Electrochemical adsorption behaviour of Pt(100) in sulphuric acid solution

Clavilier, J.; Durand, Robert; Guinet, G.; Faure, R.

doi:10.1016/s0022-0728(81)80488-3

Cited by 142 publications

(56 citation statements)

References 12 publications

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“…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%

“…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. Marković and Ross [20] reported that the Pt (1 1 0) plane gives characteristic hydrogen adsorption/desorption peaks at 0.13 V, while Pt (1 0 0) plane gives two well-defined hydrogen adsorption/desorption peaks at 0.25 and 0.4 V. Hence, the presence of the redox peaks at 0.27 and 0.35 V indicated that the surface of the cubic nanoparticles consisted of Pt {1 0 0} faces, which agrees with the surface structure of the cubic Pt nanoparticles [30].…”

Section: Cyclic Voltammetry Of Cubic and Cuboctahedral Pt Nanoparticlesmentioning

confidence: 99%

“…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%

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

2010

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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.

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Section: Cyclic Voltammetry Of Cubic and Cuboctahedral Pt Nanoparticlessupporting

confidence: 68%

Section: Cyclic Voltammetry Of Cubic and Cuboctahedral Pt Nanoparticlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2010

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“…And Wagner and Ross 71 reported that the anomalous features in the cyclic voltammetry of Pt(111) first seen by 20 Clavilier et al in 1979 72 are best explained by a hydrogen bonded aqueous network with an ability to transmit structural phase information over greater-than-molecular distances, caused by the partial oxidation of water clusters forming a hydrated OH ads layer, and that the presence of strongly 25 adsorbing anions can disrupt this. Clavilier et al later confirmed that this is the most likely explanation for the results they reported 73 .…”

Section: Transients In the Absence Of Co Adsmentioning

confidence: 99%

The role of adsorbed hydroxyl species in the electrocatalytic carbon monoxide oxidation reaction on platinum

Kucernak

Offer

2008

Phys. Chem. Chem. Phys.

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The assumption that "OH ads " or other oxygen containing species is formed on polycrystalline or nanoparticulate platinum through a fast and reversible process at relatively low potentials is often made. In this paper we discuss the implications of this assumption and the difficulty in reconciling it with experimental phenomena. We show how presenting chrono-amperometric transients as log-10 log plots for potentials steps in the presence and absence of an adlayer of carbon monoxide o n polycrystalline platinum is particularly useful in understanding the time evolution of the CO oxidation reaction. When using log-log plots a clear power law decay can be observed in the transients both in the presence and absence of an adlayer of carbon monoxide. We explain this as an extension of current theory, such that the rate determining step in both cases is the formation of 15 a hydrogen bonded water-OH ads network, strongly influenced by anions, and that CO ads oxidation occurs, at least in part by the diffusion of OH ads through this network. We hypothesize that, at low potentials the formation of OH ads at active sites is fast and reversible but that transport of OH ads away from those sites may be rate limiting. The assumption that overall OH ads formation on platinum is fast and reversible is therefore highly dependent upon the platinum surface and th e 20 experimental conditions and it may not be appropriate for polycrystalline surfaces in sulphuric acid. Therefore, although the formation of OH ads on platinum in the absence of strongly adsorbing anions on 'ideal' surfaces is almost certainly fast and reversible, on realistic fuel cell relevant surfaces under non-ideal conditions this assumption cannot be made, and instead the formation of an OH ads adlayer may be somewhat slow and is associated with the formation of hydrogen bonded 25 water-OH ads networks on the surface. We expect this to be a more realistic description for what occurs during CO ads oxidation on fuel cell relevant catalysts which are highly heterogeneous and which have a highly defective surface. IntroductionThe formation of oxides on platinum surfaces at high potentials is relatively well studied yet contentious. The role of the species typically called "OH ads " in the surface catalysis of platinum catalysts is crucial in understanding a large 5 number of reactions, of which the most common example is the carbon monoxide oxidation reaction (COOR). The nature of this species is somewhat controversial, although Anderson has recently shown through theoretical ab initio charge selfconsistent methods that OH ads should form on a Pt surface at a 10 potential of about 0.6 V. Several investigators claim that OH ads is the species responsible for reacting with adsorbed CO ads , and that this is a chemical Langmuir-Hinshelwood (L-H) reaction [1][2][3][4][5][6][7] . The lowest potentials at which the COOR has been reported is 150 mV for carbon supported platinum 8 , 200 15 mV for a porous platinum electrode 9 and for polycrystalline platinum 10 , and ...

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“…LEED and -AES were later performed on flame-annealed surfaces in separate experiments [13], but these analyzed surfaces were not subjected to through-air transfer or electrochemistry.…”

Section: Introductionmentioning

confidence: 99%

Long-range structural effects in the anomalous voltammetry on ultra-high vacuum prepared Pt (111)

Wagner¹,

Ross²

1988

Journal of Electroanalytical Chemistry and Interfacial Electroc

154

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Electrochemical adsorption behaviour of Pt(100) in sulphuric acid solution

Cited by 142 publications

References 12 publications

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

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

The role of adsorbed hydroxyl species in the electrocatalytic carbon monoxide oxidation reaction on platinum

Long-range structural effects in the anomalous voltammetry on ultra-high vacuum prepared Pt (111)

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