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

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

References

[1] Yu C, Jia F, Ai Z, et al. Direct oxidation of methanol on self-supported nanoporous gold film electrodes with high catalytic activity and stability[J]. Chemistry of Materials, 2007, 19(25): 6065-6067.
[2] Liu H, Tian N, Brandon M, et al. Tetrahexahedral Pt nanocrystal catalysts decorated with Ru adatoms and their enhanced activity in methanol electrooxidation[J]. ACS Catalysis, 2012, 2(5): 708-715.
[3] Su C, Hsueh Y, Kei C, et al. Fabrication of high-activity hybrid Pt@ZnO catalyst on carbon cloth by atomic layer deposition for photoassisted electro-oxidation of methanol[J]. The Journal of Physical Chemistry C, 2013, 117(22): 11610-11618.
[4] Xie W, Herrmann C, K?mpe K, et al. Synthesis of bifunctional Au/Pt/Au core/shell nanoraspberries for in situ SERS monitoring of platinum-catalyzed reactions[J]. Journal of the American Chemical Society, 2011, 133(48): 19302-19305.
[5] Xu C, Wang L, Mu X, et al. Nanoporous PtRu alloys for electrocatalysis[J]. Langmuir, 2010, 26(10): 7437-7443.
[6] Wang L, Nemoto Y, Yamauchi Y. Direct synthesis of spatially-controlled Pt-on-Pd bimetallic nanodendrites with superior electrocatalytic activity[J]. Journal of the American Chemical Society, 2011, 133(25): 9674-9677.
[7] Guo S, Dong S, Wang E. Novel Te/Pt hybrid nanowire with nanoporous surface: A catalytically active nanoelectrocatalyst[J]. The Journal of Physical Chemistry C, 2010, 114(11): 4797-4801.
[8] Hwang S, Yoo S, Jang S, et al. Ternary Pt-Fe-Co alloy electrocatalysts prepared by electrodeposition: Elucidating the roles of Fe and Co in the oxygen reduction reaction[J]. The Journal of Physical Chemistry C, 2011, 115(5): 2483-2488.
[9] Guo S, Zhang S, Sun X, et al. Synthesis of ultrathin FePtPd nanowires and their use as catalysts for methanol oxidation reaction[J]. Journal of the American Chemical Society, 2011, 133(39): 15354-15357.
[10] Huang X, Zhao Z, Fan J, et al. Amine-assisted synthesis of concave polyhedral platinum nanocrystals having {411} high-index facets[J]. Journal of the American Chemical Society, 2011, 133(13): 4718-4721.
[11] Zhang Z, Hui J, Liu Z, et al. Glycine-mediated syntheses of Pt concave nanocubes with high-index {hk0} facets and their enhanced electrocatalytic activities[J]. Langmuir, 2012, 28(42): 14845-14848.
[12] Yang L, Song X, Qi M, et al. Templated high-yield synthesis of Pt nanorods enclosed by high-index {311} facets for methanol selective oxidation[J]. Journal of Materials Chemistry A, 2013, 1(25): 7316-7320.
[13] Xia B, Wu H, Yan Y, et al. Ultrathin and ultralong single-crystal platinum nanowire assemblies with highly stable electrocatalytic activity[J]. Journal of the American Chemical Society, 2013, 135(25): 9480-9485.
[14] Teng X, Yang H. Synthesis of platinum multipods: An induced anisotropic growth[J]. Nano Letters, 2005, 5(5): 885-891.
[15] Zhang D, Chang W, Okajima T, et al. Electrodeposition of platinum nanoparticles in a room-temperature ionic liquid[J]. Langmuir, 2011, 27(23): 14662-14668.
[16] Tian N, Zhou Z, Sun S, et al. Synthesis of tetrahexahedral platinum nanocrystals with high-index facets and high electro-oxidation activity[J]. Science, 2007, 316(5825): 732-735.
[17] Xia B, Wu H, Wang X, et al. One-pot synthesis of cubic PtCu3 nanocages with enhanced electrocatalytic activity for the methanol oxidation reaction[J]. Journal of the American Chemical Society, 2012, 134(34): 13934-13937.
[18] Tiwari J, Pan F, Lin. Facile approach to the synthesis of 3D platinum nanoflowers and their electrochemical characteristics[J]. New Journal of Chemistry, 2009, 33(7): 1482-1485.
[19] He Y, Li G, Wang Z, et al. Pt nanorods aggregates with enhanced electrocatalytic activity toward methanol oxidation[J]. The Journal of Physical Chemistry C, 2010, 114(45): 19175-19181.