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- W2440731020 endingPage "7530" @default.
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- W2440731020 abstract "Adsorption of SO2 in the presence of O2 on Pt/C catalysts often used as electrocatalysts has been investigated by temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS). The amounts of SO2 adsorption on Pt/C in the presence of O2 were much higher than those in the absence of O2 (SO2–N2) and from the carbon support (Vulcan XC-72) alone. Adsorption is dependent on oxygen concentration over the range 0–20% but reaches saturation at 20% O2. The spillover of SO2 from Pt to the carbon support has been proposed for 10, 20, and 40% Pt loadings, characterized by desorption temperatures of approximately 150 and 260 °C for SO2 adsorbed on Pt and carbon, respectively. Adsorbed Pt–S, C–S, C–SOx, and Pt–SO4 species were identified by XPS as S-containing species on both Pt and carbon. Both TPD and XPS indicate that the carbon support plays a major role in SO2 adsorption, primarily as SOx (x = 3, 4). The bonding of S and SOx on the carbon support was strong enough that back diffusion to the Pt surface did not occur." @default.
- W2440731020 created "2016-06-24" @default.
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- W2440731020 date "2011-05-24" @default.
- W2440731020 modified "2023-09-27" @default.
- W2440731020 title "Effect of O<sub>2</sub> on the Adsorption of SO<sub>2</sub> on Carbon-Supported Pt Electrocatalysts" @default.
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- W2440731020 doi "https://doi.org/10.1021/la2000377" @default.
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