Adsorption and thermal evolution of SO2 on the Pt(110) surface

Zebisch, P.; Stichler, M.; Trischberger, P.; Weinelt, Martin; Steinrück, Hans‐Peter

doi:10.1016/s0039-6028(96)01019-9

Cited by 46 publications

(45 citation statements)

References 41 publications

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“…[26][27][28][29][30][31][32][33] Rather it matches fairly well with that found for multilayers of sulphur deposited on Au after oxidation of sulphide at pHs ranging from acidic to highly alkaline. 30,[34][35][36][37] Moreover, a photoelectronic core level at 162.4 eV was found in the spectra of Pt samples emersed at various potentials (0.8, 1.1, and 1.3 V) during a potential linear sweep from 0.0 to 1.5 V/RHE run in a 10-4 M Na 2 S + 0.1 M Na 2 CO 3 solution free of bulk phenol ( Figure 7).…”

Section: Xps Measurementssupporting

confidence: 85%

X-Ray Photoelectron Spectroscopy Study of the Composition of Polyphenol Films Formed on Pt by Electropolymerisation of Phenol in the Presence of Sulphide in Carbonate Medium

Lapuente

Quijada

Huerta

et al. 2003

Polym J

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ABSTRACT:The chemical composition and structure of polyphenol films formed electrochemically on Pt from bulk phenol in the absence and in the presence of solution sulphide were studied by XPS. The C1s (284.2-284.6 and 285.6-286 eV) and the O1s (533 eV) signals are consistent with a polymeric structure consisting of an aromatic carbon ring backbone linked by ether-like bonds and with hydroxyl groups. This structure is common to all the examined films formed under either potentiodynamic or potentiostatic conditions, even though the coatings formed in the presence of sulphide seemed to possess a higher ether-like oxygen content. Polyphenol films generated by cyclic voltammetry in the presence of sulphide contained a small amount of incorporated sulphur, with a characteristic binding energy of 162.3 eV which is essentially identical to that found for a sulphur layer deposited on Pt from sulphide in phenol-free solutions. The film is described as a S-polyphenol composite material, in which the S fraction is mainly incorporated at the early stages of filming. Sulphur-polyphenol composite coatings proved to possess more effective barrier properties than S-free polyphenol films.KEY WORDS Cyclic Voltammetry / X-Ray Photoelectron Spectroscopy / Sulphur / PPO / Corrosion Inhibition / Barrier Film / Protective coatings made of certain conducting or insulating polymeric films (or a blend of both) have proved to be effective against metallic corrosion. 1-6 Conducting polymeric films can impart active protection by exchanging electrons with the metallic substrate, generally pushing the corrosion potential into the passive region. This fact is not, however, sufficient for a successful protection. Tight adherence to the surface, high mechanical strength, film integrity and insolubility are mandatory requisites. Many insulating polymers meet these requirements and, provided they behave as strong physical barriers against corrosive electrolyte penetration, can effect satisfactory protection degrees. Despite their non-electroactive nature, thin insulating films can be formed onto metallic or semiconducting substrates by electropolymerisation from the bulk monomer, before dielectric properties manifest and the film growth is inhibited. Thus, the coating process can also benefit from the advantages of electrochemical methods, namely, simplicity, and flexibility of the experimental apparatus, efficient coating of not readily accesible areas and higher homogeneity of the films.Among insulating polymers, polyphenol films (also called polyoxyphenylene, poly(phenylene) oxide or PPO films) have received much attention. 1, 2, 7-20 These films were electropolymerised from phenol or phenol derivatives in a wide variety of electrolytic media, ranging from organic 9, 17 to hydroalcoholic 1, 2, 7, 10 to aqueous solutions 8,[12][13][14][15][16][18][19][20] at various pH. The role of several ring substituents was checked in order to increase the monomer solubility in the working electrolyte, to direct the oxidative coupling mechanism to desired ri...

