Tuning the activity of Pt alloy electrocatalysts by means of the lanthanide contraction
María Escudero‐EscribanoCenter for Individual Nanoparticle Functionality (CINF), Department of Physics, Technical University of Denmark, 2800 Lyngby, DenmarkPaolo MalacridaCenter for Individual Nanoparticle Functionality (CINF), Department of Physics, Technical University of Denmark, 2800 Lyngby, DenmarkMartin Hangaard HansenCenter for Atomic-Scale Materials Design (CAMD), Department of Physics, Technical University of Denmark, 2800 Lyngby, DenmarkUlrik Grønbjerg Vej-HansenCenter for Atomic-Scale Materials Design (CAMD), Department of Physics, Technical University of Denmark, 2800 Lyngby, DenmarkAmado Velázquez‐PalenzuelaCenter for Individual Nanoparticle Functionality (CINF), Department of Physics, Technical University of Denmark, 2800 Lyngby, DenmarkVladimir TripkovićCenter for Atomic-Scale Materials Design (CAMD), Department of Physics, Technical University of Denmark, 2800 Lyngby, DenmarkJakob SchiøtzCenter for Atomic-Scale Materials Design (CAMD), Department of Physics, Technical University of Denmark, 2800 Lyngby, DenmarkJan RossmeislCenter for Atomic-Scale Materials Design (CAMD), Department of Physics, Technical University of Denmark, 2800 Lyngby, DenmarkIfan E. L. StephensCenter for Individual Nanoparticle Functionality (CINF), Department of Physics, Technical University of Denmark, 2800 Lyngby, DenmarkIb ChorkendorffCenter for Individual Nanoparticle Functionality (CINF), Department of Physics, Technical University of Denmark, 2800 Lyngby, Denmark
2016en
ABI
Аннотация
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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