
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Miller, Thomas S
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Howard, C.A.
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Brett, D.J.L.
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Shearing, P.R.
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McMillan, P.F.
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Russell, Andrea E.
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Jervis, Rhodri
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Leach, Andrew Stephen, Hack, J, Amboage, Monica, Diaz-Moreno, Sofia, Huang, Haoliang, Cullen, P.L., Wilding, M., Magliocca, E., Miller, Thomas S, Howard, C.A., Brett, D.J.L., Shearing, P.R., McMillan, P.F., Russell, Andrea E. and Jervis, Rhodri (2021) A novel fuel cell design for operando energy-dispersive X-ray absorption measurements. Journal of Physics: Condensed Matter, 33 (31), [314002]. (doi:10.1088/1361-648X/ac0476).

Record type: Article

Abstract

A polymer electrolyte fuel cell has been designed to allow operando x-ray absorption spectroscopy (XAS) measurements of catalysts. The cell has been developed to operate under standard fuel cell conditions, with elevated temperatures and humidification of the gas-phase reactants, both of which greatly impact the catalyst utilisation. X-ray windows in the endplates of the cell facilitate collection of XAS spectra during fuel cell operation while maintaining good compression in the area of measurement. Results of polarisation curves and cyclic voltammograms showed that the operando cell performs well as a fuel cell, while also providing XAS data of suitable quality for robust XANES analysis. The cell has produced comparable XAS results when performing a cyclic voltammogram to an established in situ cell when measuring the Pt LIII edge. Similar trends of Pt oxidation, and reduction of the formed Pt oxide, have been presented with a time resolution of 5 s for each spectrum, paving the way for time-resolved spectral measurements of fuel cell catalysts in a fully-operating fuel cell.

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JPCM-118060 R2 - Accepted Manuscript
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Accepted/In Press date: 18 May 2021
e-pub ahead of print date: 24 May 2021
Published date: 4 August 2021
Additional Information: Publisher Copyright: © 2021 The Author(s). Published by IOP Publishing Ltd.
Keywords: XANES, XAS, catalysis, fuel cell, operando, platinum, polymer electrolyte fuel cell (PEFC)

Identifiers

Local EPrints ID: 449403
URI: http://eprints.soton.ac.uk/id/eprint/449403
ISSN: 0953-8984
PURE UUID: 007e4016-f12c-4a28-ad02-65c0b5673a06
ORCID for Andrea E. Russell: ORCID iD orcid.org/0000-0002-8382-6443

Catalogue record

Date deposited: 27 May 2021 16:31
Last modified: 21 Jun 2022 01:34

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Contributors

Author: Andrew Stephen Leach
Author: J Hack
Author: Monica Amboage
Author: Sofia Diaz-Moreno
Author: Haoliang Huang
Author: P.L. Cullen
Author: M. Wilding
Author: E. Magliocca
Author: Thomas S Miller
Author: C.A. Howard
Author: D.J.L. Brett
Author: P.R. Shearing
Author: P.F. McMillan
Author: Rhodri Jervis

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