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Section: Xps Measurementssupporting

confidence: 85%

X-Ray Photoelectron Spectroscopy Study of the Composition of Polyphenol Films Formed on Pt by Electropolymerisation of Phenol in the Presence of Sulphide in Carbonate Medium

Lapuente

Quijada

Huerta

et al. 2003

Polym J

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“…In support of this, the study of Jones et al (2003) on the 2 wt% Pt=Al 2 O 3 powdered catalysts in an isothermal plug-ow reactor and exposed to a CH 4 /air ow doped with 10 ppm of mercaptan mixture, found evidence of sulphates and sulphides from FTIR spectra. Although the kinetic rates of the individual steps of sulphides and sulphates formation cannot be found in the literature at present, previous studies agree that sulphides quickly react on the surface to form sulphates, and that sulphates remain stable up to 1033 K on Al 2 O 3 (Waqif et al, 1997), and up to 650 K on Pt (Zebisch et al, 1997). The results of Fig.…”

Section: Comparison Of Kinetic Data Of Ch 4 Oxidation With Similar Rementioning

confidence: 70%

Kinetics of methane oxidation on Pt catalysts in the presence of H2S and SO2

Dupont

Jones

Zhang

et al. 2004

Chemical Engineering Science

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“…In general, atomic sulfur and its oxides, SO x (x = 1-4) exhibit a rich surface chemistry on noble metals [23][24][25][26]. A number of different adsorption states has been reported for SO x and the wide range of possible oxidation states leads to several feasible reaction pathways [27][28][29][30][31][32][33][34][35]. The adsorption of SO 2 on Pt single crystals was investigated with different techniques including temperature programmed desorption (TPD) [36,37], electron energy loss spectroscopy (EELS) [38], X-ray absorption fine structure (XAFS) [30], UV-and X-ray photoelectron spectroscopy (UPS, XPS) [29-31, 38, 39], infrared reflection absorption spectroscopy (IRAS) [32] and density functional theory (DFT) [32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…The thermal evolution of adsorbed SO 2 was also investigated on several Pt surfaces: On Pt(111), SO 2 mainly desorbs intact and only minor amounts of SO 3 and atomic sulfur are observed. On a more corrugated surface like Pt(110), and on stepped surfaces like Pt(322) and Pt(355), the heating of SO 2 layers leads to higher amounts of SO 3 and atomic sulfur [29,39]. For Pt(110), the initial SO 2 coverage thereby determines whether S or SO 3 is preferentially formed, and for high SO 2 coverages also the formation of SO 4 was observed.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Reaction of SO2 on Graphene-Supported Pt Nanoclusters

et al. 2015

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Atomic sulfur and its oxides are common catalyst poisons and intriguing research subjects. Recently, graphene-supported nanoclusters were introduced as suitable model catalysts. We investigated the adsorption and reaction of SO 2 on graphene-supported Pt nanocluster arrays with high-resolution X-ray photoelectron spectroscopy. SO 2 adsorbs in two geometries-perpendicular and parallel to the surface-on both cluster facets and steps. Further insight is gained from the comparison of our results to previous data of SO 2 on Pt(111) and two stepped single crystal surfaces-Pt(322) and Pt(355)-with (100) and (111) steps, respectively. We find a remarkable similarity to the adsorption situation on Pt(322). However, thermal evolution experiments revealed several similarities to both Pt(322) and Pt (355), showing that the Pt nanoclusters exhibit a mixture of (100) and (111) steps.

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Adsorption and thermal evolution of SO2 on the Pt(110) surface

Cited by 46 publications

References 41 publications

X-Ray Photoelectron Spectroscopy Study of the Composition of Polyphenol Films Formed on Pt by Electropolymerisation of Phenol in the Presence of Sulphide in Carbonate Medium

X-Ray Photoelectron Spectroscopy Study of the Composition of Polyphenol Films Formed on Pt by Electropolymerisation of Phenol in the Presence of Sulphide in Carbonate Medium

Kinetics of methane oxidation on Pt catalysts in the presence of H2S and SO2

Adsorption and Reaction of SO2 on Graphene-Supported Pt Nanoclusters

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