XPS spectroscopic study of potentiostatic and galvanostatic oxidation of Pt electrodes in H2SO4 and HClO4

Hammond, Janeen

doi:10.1016/0368-1874(77)80146-9

Cited by 7 publications

(7 citation statements)

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“…5a) that can be assigned to the presence of Pt 4 þ in PtO 2 . A similar band has been reported by Hammond and Winograd [18] on a thin layer of PtO 2 on abraded gold blank sample. This is also in good agreement with the work of Ono et al [19].…”

Section: X-ray Photoelectron Spectroscopy Characterization (Xps)supporting

confidence: 69%

Microstructure and property control in TiO2–Pt nanocomposite thin films

Lahmar

Pfeiffer

Habouti

et al. 2015

Ceramics International

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Section: X-ray Photoelectron Spectroscopy Characterization (Xps)supporting

confidence: 69%

Microstructure and property control in TiO2–Pt nanocomposite thin films

Lahmar

Pfeiffer

Habouti

et al. 2015

Ceramics International

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“…It was demonstrated before that intermediates of a catalytic reaction could be ex situ analysed on the surface of the catalyst. 20,21 Here, we report that chemically adsorbed oxygen reduction intermediates can be detected on the nitrogen-doped multilayer graphene after ORR using X-ray photoelectron spectroscopy (XPS). This not only implies that nitrogen close to carbon in nitrogen-doped graphene is involved in the catalysis of ORR process and, more importantly, can be used to observe the active nitrogen sites and pinpoint the ORR pathway.…”

mentioning

confidence: 99%

Observation of Active Sites for Oxygen Reduction Reaction on Nitrogen-Doped Multilayer Graphene

et al. 2014

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Active sites and the catalytic mechanism of nitrogen-doped graphene in an oxygen reduction reaction (ORR) have been extensively studied but are still inconclusive, partly due to the lack of an experimental method that can detect the active sites. It is proposed in this report that the active sites on nitrogen-doped graphene can be determined via the examination of its chemical composition change before and after ORR. Synchrotron-based X-ray photoelectron spectroscopy analyses of three nitrogen-doped multilayer graphene samples reveal that oxygen reduction intermediate OH(ads), which should chemically attach to the active sites, remains on the carbon atoms neighboring pyridinic nitrogen after ORR. In addition, a high amount of the OH(ads) attachment after ORR corresponds to a high catalytic efficiency and vice versa. These pinpoint that the carbon atoms close to pyridinic nitrogen are the main active sites among the different nitrogen doping configurations.

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“…etching process (Fig. 4b), peaks at 778.7 and 853.1 eV were detected for sample AC-Co2 and AC-Ni2, which was due to the presence of metallic Co and Ni (Hammond and Winograd 1977;Wang 1998). This is in good agreement with the results obtained by XRD analysis (Fig.…”

Section: Metal Phasesmentioning

confidence: 94%

Physicochemical properties and desulfurization activities of metal oxide/biomass-based activated carbons prepared by blending method

Fan

Jiang

et al. 2014

Adsorption

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Column activated carbons were prepared from walnut shell chars and transition metal oxide powders (i.e. Co 2 O 3 , Ni 2 O 3 , CuO and V 2 O 5 ) with blending method. Samples were characterized by N 2 adsorption-desorption, X-ray diffraction, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy. The texture properties of all modified activated carbons with metal oxides dosage of \5 wt% did not change evidently. The basic functionalities of these activated carbons increased relative to blank carbon. Moreover, metal species with different oxidation states coexisted on the modified activated carbons. The optimal dosage of all metal oxides was 2 wt%. The sulfur capacities of these modified activated carbons were 7.7-46.0 % higher than that of blank activated carbon and the highest occurred for V 2 O 5 modified activated carbon. The improved desulfurization performance was mainly attributed to the higher catalytic activity of the active metal oxides formed in the presence of O 2 during the desulfurization process.

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XPS spectroscopic study of potentiostatic and galvanostatic oxidation of Pt electrodes in H2SO4 and HClO4

Cited by 7 publications

References 0 publications

Microstructure and property control in TiO2–Pt nanocomposite thin films

Microstructure and property control in TiO2–Pt nanocomposite thin films

Observation of Active Sites for Oxygen Reduction Reaction on Nitrogen-Doped Multilayer Graphene

Physicochemical properties and desulfurization activities of metal oxide/biomass-based activated carbons prepared by blending method

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