Synthesis of Mesoporous Pt Films with Tunable Pore Sizes from Aqueous Surfactant Solutions

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Platinum (Pt) is widely used as battery electrodes, catalysts for chemicals, and catalysts for exhaust gas decomposition in industries. Increasing need and very limited supply of rare Pt is a serious problem in the world. Here, we propose new synthetic way for reducing the use of Pt in a catalytic system by increasing the surface area and modifying the Pt surface structure. Several types of mesoporous Pt films with different pore sizes ranging from 5 to 30 nm are prepared by electrochemical plating in aqueous surfactant solutions. The mesopore walls are composed of connected Pt nanoparticles with around 3 nm in diameter. The Pt atomic crystallinity is coherently extending across over several Pt nanoparticles, showing a large number of atomic steps, which can accelerate methanol oxidation reaction. As a result of a high surface area and unique Pt surface, our mesoporous Pt film exhibits high potentiality as a superior electrocatalyst.
Publisher
AMER CHEMICAL SOC
Issue Date
2012-05
Language
English
Article Type
Article
Keywords

ALKYLTRIMETHYLAMMONIUM-KANEMITE COMPLEXES; LIQUID-CRYSTALLINE PHASES; BLOCK-COPOLYMER SOLUTIONS; ELECTROCHEMICAL SYNTHESIS; PLATINUM NANOPARTICLES; THIN-FILMS; TEMPLATES; CATALYSTS; SILICA; ELECTROOXIDATION

Citation

CHEMISTRY OF MATERIALS, v.24, no.9, pp.1591 - 1598

ISSN
0897-4756
DOI
10.1021/cm300054b
URI
http://hdl.handle.net/10203/104544
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