Platinum/Tantalum Carbide Core–Shell Nanoparticles with Sub‐Monolayer Shells for Methanol and Oxygen Electrocatalysis
Name
Advanced Energy Materials - 2024 - Wang - Platinum Tantalum Carbide Core Shell Nanoparticles with Sub‐Monolayer Shells for.pdf
Description
Published version
Size
2.48 MB
Format
Adobe PDF
Checksum (MD5)
46de3a185adf51729bea638d7eea0897
Author(s)
Wang, Zhenshu
Kang, Jin Soo
Göhl, Daniel
Paciok, Paul
Gonçalves, Danelle S.
Lim, Hyung‐Kyu
Zanchet, Daniela
Heggen, Marc
Shao‐Horn, Yang
Ledendecker, Marc
Date Issued
March 29, 2024
Journal
Advanced Energy Materials
Publisher
Wiley
Citation
Z. Wang, J. S. Kang, D. Göhl, P. Paciok, D. S. Gonçalves, H.-K. Lim, D. Zanchet, M. Heggen, Y. Shao-Horn, M. Ledendecker, Y. Román-Leshkov, Platinum/Tantalum Carbide Core–Shell Nanoparticles with Sub-Monolayer Shells for Methanol and Oxygen Electrocatalysis. Adv. Energy Mater. 2024, 2304092.
Version
Final published version
Abstract
Core–shell architectures provide great opportunities to improve catalytic activity, but achieving nanoparticle stability under electrochemical cycling remains challenging. Herein, core–shell nanoparticles comprising atomically thin Pt shells over earth‐abundant TaC cores are synthesized and used as highly durable electrocatalysts for the methanol oxidation reaction (MOR) and the oxygen reduction reaction (ORR) needed to drive direct methanol fuel cells (DMFCs). Characterization data show that a thin oxidic passivation layer protects the TaC core from undergoing dissolution in the fuel cell‐relevant potential range, enabling the use of partially covered Pt/TaC core–shell nanoparticles for MOR and ORR with high stability and enhanced catalytic performance. Specifically, at the anode the surface‐oxidized TaC further enhances MOR activity compared to conventional Pt nanoparticles. At the cathode, the Pt/TaC catalyst feature increases tolerance to methanol crossover. These results show unique synergistic advantages of the core–shell particles and open opportunities to tailor catalytic properties for electrocatalytic reactions.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1002/aenm.202304092
