3D Nanowire Pt Catalysts with Enhanced Stability for the Oxygen Reduction Reaction

Joshua S. White; Wanli Liu; Samuel C. Perry; Samina Akbar; Diego Alba-Venero; Nicholas J. Terrill; Adam Squires; Iris Nandhakumar

doi:10.1021/acsomega.4c06385

3D Nanowire Pt Catalysts with Enhanced Stability for the Oxygen Reduction Reaction

Joshua S. White, Wanli Liu, Samuel C. Perry, Samina Akbar, Diego Alba-Venero, Nicholas J. Terrill, Adam Squires, Iris Nandhakumar

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

Abstract

We report that self-supporting mesoporous platinum 3D nanowires with a single diamond (SD) morphology and a high specific surface area of 40.4 m² g^-1 demonstrated enhanced stability toward the oxygen reduction reaction (ORR). These were found to be superior to commercially available carbon-supported Pt nanoparticles (Pt/C). After 1000 potential cycles, there was a 21% loss in surface area for SD-Pt, as compared with a 40.3% loss for Pt/C with no reduction in their half-wave potential (measured at J = 3.0 mA cm^-2), whereas the Pt/C catalyst showed a 11.9 mV decrease. Our findings revealed that our SD-Pt thin films also exhibited excellent ORR activity, which offers significant potential for their application as high-performance cathode materials in alkaline fuel cells.

Original language	English
Pages (from-to)	8082-8088
Journal	ACS OMEGA
Volume	10
Issue number	8
Early online date	21 Feb 2025
DOIs	https://doi.org/10.1021/acsomega.4c06385
Publication status	Published - 4 Mar 2025

Acknowledgements

The authors would like to thank Diamond Light Source for beamtime (NT33748, NT35376, NT35348) and the staff of beamline I22 for assistance with data collection.

Funding

J.W. would like to acknowledge Diamond Light Source and ISIS for co-sponsoring a PhD studentship.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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10.1021/acsomega.4c06385Licence: CC BY

Cite this

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abstract = "We report that self-supporting mesoporous platinum 3D nanowires with a single diamond (SD) morphology and a high specific surface area of 40.4 m2 g-1 demonstrated enhanced stability toward the oxygen reduction reaction (ORR). These were found to be superior to commercially available carbon-supported Pt nanoparticles (Pt/C). After 1000 potential cycles, there was a 21% loss in surface area for SD-Pt, as compared with a 40.3% loss for Pt/C with no reduction in their half-wave potential (measured at J = 3.0 mA cm-2), whereas the Pt/C catalyst showed a 11.9 mV decrease. Our findings revealed that our SD-Pt thin films also exhibited excellent ORR activity, which offers significant potential for their application as high-performance cathode materials in alkaline fuel cells.",

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AU - Alba-Venero, Diego

AU - Terrill, Nicholas J.

AU - Squires, Adam

AU - Nandhakumar, Iris

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3D Nanowire Pt Catalysts with Enhanced Stability for the Oxygen Reduction Reaction

Abstract

Acknowledgements

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