Electrochemical Fabrication of Two-Dimensional Flower-like Pt Nanostructures for Methanol Electrocatalytic Oxidation

Authors

Xia WANG, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
Jun HU, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
Yong-Jun LI, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;Follow

Corresponding Author

Yong-Jun LI(liyongjunef@gmail.com)

Abstract

Two-dimensional flower-like Pt nanostructures (2D FPNs) were fabricated on glassy carbon substrates by galvanostatical electrochemical technique. The electrolyte was the HAuCl₄ + HClO₄ aqueous solution without addition of any structure-directing organic reagent, which made as-prepared Pt nanostructures cleaner, exhibiting much higher reactivity. Scanning electron microscopic images revealed that 2D FPNs were spherical Pt nano-flowers constructed by the smallest building blocks, nano-leaves. The number density of spherical Pt nano-flowers can be tuned by controlling the electrodeposition time. High resolution transmission electron microscopic images indicated that each nano-leaf was formed by growing along Pt(111) direction. Electrocatalytic activities of as-prepared 2D FPNs were closely linked with the electrodeposition time. The electrocatalytic activity of 2D FPNs under the optimized electrodeposition time was slightly higher than that of the commercial Pt/C catalyst with much better tolerance to CO-like poisoning molecules. It may be attributed to the exposure of specified facets and the cleanness of surface.

Graphical Abstract

Keywords

platinum, methanol, nanostructure, electrodeposition, electrocatalytic, oxidation

DOI Link

https://doi.org/10.13208/j.electrochem.131166

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2014-08-28

Online Available Date

2014-03-22

Revised Date

2014-03-16

Received Date

2013-12-30

Recommended Citation

Xia WANG, Jun HU, Yong-Jun LI. Electrochemical Fabrication of Two-Dimensional Flower-like Pt Nanostructures for Methanol Electrocatalytic Oxidation[J]. Journal of Electrochemistry, 2014 , 20(4): 365-369.
DOI: 10.13208/j.electrochem.131166
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss4/11