Fabrication of nanoporous Cu–Pt(Pd) core/shell structure by galvanic replacement and its application in electrocatalysis
- 28 October 2011
- journal article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 3 (12), 4626-4632
- https://doi.org/10.1021/am201057t
Abstract
We describe a general strategy to fabricate a new type of nanoporous core/shell structured bimetallic nanocomposites with controllable metal components. Nanoporous copper (NPC) obtained by dealloying Cu/Al alloy is used as both reducing agent and three-dimensional substrate. Electron microscope and X-ray diffraction characterizations demonstrated that a simply galvanic-replacement reaction with H2PtCl6 aqueous solution can easily generate nanoporous core/shell structure with a thin Pt/Cu alloy shell and Cu (or Pt/Cu alloy) core. The morphology and crystal structure evolution of the nanocomposites are studied and discussed in detail. The as-prepared bimetallic PtCu nanocomposites show greatly enhanced catalytic activity and stability toward methanol electro-oxidation as compared with commercial Pt/C catalyst. This facile in situ preparation strategy is also suitable for large-scale production of this novel and inexpensive catalyst.Keywords
This publication has 49 references indexed in Scilit:
- One-Step Electrochemical Synthesis of PtNi Nanoparticle-Graphene Nanocomposites for Nonenzymatic Amperometric Glucose DetectionACS Applied Materials & Interfaces, 2011
- Platinum-Monolayer Shell on AuNi0.5Fe Nanoparticle Core Electrocatalyst with High Activity and Stability for the Oxygen Reduction ReactionJournal of the American Chemical Society, 2010
- Nanoporous Pt−Co Alloy Nanowires: Fabrication, Characterization, and Electrocatalytic PropertiesNano Letters, 2009
- AuPt Alloy Nanoparticles for CO‐Tolerant Hydrogen Activation: Architectural Effects in Au‐Pt Bimetallic NanocatalystsAdvanced Functional Materials, 2007
- Shaping binary metal nanocrystals through epitaxial seeded growthNature Materials, 2007
- The Promotional Effect of Gold in Catalysis by Palladium-GoldScience, 2005
- Seed‐Mediated Growth of Bimetallic PrismsAdvanced Materials, 2005
- Tin/Platinum Bimetallic Nanotube Array and its Electrocatalytic Activity for Methanol OxidationAdvanced Materials, 2005
- Core–Shell Assembled Nanoparticles as CatalystsAdvanced Materials, 2001
- Synthesis of “Solid Solution” and “Core-Shell” Type Cobalt−Platinum Magnetic Nanoparticles via Transmetalation ReactionsJournal of the American Chemical Society, 2001