Galvanic replacement mediated synthesis of hollow Pt nanocatalysts : significance of residual Ag for the H2 evolution reaction

Bansal, Vipul, O'Mullane, Anthony P., & Bhargava, Suresh K. (2009) Galvanic replacement mediated synthesis of hollow Pt nanocatalysts : significance of residual Ag for the H2 evolution reaction. Electrochemistry Communications, 11(8), pp. 1639-1642.

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Abstract

With the increasing popularity of the galvanic replacement approach towards the development of bimetallic nanocatalysts, special emphasis has been focused on minimizing the use of expensive metal (e.g. Pt), in the finally formed nanomaterials (e.g. Ag/Pt system as a possible catalyst for fuel cells). However, the complete removal of the less active sacrificial template is generally not achieved during galvanic replacement, and its residual presence may significantly impact on the electrocatalytic properties of the final material. Here, we investigate the hydrogen evolution reaction (HER) activity of Ag nanocubes replaced with different amounts of Pt, and demonstrate how the bimetallic composition significantly affects the activity of the alloyed nanomaterial.

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ID Code: 64263
Item Type: Journal Article
Refereed: Yes
Keywords: Galvanic replacement; Ag/Pt nanocubes; Electrocatalysis; Hydrogen evolution reaction
DOI: 10.1016/j.elecom.2009.06.018
ISSN: 1388-2481
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Nov 2013 02:09
Last Modified: 05 Jun 2014 02:44

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