Platinum/Tantalum Carbide Core–Shell Nanoparticles with Sub‐Monolayer Shells for Methanol and Oxygen Electrocatalysis
[2];
[1]
- Department of Chemical Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA
- Department of Chemical Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA, Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA 02139 USA, Department of Energy Systems Engineering Department of Energy Resources Engineering &, Research Institute of Energy and Resources Seoul National University Seoul 08826 Republic of Korea
- Department of Chemistry Ernst‐Berl‐Institut für Technische und Makromolekulare Chemie Technical University of Darmstadt 64287 Darmstadt Germany
- Ernst Ruska‐Center for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute Forschungszentrum Jülich GmbH 52425 Jülich Germany
- Institute of Chemistry University of Campinas SP 13083‐970 Brazil
- Division of Chemical Engineering and Bioengineering Kangwon National University Chuncheon Gangwon‐do 24341 Republic of Korea
- Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA 02139 USA, Department of Mechanical Engineering &, Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA
- Department of Chemistry Ernst‐Berl‐Institut für Technische und Makromolekulare Chemie Technical University of Darmstadt 64287 Darmstadt Germany, Department of Sustainable Energy Materials Technical University of Munich, Campus Straubing for Biotechnology and Sustainability 94315 Straubing Germany
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.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- NONE; SC0012704
- OSTI ID:
- 2331360
- Alternate ID(s):
- OSTI ID: 2331361
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 17 Vol. 14; ISSN 1614-6832
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
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