Facile synthesis of continuous Pt island networks and their electrochemical properties for methanol electrooxidation

Tiwari, Jitendra N.; Pan, Fu‐Ming; Tiwari, Rajanish N.; Nandi, Shreya

doi:10.1039/b813935k

Cited by 39 publications

(28 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculated EASA area of Pt nanoparticles/GO and Pt/C are ~59.1 and ~73.4 m 2 g −1 , respectively. This value is calculated by integrating the CO oxidation peak of the first CO-stripping cycle, assuming an oxidation charge value of 420 μC cm −2 for a monolayer of CO adsorbed on a smooth Pt surface333435363738. However, the EASA area of Pt n /gDNA–GO is ~149.8 m 2 g −1 , which is more than double that estimated from the H upd adsorption/desorption experiments.…”

Section: Resultsmentioning

confidence: 99%

Stable platinum nanoclusters on genomic DNA–graphene oxide with a high oxygen reduction reaction activity

et al. 2013

Self Cite

View full text Add to dashboard Cite

Nanosize platinum clusters with small diameters of 2–4 nm are known to be excellent catalysts for the oxygen reduction reaction. The inherent catalytic activity of smaller platinum clusters has not yet been reported due to a lack of preparation methods to control their size (<2 nm). Here we report the synthesis of platinum clusters (diameter ≤1.4 nm) deposited on genomic double-stranded DNA–graphene oxide composites, and their high-performance electrocatalysis of the oxygen reduction reaction. The electrochemical behaviour, characterized by oxygen reduction reaction onset potential, half-wave potential, specific activity, mass activity, accelerated durability test (10,000 cycles) and cyclic voltammetry stability (10,000 cycles) is attributed to the strong interaction between the nanosize platinum clusters and the DNA–graphene oxide composite, which induces modulation in the electronic structure of the platinum clusters. Furthermore, we show that the platinum cluster/DNA–graphene oxide composite possesses notable environmental durability and stability, vital for high-performance fuel cells and batteries.

show abstract

Section: Resultsmentioning

confidence: 99%

Stable platinum nanoclusters on genomic DNA–graphene oxide with a high oxygen reduction reaction activity

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…Other interesting features of a 2D material is not only for basic understating of growth mechanism, but also for developing innovative applications in photocatalysts, sensors, nanoreactors, and nanocontainers, [81]. Important 2D nanostructure images are shown in figure 4, such as island structure (junctions), nanoplates, nanodisks, branched structures, nanoprisms, nanosheets, and nanowalls [82][83][84][85][86][87][88][89][90]. [86], (C) nanoplates [87], (D) nanosheets [88], (E) nanowalls [89], and (F) nanodisks [90].…”

Section: Two Dimensional (2d)mentioning

confidence: 98%

Recent development in 2D materials beyond graphene

Gupta

Thangavel

Seal

2015

Progress in Materials Science

1,291

747

View full text Add to dashboard Cite

“…In the absence of HCl, with an aqueous solution of 2 mol/L H 2 PtCl 6 + 1 mol/L H 2 SO 4 , SO 4 2-ions from H 2 SO 4 had a negligible effect on the synthesis of the Pt nanocubes because the concentration of H 2 SO 4 was lower than the concentration of H 2 PtCl 6 . Figure 4(c) shows a typical SEM image of the truncated Pt nanocubes at t = 20 min, which consist of a mixture of small Pt cubes and rods.…”

Section: Characterization Of Samplesmentioning

confidence: 95%

Controlled synthesis and growth of perfect platinum nanocubes using a pair of low-resistivity fastened silicon wafers and their electrocatalytic properties

Tiwari

Lin³

2011

Nano Res.

Self Cite

View full text Add to dashboard Cite

Perfect platinum (Pt) nanocubes with high density have been synthesized by controlled reduction of hexachloroplatinic acid in the presence of H 2 SO 4 and HCl, employing a pair of low-resistivity fastened silicon (FS) wafers at room temperature. The presence of the additive charges (induced by prior etching of the silicon surface with HF to remove any SiO 2 layer) between the interfaces of the FS surface results in a high charge density and facilitates fast deposition of Pt nanoparticles via electroless plating. The charge density, stirring time, and homogeneity of the aqueous solution influenced the geometrical shapes of the Pt nanoparticles. The parameters were finely tuned in order to control the nucleation and growth rates and obtain perfect Pt nanocubes. The perfect Pt nanocubes were single crystalline with exposed {100} facets. Per equivalent Pt surface areas, the perfect Pt nanocubes showed enhanced catalytic activity relative to truncated Pt nanocubes or spherical Pt nanoparticles for the electrooxidation of liquid feed fuels such as methanol and ethanol. Moreover, there a strong correlation was observed between the optical, electrical, thermal, magnetic, and catalytic properties of the perfect Pt nanocubes which should lead to a variety of technological applications of these materials.

show abstract

Facile synthesis of continuous Pt island networks and their electrochemical properties for methanol electrooxidation

Cited by 39 publications

References 19 publications

Stable platinum nanoclusters on genomic DNA–graphene oxide with a high oxygen reduction reaction activity

Stable platinum nanoclusters on genomic DNA–graphene oxide with a high oxygen reduction reaction activity

Recent development in 2D materials beyond graphene

Controlled synthesis and growth of perfect platinum nanocubes using a pair of low-resistivity fastened silicon wafers and their electrocatalytic properties

Contact Info

Product

Resources

About