Facile fabrication of nanoporous gold with bimodal pore structure

A hierarchical nanoporous gold (HNPG) membrane with a bimodal pore size distribution was fabricated by a simple one-step dehydration reaction of H3BO3, which is different from the complex methods of multi-cyclic electrochemical co-alloying/dealloying. The HNPG exhibits a wide pore distribution from...

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Bibliographic Details
Published in:Materials letters 2016-12, Vol.184, p.282-285
Main Authors: Chen, A.Y., Qiu, Y.J., Zhu, Y.K., Wang, D., Yang, J.H., Wang, X.Y., Xie, X.F.
Format: Article
Language:English
Subjects:
Bimodal structure
Chemical reactions
Crystals
Dealloying
Formations
Gold
Methanol electrooxidation
Methyl alcohol
Nanostructure
Porosity
Porous materials
Raman
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Summary:A hierarchical nanoporous gold (HNPG) membrane with a bimodal pore size distribution was fabricated by a simple one-step dehydration reaction of H3BO3, which is different from the complex methods of multi-cyclic electrochemical co-alloying/dealloying. The HNPG exhibits a wide pore distribution from 10 to 120nm. The special architecture of HNPG significantly enhances the Raman signal to crystal violet and electrocatalytic activity toward the oxidation of methanol. The formation mechanism of the bimodal structure is discussed. •A dehydration reaction of H3BO3 produces a hierarchical nanoporous gold.•The pore sizes exhibit a wide distribution of 10 and 120nm at 250°C.•The upper and lower hierarchy channels are simultaneously formed.•The Raman scattering signal is enhanced by the hierarchical structure.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2016.08.070