Tuning the activity of Pt alloy electrocatalysts by means of the lanthanide contraction
Abstract
A lanthanide boost for platinum: High loadings of precious platinum are needed for automotive fuel cells, because the kinetics of the oxygen reduction reaction (ORR) are relatively slow. Escudero-Escribano et al. studied a series of platinum alloys with lanthanides and alkaline earth elements. When the surfaces were leached to leave pure platinum, they developed compressive strain that boosted the ORR activity—up to a factor of 6 for terbium. Enthalpy effects helped to stabilize these alloys under operating conditions. Science , this issue p. 73
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PtxGd NPs exhibited an outstanding activity of 3.6 A mg-1 Pt at 0.9 V RHE in liquid half cells, a little lower than Pt3Ni(111).
“Pt x Gd NPs exhibited an outstanding activity of 3.6 A mg À1 Pt at 0.9 V RHE in liquid half cells, a little lower than Pt 3 Ni (111).14”
From A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells (2017) · cites this paper as [14]
The Pt shell can be a Pt-rich surface layer by electrochemical de-alloying or annealing or acid leaching; a Pt overlayer by seed-based chemical reduction; or a Pt monolayer by underpotential deposition.
“The Pt “shell” could be in different forms, like: a Pt-rich surface layer by electrochemical de-alloying 20 or annealing 21 or acid leaching; 14 a Pt overlayer by seedbased chemical reduction; 22 and a Pt monolayer by underpotential deposition.23,24”
From A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells (2017) · cites this paper as [14]
Ternary, quaternary and quinary Pt alloys for ORR have been investigated in the past few years.
“the ternary, quaternary and quinary alloys have now been investigated in the past few years.[12][13][14][15][16]”
From A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells (2017) · cites this paper as [14]
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- Authors
- Escudero-Escribano, M., Malacrida, P., Hansen, M. H., Vej-Hansen, U. G., Velázquez-Palenzuela, A., Tripkovic, V., Schiøtz, J., Rossmeisl, J., Stephens, I. E. L., & Chorkendorff, I.
- Affiliations
- Center for Individual Nanoparticle Functionality (CINF), Department of Physics, Technical University of Denmark, 2800 Lyngby, Denmark.
- Technical University of Denmark (DK)
- University of Copenhagen (DK)
- Center for Atomic-Scale Materials Design (CAMD), Department of Physics, Technical University of Denmark, 2800 Lyngby, Denmark.
- Massachusetts Institute of Technology (US)
- Corresponding author
- Stephens, Ifan E. L.
- Chorkendorff, Ib
- ORCID
- Venue
- Science
- Published
- 2016-04
- Volume
- 352
- Issue
- 6281
- Pages
- 73-76
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2332015053
- Cited by
- 1,057
- References
- 6
- Citations by year
- 2026: 79 · 2025: 93 · 2024: 115 · 2023: 121 · 2022: 114 · 2021: 129 · 2020: 110 · 2019: 103 · 2018: 85 · 2017: 79 · 2016: 28
- FWCI
- 26.70
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Research at the University of Copenhagen (University of Copenhagen) (publishedVersion)
- Technical University of Denmark, DTU Orbit (Technical University of Denmark, DTU) (submittedVersion)
- Funders
- Danish National Research Foundation
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
- Keywords
- oxygen reduction reaction, lanthanide contraction, lattice parameters, strain effects, acid leaching, volcano plot, low-temperature fuel cells, catalyst stability
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