Structural changes at various Pt single crystal surfaces with potential cycles in acidic and alkaline solutions

Furuya, Nagakazu; Shibata, Masami

doi:10.1016/s0022-0728(99)00077-7

Cited by 65 publications

(78 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The CV of the cubic nanoparticles gave sharp redox peaks at 0.27 V and broad shoulder peaks at 0.35 V. A similar CV for cubic Pt nanoparticles prepared by a colloid method was reported by several researchers [26][27][28]. Electrochemical hydrogen adsorption and desorption have been studied on Pt single crystals in H 2 SO 4 by some researchers [15][16][17][18][19][20]29]. Clavilier et al [16,17] have shown that the Pt (1 0 0) plane gives two well-defined hydrogen adsorption/desorption peaks at 0.27 and 0.37 V, which they assigned to the terrace edge sites and terrace sites, respectively.…”

Section: Cyclic Voltammetry Of Cubic and Cuboctahedral Pt Nanoparticlessupporting

confidence: 68%

“…As shown above, there are many reports only evaluating the catalytic activity of the morphology of Pt [1,5,[15][16][17][18][19][20], and there are also many reports only on how to control the shape of Pt [6][7][8][9][10][11][12][13][14]. However, the flame annealing method which mainly reported the catalytic activity on the crystal orientation of Pt cannot prepare the Pt/C as actual catalysts of PEFC.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Shape-Controlled Platinum Nanoparticles of Different Sizes and Their Electrochemical Properties

2010

View full text Add to dashboard Cite

Platinum (Pt) nanoparticles with controlled shapes and sizes were prepared from a solution of K 2 PtCl 4 in the presence of polyacrylic acid (PAA) as a capping reagent. The effect of temperature, pH, and PAA concentration on the shape, size, and stability of the nanoparticles were investigated. Cubic Pt nanoparticles of different sizes in the range of 4.4-14 nm and cuboctahedral nanoparticles of an average size of 14 nm were obtained. The cubic and cuboctahedral Pt nanoparticles showed strong features of Pt {1 0 0} faces and Pt {1 0 0} and Pt {1 1 1} faces, respectively, on their cyclic voltammograms under argon atmosphere, respectively. Rotating ring disk electrode measurements in O 2 -saturated H 2 SO 4 solution revealed that the catalytic activity for oxygen reduction reaction (ORR) of cubic Pt nanoparticles (average size 10 nm) was higher than that of cuboctahedral Pt nanoparticles (average size 14 nm). The activity for ORR of both cubic and cuboctahedral Pt nanoparticles decreased slightly after polycrystallization by repeated potential cycling in the range of 0.05 to 1.4 V.

show abstract

Section: Cyclic Voltammetry Of Cubic and Cuboctahedral Pt Nanoparticlessupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Shape-Controlled Platinum Nanoparticles of Different Sizes and Their Electrochemical Properties

2010

View full text Add to dashboard Cite

show abstract

“…It is known that the repetitive cycling in the oxide region causes the loss of the wide (111) and (100) domains initially present on the polycrystalline Pt surface [20,21], leaving a more disordered surface. This surface disorder is induced by oxygen place-exchange, which forms islands on the previously ordered terraces leading to a more disordered structure [22][23][24]. Chatenet and co-workers propose that the disappearance of the inhibition near E ~ 0.7 V in the voltammogram in presence of BH 4 -for the cycled…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Borohydride electro-oxidation on Pt single crystal electrodes

Briega-Martos

Herrero

Feliu

2015

Electrochemistry Communications

View full text Add to dashboard Cite

The borohydride oxidation reaction on platinum single-crystal electrodes has been studied in sodium hydroxide solution using static and rotating conditions. The results show that borohydride electro-oxidation is a structure sensitive process on Pt surfaces. Significant changes in the measured currents are observed at low potentials. In this region, the Pt (111) electrode exhibits the lowest activity, whereas the highest currents are measured for the Pt(110) electrode. The behavior of the different electrodes is discussed taking as reference the observed behavior on the blank electrolyte and the possible formation of weakly adsorbed intermediates.

show abstract

“…Finally, an electrochemical activation [30] was performed before each series of measurements. This was achieved by running 18 cyclic voltammograms at a scan rate of 50 mV s À1 followed by 9 voltammograms at 30 mV s À1 in deoxygenated (N 2 for 5 min) 0.1 mol L À1 H 2 SO 4 [31].…”

Section: Preparation Of the Mova And Rotating Disk Working Electrodesmentioning

confidence: 99%

“…The potential scan was between the anodic and cathodic limit potentials. The electrochemical activation allowed not only to have the same active working electrode area [30] (which is different from the geometric one [31,32]) but also to clean its surface [32 -34].…”

Section: Preparation Of the Mova And Rotating Disk Working Electrodesmentioning

confidence: 99%

Metal On‐Line Voltammetric Analyzer for On‐Site Monitoring of Iron Speciation in Acid Mine Drainage Waters: Development and Characterization

et al. 2009

View full text Add to dashboard Cite

The development of a simple, low cost, portable metal on-line voltammetric analyzer (MOVA) for the iron analysis, as well as other species, in mining effluents is presented. It consists of a voltammetric cell based on an impinging jet flow configuration, a fluidic system controlled by gravity and electronics. Laboratory tests were performed to optimize the system as well as the analytical conditions for Fe speciation measurements. MOVA was then tested in the laboratory, in samples of both mining effluents. The results showed that iron in both mining effluents, as well as copper and arsenic, can be measured in oxygenated samples.

show abstract

Structural changes at various Pt single crystal surfaces with potential cycles in acidic and alkaline solutions

Cited by 65 publications

References 31 publications

Shape-Controlled Platinum Nanoparticles of Different Sizes and Their Electrochemical Properties

Shape-Controlled Platinum Nanoparticles of Different Sizes and Their Electrochemical Properties

Borohydride electro-oxidation on Pt single crystal electrodes

Metal On‐Line Voltammetric Analyzer for On‐Site Monitoring of Iron Speciation in Acid Mine Drainage Waters: Development and Characterization

Contact Info

Product

Resources

About