Stable and Active Oxygen Reduction Catalysts with Reduced Noble Metal Loadings through Potential Triggered Support Passivation
Name
celc.202000278.pdf
Description
Published version
Size
814.21 KB
Format
Adobe PDF
Checksum (MD5)
6b3a2e52af11c6a6f7701263d6106985
Author(s)
Göhl, Daniel
Rueß, Holger
Schlicht, Stefanie
Vogel, Alexandra
Rohwerder, Michael
Mayrhofer, Karl JJ
Bachmann, Julien
Román-Leshkov, Yuriy
Schneider, Jochen M
Ledendecker, Marc
Date Issued
2020
Journal
ChemElectroChem
Publisher
Wiley
Version
Final published version
Abstract
© 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. The development of stable, cost-efficient and active materials is one of the main challenges in catalysis. The utilization of platinum in the electroreduction of oxygen is a salient example where the development of new material combinations has led to a drastic increase in specific activity compared to bare platinum. These material classes comprise nanostructured thin films, platinum alloys, shape-controlled nanostructures and core–shell architectures. Excessive platinum substitution, however, leads to structural and catalytic instabilities. Herein, we introduce a catalyst concept that comprises the use of an atomically thin platinum film deposited on a potential-triggered passivating support. The model catalyst exhibits an equal specific activity with higher atom utilization compared to bulk platinum. By using potential-triggered passivation of titanium carbide, irregularities in the Pt film heal out via the formation of insoluble oxide species at the solid/liquid interface. The adaptation of the described catalyst design to the nanoscale and to high-surface-area structures highlight the potential for stable, passivating catalyst systems for various electrocatalytic reactions such as the oxygen reduction reaction.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1002/CELC.202000278
