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Tetrahedral Palladium Nanocrystals: A New Support for Platinum Monolayer Electrocatalysts with High Activity and Stability in the Oxygen Reduction Reaction

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Published/Copyright: October 1, 2012
Zeitschrift für Physikalische Chemie
From the journal Zeitschrift für Physikalische Chemie Volume 226 Issue 9-10

Abstract

The recent availability of tetrahedral palladium (PdTH) nanocrystals with cleaned surfaces allowed us to evaluate their facet-specific electrochemical properties as a new support of platinum monolayer (PtML) catalysts. The Pd–PtML core-shell electrocatalyst was examined by combining structural analyses and Density Functional Theory (DFT) with electrochemical techniques. The surfaces of the PdTH core are composed of (111) facets wherein the Pd atoms are highly coordinated and have low surface energy. Our results revealed that in comparison with sphere Pd (PdSP)-supported PtML or pure Pt, the PdTH-supported PtML features more surface contraction and a downshift of d-band relative to the Fermi level. These geometric- and electronic-effects determine the higher activity of PtML/PdTH/C for the oxygen reduction reaction (ORR) compared to that of PtML/PdSP/C. This shape-property interdependence illuminated new approaches to basic- and applied- research on Pt-based ORR electrocatalysts of significant importance to the widespread use of fuel cells.

Keywords: Tetrahedral Palladium; Platinum Monolayer; Oxygen Reduction Reaction; Electrocatalysis; Fuel Cells
* Correspondence address: Brookhaven National Laboratory, Chemistry Department, 11973 Upton, NY, U.S.A.,
Published Online: 2012-10-1
Published in Print: 2012-10-1

© by Oldenbourg Wissenschaftsverlag, München, Germany

Articles in the same Issue

  1. Preface
  2. Building versus Structure Elements: Ionic Charge Carriers in Solids
  3. A Brief Review of Determinism in the Prediction of Localized Corrosion Damage
  4. La0.6Sr0.4CoO3-δ (LSC) Thin Film Electrodes with Very Fast Oxygen Reduction Kinetics Prepared by a Sol-Gel Route
  5. Nitrate Reduction on Platinum (111) Surfaces Modifiedl with Bi: Single Crystalsl and Nanoparticles
  6. Fundamental Investigation of the HER on a Pt(111) Surface at Temperatures down to 120K
  7. Impedance Spectra of Pt(100) in Aqueous H2SO4 and HCl Solutions Around the Hydrogen Adsorption-Desorption Peak
  8. Lifting of Thermally-Induced Surface Reconstruction on Au(100) Electrode by Protonated Molecules of Dopamine
  9. The Under Potential Deposition of Cu on Au (111) in Nonaqueous Acetonitrile
  10. Lead Underpotential Deposition on Pt-submonolayer Modified Au(111)
  11. Adsorption of Solvent Cations on Au(111) and Au(100) in Alkylimidazolium-Based Ionic Liquids – Worm-Like versus Micelle-Like Structures
  12. Measurements of the Potentials of Zero Free Charge and Zero Total Charge for 1-thio- ± bβ-D-glucose and DPTL Modified Au(111) Surface in Different Electrolyte Solutions
  13. Tert-Pentanol Adsorption on Ag(100) and Ag(110) from an Aqueous Solution and its Comparison with that on Ag(111), Hg, Ga and Bi(001)
  14. Tetrahedral Palladium Nanocrystals: A New Support for Platinum Monolayer Electrocatalysts with High Activity and Stability in the Oxygen Reduction Reaction
  15. Surface Modification of a n-Si(111) Electrode through Aldehyde Grafting and Subsequent Metallization: Theory and Experiment
  16. Ion Transfer Mechanisms Accompanying p-Doping of Poly(3,4-Ethylenedioxythiophene) Films in Deep Eutectic Solvents
  17. Adsorption of Additives: Hardness and Softness at Electrified Interfaces
https://doi.org/10.1524/zpch.2012.0239
Keywords for this article
Tetrahedral Palladium; Platinum Monolayer; Oxygen Reduction Reaction; Electrocatalysis; Fuel Cells

Articles in the same Issue

  1. Preface
  2. Building versus Structure Elements: Ionic Charge Carriers in Solids
  3. A Brief Review of Determinism in the Prediction of Localized Corrosion Damage
  4. La0.6Sr0.4CoO3-δ (LSC) Thin Film Electrodes with Very Fast Oxygen Reduction Kinetics Prepared by a Sol-Gel Route
  5. Nitrate Reduction on Platinum (111) Surfaces Modifiedl with Bi: Single Crystalsl and Nanoparticles
  6. Fundamental Investigation of the HER on a Pt(111) Surface at Temperatures down to 120K
  7. Impedance Spectra of Pt(100) in Aqueous H2SO4 and HCl Solutions Around the Hydrogen Adsorption-Desorption Peak
  8. Lifting of Thermally-Induced Surface Reconstruction on Au(100) Electrode by Protonated Molecules of Dopamine
  9. The Under Potential Deposition of Cu on Au (111) in Nonaqueous Acetonitrile
  10. Lead Underpotential Deposition on Pt-submonolayer Modified Au(111)
  11. Adsorption of Solvent Cations on Au(111) and Au(100) in Alkylimidazolium-Based Ionic Liquids – Worm-Like versus Micelle-Like Structures
  12. Measurements of the Potentials of Zero Free Charge and Zero Total Charge for 1-thio- ± bβ-D-glucose and DPTL Modified Au(111) Surface in Different Electrolyte Solutions
  13. Tert-Pentanol Adsorption on Ag(100) and Ag(110) from an Aqueous Solution and its Comparison with that on Ag(111), Hg, Ga and Bi(001)
  14. Tetrahedral Palladium Nanocrystals: A New Support for Platinum Monolayer Electrocatalysts with High Activity and Stability in the Oxygen Reduction Reaction
  15. Surface Modification of a n-Si(111) Electrode through Aldehyde Grafting and Subsequent Metallization: Theory and Experiment
  16. Ion Transfer Mechanisms Accompanying p-Doping of Poly(3,4-Ethylenedioxythiophene) Films in Deep Eutectic Solvents
  17. Adsorption of Additives: Hardness and Softness at Electrified Interfaces
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