Dr MATTHEW WADGE Matthew.Wadge3@nottingham.ac.uk
Research Fellow
Dr MATTHEW WADGE Matthew.Wadge3@nottingham.ac.uk
Research Fellow
Matthew A. Bird
Andrzej Sankowski
Hannah Constantin
Dr MICHAEL FAY MICHAEL.FAY@NOTTINGHAM.AC.UK
Senior Research Fellow
Timothy P. Cooper
JAMES O'SHEA J.OSHEA@NOTTINGHAM.AC.UK
Associate Professor and Reader in Physics
ANDREI KHLOBYSTOV ANDREI.KHLOBYSTOV@NOTTINGHAM.AC.UK
Professor of Chemical Nanoscience
DARREN WALSH DARREN.WALSH@NOTTINGHAM.AC.UK
Professor of Chemistry
LEE JOHNSON LEE.JOHNSON@NOTTINGHAM.AC.UK
Associate Professor of Chemistry
Reda M. Felfel
Associate Professor IFTY AHMED ifty.ahmed@nottingham.ac.uk
Associate Professor
DAVID GRANT DAVID.GRANT@NOTTINGHAM.AC.UK
Professor of Materials Science
This study describes the chemical conversion and heat treatment of Ti6Al4V microspheres (Ti6_MS), and the resulting effects on their electrocatalytic properties. The wet-chemical conversion (5.0m NaOH, 60°C, 24h; Sample label: Ti6_TC) converts the top surface of the Ti6_MS powder into an ≈820nm thick sodium titanate surface. Heat-treatment (Ti6_TC_HT) at 450°C increases the stability of the surface, through partial titanate crystallization, while mitigating excess rutile formation. All samples are analyzed chemically (XPS, EDX, Raman, EELS), structurally (XRD and TEM), and morphologically (SEM, TEM), demonstrating the characteristic formation of sodium titanate dendritic structures, with minimal chemical, structural, and morphological differences due to the 450°C heat-treatment. The effect of the preparation methodology on oxygen reduction reaction (ORR) electrocatalytic performance is also tested. The introduction of the sodium titanate layer changes the mechanism of the ORR, from a mixed 4 electron/2 electron pathway to a predominantly 2-electron pathway. By maintaining the microspherical nature of the material while also tuning the surface of the material toward different reaction mechanisms, a design strategy for new electrocatalyst materials is explored.
Wadge, M. D., Bird, M. A., Sankowski, A., Constantin, H., Fay, M. W., Cooper, T. P., …Grant, D. M. (2023). Nanostructured, Alkaline Titanate‐Converted, and Heat‐Treated Ti6Al4V Microspheres via Wet‐Chemical Alkaline Modification and their ORR Electrocatalytic Response. Advanced Materials Interfaces, 10(5), Article 2201523. https://doi.org/10.1002/admi.202201523
Journal Article Type | Article |
---|---|
Acceptance Date | Dec 2, 2022 |
Online Publication Date | Dec 2, 2022 |
Publication Date | Feb 14, 2023 |
Deposit Date | Feb 17, 2023 |
Publicly Available Date | Feb 17, 2023 |
Journal | Advanced Materials Interfaces |
Electronic ISSN | 2196-7350 |
Publisher | Wiley |
Peer Reviewed | Peer Reviewed |
Volume | 10 |
Issue | 5 |
Article Number | 2201523 |
DOI | https://doi.org/10.1002/admi.202201523 |
Keywords | Alkaline ORR, alkaline titanate, nanoporous surfaces, Ti6Al4V microspheres, wet‐chemical conversion |
Public URL | https://nottingham-repository.worktribe.com/output/14587805 |
Publisher URL | https://onlinelibrary.wiley.com/doi/10.1002/admi.202201523 |
Additional Information | Received: 2022-07-11; Published: 2022-12-02 |
Adv Materials Inter - 2022 - Wadge - Nanostructured Alkaline Titanate ? Converted And Heat ? Treated Ti6Al4V Microspheres Via
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Thermal and crystallization kinetics of yttrium-doped phosphate-based glasses
(2019)
Journal Article
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