Synthesis of Tetrahexahedral Platinum Nanocrystals with High-Index Facets and High Electro-Oxidation Activity

@article{Tian2007SynthesisOT,
  title={Synthesis of Tetrahexahedral Platinum Nanocrystals with High-Index Facets and High Electro-Oxidation Activity},
  author={Na Tian and Zhi-You Zhou and Shigang Sun and Yong Ding and Zhong Lin Wang},
  journal={Science},
  year={2007},
  volume={316},
  pages={732 - 735}
}
The shapes of noble metal nanocrystals (NCs) are usually defined by polyhedra that are enclosed by {111} and {100} facets, such as cubes, tetrahedra, and octahedra. Platinum NCs of unusual tetrahexahedral (THH) shape were prepared at high yield by an electrochemical treatment of Pt nanospheres supported on glassy carbon by a square-wave potential. The single-crystal THH NC is enclosed by 24 high-index facets such as {730}, {210}, and/or {520} surfaces that have a large density of atomic steps… Expand

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References

SHOWING 1-10 OF 26 REFERENCES
Shape-Controlled Synthesis of Gold and Silver Nanoparticles
TLDR
Monodisperse samples of silver nanocubes were synthesized in large quantities by reducing silver nitrate with ethylene glycol in the presence of poly(vinyl pyrrolidone) (PVP), characterized by a slightly truncated shape bounded by {100, {110}, and {111} facets. Expand
Pt nanocrystals: shape control and Langmuir-Blodgett monolayer formation.
TLDR
It is found that addition of silver ion enhances the crystal growth rate along 100, and essentially determines the shape and surface structure of the Pt nanocrystals. Expand
The development of facetting and roughening at platinum polyfacetted single-crystal electrodes in a chloroplatinic acid solution
Abstract The description of a procedure for producing preferred crystallographic orientation and roughness development at Pt single-crystal microspheres is the main topic of this paper. It is basedExpand
The stability and structure of high miller index platinum crystal surfaces in vacuum and in the presence of adsorbed carbon and oxygen
Abstract The surface structures of twenty-two high Miller Index crystal faces of platinum were studied in ultrahigh vacuum (uhv) when clean and in the presence of a monolayer of chemisorbed oxygen orExpand
Shape-Dependent Catalytic Activity of Platinum Nanoparticles in Colloidal Solution
The activation energies and the average rate constants are determined in the 298 K−318 K temperature range for the early stages of the nanocatalytic reaction between hexacyanoferrate (III) andExpand
Stabilization of Platinum Oxygen-Reduction Electrocatalysts Using Gold Clusters
TLDR
It is demonstrated that platinum (Pt) oxygen-reduction fuel-cell electrocatalysts can be stabilized against dissolution under potential cycling regimes by modifying Pt nanoparticles with gold (Au) clusters, and data suggest that the Au clusters confer stability by raising the Pt oxidation potential. Expand
Synthesis of palladium icosahedra with twinned structure by blocking oxidative etching with citric acid or citrate ions.
TLDR
Pd is a face-centered cubic (fcc) noble metal, and Pdnanoparticles may take three different shapes when fastnucleation and growth are involved: truncated cubes oroctahedra, decahedRA, and icosahedra. Expand
Shape-Controlled Synthesis of Colloidal Platinum Nanoparticles
TLDR
Tetrahedral, cubic, irregular-prismatic, icosahedral, and cubo-octahedral particle shapes were observed, whose distribution was dependent on the concentration ratio of the capping polymer material to the platinum cation. Expand
Improved Oxygen Reduction Activity on Pt3Ni(111) via Increased Surface Site Availability
TLDR
It is demonstrated that the Pt3Ni( 111) surface is 10-fold more active for the ORR than the corresponding Pt(111) surface and 90-foldMore active than the current state-of-the-art Pt/C catalysts for PEMFC. Expand
Oxygen-induced step-edge faceting; a precursor to (410) planar faceting of Cu(100) vicinal surfaces
Abstract Scanning tunneling microscopy has been applied to an atomistic scale investigation of the oxygen-induced restructuring of a Cu(100) vicinal surface, close to (610) but with average stepExpand
...
1
2
3
...