Enhanced Electrochemical Performances of Nanoporous Gold by Surface Modification of Titanium Dioxide Nanoparticles

Akira Kudo; Takeshi Fujita; Xingyou Lang; Luyang Chen; Mingwei Chen

doi:10.2320/matertrans.MAW201014

Akira Kudo, Takeshi Fujita, Xingyou Lang, Luyang Chen, Mingwei Chen

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Keywords: nanoporous metal, dealloying, methanol oxidation, scanning electron microscope (SEM), transmission electron microscope (TEM)

JOURNAL FREE ACCESS

2010 Volume 51 Issue 9 Pages 1566-1569

DOI https://doi.org/10.2320/matertrans.MAW201014

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Abstract

We reported novel nanoporous gold (NPG) with surface modified by TiO₂ nanoparticles. The as-fabricated sample showed larger effective area than bare NPG. Microstructure characterization demonstrated that the TiO2 nanoparticles effectively suppressed the coarsening of the nanoporous structure by the reaction with gold ligaments. The resultant porous nanocomposite with rough ligament surfaces was proofed to spontaneously possess enhanced catalytic performance towards methanol oxidation. This result would yield an effective and inexpensive method to improve NPG’s catalytic activity.

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