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Synthesis of Catalytic Porous Metallic Nanorods by Galvanic Exchange Reaction Melinda Mohl,,
 

Summary: Synthesis of Catalytic Porous Metallic Nanorods by Galvanic Exchange Reaction
Melinda Mohl,,
Ashavani Kumar,*,
Arava Leela Mohana Reddy,
Akos Kukovecz,
Zoltan Konya,
Imre Kiricsi,
Robert Vajtai,
and Pulickel M. Ajayan*,
Department of Mechanical Engineering and Materials Science, Rice UniVersity, Houston, Texas 77251, and
Department of Applied and EnVironmental Chemistry, UniVersity of Szeged, Rerrich B. ter 1,
6720 Szeged, Hungary
ReceiVed: August 29, 2009; ReVised Manuscript ReceiVed: NoVember 5, 2009
We demonstrate a simple method for the synthesis of nanoporous metal (Au, Pt, and Pd) rods by the galvanic
exchange reaction using Ni as a sacrificial template. Nickel nanorods, prepared by electrodeposition inside
porous alumina membrane, were converted to various nanoporous metallic structures by dispersing them in
metal salt solutions of the respective metals that are galvanically exchanged. The catalytic activity of the
porous Pt and Pd nanorods in the hydrogenation of ethylene was comparable to supported Pt and Pd
nanoparticles. The porous nanorods provide a new form of unsupported catalysts in contrast to traditional
supported nanoparticle catalysts and can be synthesized in uniform sizes and separated easily from the reaction

  

Source: Ajayan, Pulickel M. - Department of Mechanical Engineering and Materials Science, Rice University

 

Collections: Materials Science